| Abies bracteata (D.Don) Poit. | 1 images |
| Abies concolor (Gordon & Glend.) Lindl. ex Hildebr. | 615 images |
| Abies grandis (Douglas ex D.Don) Lindl. | 567 images |
| Abies lasiocarpa (Hook.) Nutt. | 165 images |
| Abies magnifica A.Murray bis | 18 images |
| Abies procera Rehder | 262 images |
| Abronia angustifolia Greene | 7 images |
| Abronia fragrans Nutt. ex Hook. | 72 images |
| Abronia gracilis Benth. | 2 images |
| Abronia latifolia Eschsch. | 185 images |
| Abronia maritima Nutt. ex S.Watson | 6 images |
| Abronia mellifera Douglas ex Hook. | 5 images |
| Abronia pogonantha Heimerl | 19 images |
| Abronia umbellata Lam. | 151 images |
| Abronia villosa S.Watson | 1 images |
| Abutilon abutiloides (Jacq.) Garcke ex Hochr. | 17 images |
| Abutilon incanum (Link) Sweet | 18 images |
| Abutilon palmeri A.Gray | 15 images |
| Abutilon theophrasti Medik. | 2892 images |
| Acacia baileyana F.Muell. | 660 images |
| Acacia cyclops A.Cunn. ex G.Don | 29 images |
| Acacia dealbata Link | 5622 images |
| Acacia decurrens (J.C.Wendl.) Willd. | 71 images |
| Acacia elata A.Cunn. ex Benth. | 3 images |
| Acacia longifolia (Andrews) Willd. | 1001 images |
| Acacia mearnsii De Wild. | 1052 images |
| Acacia melanoxylon R.Br. | 1200 images |
| Acacia paradoxa DC. | 68 images |
| Acacia pycnantha Benth. | 366 images |
| Acacia retinodes Schltdl. | 2076 images |
| Acacia verticillata (L'Hér.) Willd. | 42 images |
| Acaciella angustissima (Mill.) Britton & Rose | 68 images |
| Acaena novae-zelandiae Kirk | 87 images |
| Acaena pinnatifida Ruiz & Pav. | 11 images |
| Acalypha californica Benth. | 27 images |
| Acalypha phleoides Cav. | 17 images |
| Acamptopappus shockleyi A.Gray | 17 images |
| Acanthomintha duttonii (Abrams) Jokerst | 2 images |
| Acanthomintha lanceolata Curran | 7 images |
| Acanthoscyphus parishii (Parry) Small | 5 images |
| Acanthus mollis L. | 12789 images |
| Acer campestre L. | 18789 images |
| Acer circinatum Pursh | 368 images |
| Acer glabrum Torr. | 146 images |
| Acer grandidentatum Nutt. | 71 images |
| Acer macrophyllum Pursh | 1082 images |
| Acer negundo L. | 16154 images |
| Achillea filipendulina Lam. | 5428 images |
| Achillea millefolium L. | 25092 images |
| Achlys triphylla DC. | 73 images |
| Achyrachaena mollis Schauer | 88 images |
| Acleisanthes longiflora A.Gray | 7 images |
| Acmispon americanus (Nutt.) Rydb. | 26 images |
| Acmispon cytisoides (Benth.) Brouillet | 5 images |
| Acmispon decumbens (Benth.) Govaerts | 3 images |
| Acmispon dendroideus (Greene) Brouillet | 12 images |
| Acmispon glaber (Vogel) Brouillet | 30 images |
| Acmispon procumbens (Greene) Brouillet | 1 images |
| Acmispon prostratus (Nutt.) Brouillet | 2 images |
| Acmispon rigidus (Benth.) Brouillet | 1 images |
| Aconitum columbianum Nutt. | 171 images |
| Acorus calamus L. | 630 images |
| Acourtia microcephala DC. | 35 images |
| Acourtia thurberi (A.Gray) Reveal & R.M.King | 8 images |
| Acourtia wrightii (A.Gray) Reveal & R.M.King | 1 images |
| Acrachne racemosa (B.Heyne ex Roth) Ohwi | 1 images |
| Actaea rubra (Aiton) Willd. | 704 images |
| Adelinia grande (Douglas ex Lehm.) J.I.Cohen | 360 images |
| Adenocaulon bicolor Hook. | 135 images |
| Adenophyllum porophylloides (A.Gray) Strother | 14 images |
| Adenophyllum porophyllum (Cav.) Hemsl. | 14 images |
| Adenostoma fasciculatum Hook. & Arn. | 16 images |
| Adenostoma sparsifolium Torr. | 73 images |
| Adiantum capillus-veneris L. | 3074 images |
| Adiantum jordanii Müll.Hal. | 162 images |
| Adonis aestivalis L. | 753 images |
| Adoxa moschatellina L. | 764 images |
| Aegilops cylindrica Host | 56 images |
| Aegilops geniculata Roth | 897 images |
| Aegilops tauschii Coss. | 19 images |
| Aegilops triuncialis L. | 143 images |
| Aeluropus littoralis (Gouan) Parl. | 100 images |
| Aeonium arboreum (L.) Webb & Berthel. | 4798 images |
| Aeonium haworthii Webb & Berthel. | 3985 images |
| Aeschynomene rudis Benth. | 16 images |
| Aesculus californica (Spach) Nutt. | 673 images |
| Agastache breviflora (A.Gray) Epling | 2 images |
| Agastache parvifolia Eastw. | 7 images |
| Agastache rupestris (Greene) Standl. | 109 images |
| Agastache urticifolia (Benth.) Kuntze | 102 images |
| Agave americana L. | 8043 images |
| Agave chrysantha Peebles | 9 images |
| Agave deserti Engelm. | 170 images |
| Agave murpheyi Gibson | 2 images |
| Agave palmeri Engelm. | 29 images |
| Agave parryi Engelm. | 422 images |
| Agave parviflora Torr. | 7 images |
| Agave schottii Engelm. | 13 images |
| Agave shawii Engelm. | 133 images |
| Agave toumeyana Trel. | 83 images |
| Agave utahensis Engelm. | 147 images |
| Ageratina adenophora (Spreng.) R.M.King & H.Rob. | 645 images |
| Ageratina herbacea (A.Gray) R.M.King & H.Rob. | 17 images |
| Ageratina occidentalis (Hook.) R.M.King & H.Rob. | 30 images |
| Ageratina paupercula (A.Gray) R.M.King & H.Rob. | 7 images |
| Ageratina rothrockii (A.Gray) R.M.King & H.Rob. | 3 images |
| Ageratum conyzoides L. | 555 images |
| Ageratum corymbosum Zuccagni | 1 images |
| Agnorhiza bolanderi (A.Gray) W.A.Weber | 8 images |
| Agoseris apargioides (Less.) Greene | 49 images |
| Agoseris aurantiaca (Hook.) Greene | 46 images |
| Agoseris glauca (Pursh) Raf. | 33 images |
| Agoseris grandiflora (Nutt.) Greene | 53 images |
| Agoseris heterophylla (Nutt.) Greene | 45 images |
| Agoseris retrorsa Greene | 28 images |
| Agrimonia eupatoria L. | 10695 images |
| Agrimonia gryposepala Wallr. | 308 images |
| Agrimonia striata Michx. | 18 images |
| Agropyron cristatum (L.) Gaertn. | 108 images |
| Agropyron desertorum (Fisch. ex Link) Schult. | 3 images |
| Agrostemma githago L. | 3776 images |
| Agrostis capillaris L. | 1545 images |
| Agrostis densiflora Vasey | 1 images |
| Agrostis exarata Trin. | 11 images |
| Agrostis gigantea Roth | 136 images |
| Agrostis hallii Vasey | 1 images |
| Agrostis mertensii Trin. | 10 images |
| Agrostis microphylla Steud. | 2 images |
| Agrostis pallens Trin. | 4 images |
| Agrostis perennans (Walter) Tuck. | 4 images |
| Agrostis scabra Willd. | 2 images |
| Agrostis stolonifera L. | 360 images |
| Agrostis variabilis Rydb. | 1 images |
| Ailanthus altissima (Mill.) Swingle | 11666 images |
| Aira praecox L. | 100 images |
| Aizoon pubescens Eckl. & Zeyh. | 29 images |
| Ajuga reptans L. | 21634 images |
| Albizia julibrissin Durazz. | 12668 images |
| Alcea rosea L. | 14464 images |
| Alchemilla arvensis (L.) Scop. | 468 images |
| Aldama cordifolia (A.Gray) E.E.Schill. & Panero | 4 images |
| Alhagi graecorum Boiss. | 8 images |
| Alhagi maurorum Medik. | 108 images |
| Alisma gramineum Lej. | 21 images |
| Alisma lanceolatum With. | 463 images |
| Alisma triviale Pursh | 35 images |
| Allenrolfea occidentalis (S.Watson) Kuntze | 28 images |
| Alliaria petiolata (M.Bieb.) Cavara & Grande | 30764 images |
| Allionia choisyi Standl. | 9 images |
| Allionia incarnata L. | 144 images |
| Allium acuminatum Hook. | 55 images |
| Allium ampeloprasum L. | 6132 images |
| Allium amplectens Torr. | 26 images |
| Allium anceps Kellogg | 23 images |
| Allium atrorubens S.Watson | 27 images |
| Allium bigelovii S.Watson | 2 images |
| Allium bisceptrum S.Watson | 20 images |
| Allium bolanderi S.Watson | 4 images |
| Allium brevistylum S.Watson | 3 images |
| Allium burlewii Davidson | 13 images |
| Allium campanulatum S.Watson | 20 images |
| Allium cepa L. | 2329 images |
| Allium cernuum Roth | 235 images |
| Allium cratericola Eastw. | 48 images |
| Allium crispum Greene | 24 images |
| Allium dichlamydeum Greene | 16 images |
| Allium falcifolium Hook. & Arn. | 44 images |
| Allium fimbriatum S.Watson | 29 images |
| Allium geyeri S.Watson | 3 images |
| Allium haematochiton S.Watson | 31 images |
| Allium hickmanii Eastw. | 1 images |
| Allium howellii Eastw. | 3 images |
| Allium hyalinum Curran | 11 images |
| Allium lacunosum S.Watson | 18 images |
| Allium lemmonii S.Watson | 14 images |
| Allium longispathum Redouté | 50 images |
| Allium macropetalum Rydb. | 9 images |
| Allium monticola Davidson | 8 images |
| Allium neapolitanum Cirillo | 3342 images |
| Allium nevadense S.Watson | 3 images |
| Allium obtusum Lemmon | 32 images |
| Allium parishii S.Watson | 3 images |
| Allium parryi S.Watson | 2 images |
| Allium parvum Kellogg | 11 images |
| Allium peninsulare Lemmon ex Greene | 35 images |
| Allium platycaule S.Watson | 22 images |
| Allium praecox Brandegee | 15 images |
| Allium sanbornii Alph.Wood | 7 images |
| Allium serra McNeal & Ownbey | 23 images |
| Allium shevockii McNeal | 4 images |
| Allium siskiyouense Ownbey ex Traub | 2 images |
| Allium tolmiei Baker | 1 images |
| Allium tribracteatum Torr. | 4 images |
| Allium triquetrum L. | 4185 images |
| Allium unifolium Kellogg | 57 images |
| Allium validum S.Watson | 48 images |
| Allium vineale L. | 3232 images |
| Allium yosemitense Eastw. | 7 images |
| Allotropa virgata Torr. & A.Gray | 10 images |
| Alnus alnobetula (Ehrh.) K.Koch | 1599 images |
| Alnus incana (L.) Moench | 2462 images |
| Alnus rhombifolia Nutt. | 11 images |
| Alnus rubra Bong. | 47 images |
| Aloe × schimperi Tod. | 5 images |
| Aloe vera (L.) Burm.f. | 10375 images |
| Alopecurus aequalis Sobol. | 119 images |
| Alopecurus arundinaceus Poir. | 36 images |
| Alopecurus carolinianus Walter | 3 images |
| Alopecurus geniculatus L. | 113 images |
| Alopecurus magellanicus Lam. | 12 images |
| Alopecurus myosuroides Huds. | 506 images |
| Alopecurus pratensis L. | 2738 images |
| Alopecurus saccatus Vasey | 4 images |
| Aloysia gratissima (Gillies & Hook.) Tronc. | 183 images |
| Alternanthera caracasana Kunth | 133 images |
| Alternanthera philoxeroides (Mart.) Griseb. | 337 images |
| Alyssum alyssoides (L.) L. | 1047 images |
| Alyssum desertorum Stapf | 20 images |
| Alyssum simplex Rudolphi | 177 images |
| Alyssum szovitsianum Fisch. & C.A.Mey. | 4 images |
| Amaranthus albus L. | 492 images |
| Amaranthus blitoides S.Watson | 496 images |
| Amaranthus blitum L. | 2200 images |
| Amaranthus californicus (Moq.) S.Watson | 12 images |
| Amaranthus caudatus L. | 3556 images |
| Amaranthus crassipes Schltdl. | 2 images |
| Amaranthus cruentus L. | 1054 images |
| Amaranthus deflexus L. | 1721 images |
| Amaranthus fimbriatus (Torr.) Benth. | 45 images |
| Amaranthus hybridus L. | 1404 images |
| Amaranthus hypochondriacus L. | 1206 images |
| Amaranthus palmeri S.Watson | 117 images |
| Amaranthus powellii S.Watson | 82 images |
| Amaranthus retroflexus L. | 8287 images |
| Amaranthus spinosus L. | 1285 images |
| Amaranthus torreyi (A.Gray) Benth. ex S.Watson | 35 images |
| Amaranthus viridis L. | 1524 images |
| Amaryllis belladonna L. | 2877 images |
| Ambrosia acanthicarpa Hook. | 63 images |
| Ambrosia artemisiifolia L. | 4743 images |
| Ambrosia chamissonis Greene | 133 images |
| Ambrosia confertiflora DC. | 19 images |
| Ambrosia dumosa (A.Gray) W.W.Payne | 5 images |
| Ambrosia monogyra (Torr. & A.Gray) Strother & B.G.Baldwin | 2 images |
| Ambrosia psilostachya DC. | 359 images |
| Ambrosia salsola (Torr. & A.Gray) Strother & B.G.Baldwin | 1 images |
| Ambrosia trifida L. | 976 images |
| Amelanchier alnifolia (Nutt.) Nutt. ex M.Roem. | 615 images |
| Amelanchier cusickii Fernald | 7 images |
| Amelanchier pallida Greene | 6 images |
| Amelanchier utahensis Koehne | 69 images |
| Amelichloa brachychaeta (Godr.) Arriaga & Barkworth | 9 images |
| Ammannia auriculata Willd. | 13 images |
| Ammannia coccinea Rottb. | 47 images |
| Ammannia robusta Heer & Regel | 5 images |
| Ammi majus L. | 1792 images |
| Amorpha canescens Pursh | 209 images |
| Amorpha fruticosa L. | 1881 images |
| Ampelodesmos mauritanicus (Poir.) T.Durand & Schinz | 386 images |
| Amsinckia menziesii (Lehm.) A.Nelson & J.F.Macbr. | 211 images |
| Amsonia grandiflora Alexander | 9 images |
| Amsonia palmeri A.Gray | 6 images |
| Amsonia tabernaemontana Walter | 685 images |
| Amsonia tomentosa Torr. & Frém. | 3 images |
| Anaphalis margaritacea (L.) Benth. & Hook.f. | 1292 images |
| Anchusa arvensis (L.) M.Bieb. | 2669 images |
| Anchusa azurea Mill. | 3056 images |
| Anchusa officinalis L. | 4541 images |
| Andropogon gerardi Vitman | 181 images |
| Andropogon glomeratus (Walter) Britton, Sterns & Poggenb. | 6 images |
| Andropogon virginicus L. | 3 images |
| Androsace elongata L. | 60 images |
| Androsace occidentalis Pursh | 5 images |
| Androsace septentrionalis L. | 159 images |
| Androstephium breviflorum S.Watson | 7 images |
| Anemone cylindrica A.Gray | 14 images |
| Anemone multifida Poir. | 97 images |
| Anemone parviflora Michx. | 15 images |
| Anemone tuberosa Rydb. | 15 images |
| Anemopsis californica (Nutt.) Hook. & Arn. | 101 images |
| Anethum graveolens L. | 2460 images |
| Angelica arguta Nutt. | 6 images |
| Angelica breweri A.Gray | 46 images |
| Angelica capitellata (A.Gray) Spalik, Reduron & S.R.Downie | 138 images |
| Angelica lineariloba A.Gray | 27 images |
| Angelica lucida L. | 44 images |
| Angelica pinnata S.Watson | 2 images |
| Angelica tomentosa S.Watson | 3 images |
| Anisacanthus thurberi (Torr.) A.Gray | 15 images |
| Anisocarpus madioides Nutt. | 14 images |
| Anoda cristata (L.) Schltdl. | 61 images |
| Anredera cordifolia (Ten.) Steenis | 978 images |
| Antennaria howellii Greene | 21 images |
| Antennaria lanata Greene | 10 images |
| Antennaria marginata Greene | 1 images |
| Antennaria media Greene | 5 images |
| Antennaria microphylla Rydb. | 5 images |
| Antennaria parvifolia Nutt. | 88 images |
| Antennaria pulchella Greene | 6 images |
| Antennaria rosea Greene | 2 images |
| Antennaria umbrinella Rydb. | 1 images |
| Anthemis arvensis L. | 3862 images |
| Anthemis cotula L. | 1487 images |
| Anthoxanthum aristatum Boiss. | 54 images |
| Anthoxanthum nitens (Weber) Y.Schouten & Veldkamp | 72 images |
| Anthoxanthum occidentale (Buckley) Veldkamp | 4 images |
| Anthoxanthum odoratum L. | 2211 images |
| Anthriscus caucalis M.Bieb. | 1700 images |
| Anthyllis vulneraria L. | 8248 images |
| Anticlea elegans (Pursh) Rydb. | 41 images |
| Antirrhinum majus L. | 14608 images |
| Anulocaulis annulatus (Coville) Standl. | 19 images |
| Anulocaulis leiosolenus (Torr.) Standl. | 3 images |
| Apera interrupta (L.) P.Beauv. | 31 images |
| Apera spica-venti (L.) P.Beauv. | 64 images |
| Aphanisma blitoides Nutt. ex Moq. | 5 images |
| Aphanostephus ramosissimus DC. | 36 images |
| Apium graveolens L. | 1878 images |
| Apocynum androsaemifolium L. | 995 images |
| Apocynum cannabinum L. | 880 images |
| Aponogeton distachyos L.f. | 267 images |
| Aquilegia barnebyi Munz | 3 images |
| Aquilegia chrysantha A.Gray | 60 images |
| Aquilegia coerulea E.James | 5 images |
| Aquilegia desertorum (M.E.Jones) Cockerell ex A.Heller | 24 images |
| Aquilegia elegantula Greene | 11 images |
| Aquilegia eximia Van Houtte ex Planch. | 9 images |
| Aquilegia flavescens S.Watson | 16 images |
| Aquilegia formosa Fisch. ex DC. | 61 images |
| Aquilegia pubescens Coville | 397 images |
| Aquilegia scopulorum Tidestr. | 4 images |
| Aquilegia shockleyi Eastw. | 370 images |
| Arabidopsis thaliana (L.) Heynh. | 2087 images |
| Arabis blepharophylla Hook. & Arn. | 32 images |
| Arabis hirsuta (L.) Scop. | 1421 images |
| Arabis modesta Rollins | 7 images |
| Aralia californica S.Watson | 154 images |
| Aralia humilis Cav. | 4 images |
| Araujia sericifera Brot. | 3050 images |
| Arbutus menziesii Pursh | 778 images |
| Arceuthobium campylopodum Engelm. | 33 images |
| Arceuthobium divaricatum Engelm. | 1 images |
| Arceuthobium douglasii Engelm. | 4 images |
| Arctium lappa L. | 9754 images |
| Arctium minus (Hill) Bernh. | 11311 images |
| Arctomecon merriamii Coville | 16 images |
| Arctostaphylos × media Greene | 3 images |
| Arctostaphylos auriculata Eastw. | 8 images |
| Arctostaphylos bakeri Eastw. | 5 images |
| Arctostaphylos canescens Eastw. | 28 images |
| Arctostaphylos columbiana Piper | 25 images |
| Arctostaphylos confertiflora Eastw. | 12 images |
| Arctostaphylos edmundsii J.T.Howell | 4 images |
| Arctostaphylos glandulosa Eastw. | 72 images |
| Arctostaphylos glauca Lindl. | 128 images |
| Arctostaphylos imbricata Eastw. | 14 images |
| Arctostaphylos manzanita Parry | 90 images |
| Arctostaphylos mewukka Merriam | 12 images |
| Arctostaphylos montereyensis Hoover | 4 images |
| Arctostaphylos myrtifolia Parry | 21 images |
| Arctostaphylos nissenana Merriam | 3 images |
| Arctostaphylos obispoensis Eastw. | 5 images |
| Arctostaphylos pajaroensis J.E.Adams | 1 images |
| Arctostaphylos pallida Eastw. | 16 images |
| Arctostaphylos parryana Lemmon | 9 images |
| Arctostaphylos patula Greene | 104 images |
| Arctostaphylos pringlei Parry | 6 images |
| Arctostaphylos pungens Kunth | 128 images |
| Arctostaphylos refugioensis Gankin | 2 images |
| Arctostaphylos regismontana Eastw. | 9 images |
| Arctostaphylos stanfordiana Parry | 33 images |
| Arctostaphylos tomentosa (Pursh) Lindl. | 18 images |
| Arctostaphylos uva-ursi (L.) Spreng. | 2000 images |
| Arctostaphylos virgata Eastw. | 7 images |
| Arctostaphylos viridissima (Eastw.) McMinn | 1 images |
| Arctostaphylos viscida Parry | 57 images |
| Arctotheca calendula (L.) Levyns | 1569 images |
| Arctotis fastuosa Jacq. | 4 images |
| Arctotis stoechadifolia P.J.Bergius | 141 images |
| Arenaria lanuginosa (Michx.) Rohrb. | 8 images |
| Arenaria serpyllifolia L. | 1306 images |
| Argemone corymbosa Greene | 52 images |
| Argemone munita Durand & Hilg. | 5 images |
| Argemone ochroleuca Sweet | 83 images |
| Argemone pleiacantha Greene | 54 images |
| Argemone polyanthemos (Fedde) Ownbey | 9 images |
| Argentina anserina (L.) Rydb. | 4750 images |
| Argyranthemum foeniculaceum (Willd.) Webb ex Sch.Bip. | 96 images |
| Aristida adscensionis L. | 125 images |
| Aristida californica Thurb. | 3 images |
| Aristida purpurea Nutt. | 7 images |
| Aristida ternipes Cav. | 10 images |
| Aristolochia californica Torr. | 140 images |
| Aristolochia watsonii Wooton & Standl. | 14 images |
| Armeria maritima (Mill.) Willd. | 5568 images |
| Armoracia rusticana G.Gaertn., B.Mey. & Scherb. | 246 images |
| Arnica cernua Howell | 3 images |
| Arnica chamissonis Less. | 83 images |
| Arnica cordifolia Hook. | 196 images |
| Arnica discoidea Benth. | 2 images |
| Arnica fulgens Pursh | 5 images |
| Arnica gracilis Rydb. | 1 images |
| Arnica lanceolata Nutt. | 20 images |
| Arnica latifolia Bong. | 31 images |
| Arnica mollis Hook. | 20 images |
| Arnica nevadensis A.Gray | 4 images |
| Arnica rydbergii Greene | 3 images |
| Arnica sororia Greene | 3 images |
| Arnica spathulata Greene | 3 images |
| Arrhenatherum elatius (L.) P.Beauv. ex J.Presl & C.Presl | 1833 images |
| Artemisia abrotanum L. | 1320 images |
| Artemisia absinthium L. | 4749 images |
| Artemisia annua L. | 3418 images |
| Artemisia arbuscula Nutt. | 19 images |
| Artemisia biennis Willd. | 132 images |
| Artemisia californica Less. | 792 images |
| Artemisia campestris L. | 1598 images |
| Artemisia cana Pursh | 28 images |
| Artemisia douglasiana Besser | 11 images |
| Artemisia dracunculus L. | 2251 images |
| Artemisia filifolia Torr. | 26 images |
| Artemisia frigida Willd. | 110 images |
| Artemisia inaequifolia Sòn.Garcia, Garnatje, McArthur, Pellicer, S.C.Sand | 1 images |
| Artemisia laciniata Willd. | 1 images |
| Artemisia ludoviciana Nutt. | 1101 images |
| Artemisia michauxiana Besser | 5 images |
| Artemisia nova A.Nelson | 4 images |
| Artemisia pycnocephala (Less.) DC. | 87 images |
| Artemisia spinescens D.C.Eaton | 1 images |
| Artemisia suksdorfii Piper | 48 images |
| Artemisia tridentata Nutt. | 328 images |
| Arthroceras subterminale (Parish) Piirainen & G.Kadereit | 28 images |
| Arum palaestinum Boiss. | 42 images |
| Aruncus dioicus (Walter) Fernald | 4359 images |
| Arundo donax L. | 2948 images |
| Asarum caudatum Lindl. | 177 images |
| Asarum hartwegii S.Watson | 70 images |
| Asarum lemmonii S.Watson | 24 images |
| Asclepias albicans S.Watson | 29 images |
| Asclepias angustifolia Schweigg. | 17 images |
| Asclepias asperula (Decne.) Woodson | 441 images |
| Asclepias brachystephana Engelm. ex Torr. | 20 images |
| Asclepias californica Greene | 80 images |
| Asclepias cordifolia (Benth.) Jeps. | 81 images |
| Asclepias cryptoceras S.Watson | 8 images |
| Asclepias curassavica L. | 2504 images |
| Asclepias engelmanniana Woodson | 8 images |
| Asclepias eriocarpa Benth. | 97 images |
| Asclepias erosa Torr. | 54 images |
| Asclepias fascicularis Decne. | 245 images |
| Asclepias hallii A.Gray | 10 images |
| Asclepias incarnata L. | 1088 images |
| Asclepias involucrata Engelm. ex Torr. | 2 images |
| Asclepias latifolia (Torr.) Raf. | 123 images |
| Asclepias lemmonii A.Gray | 7 images |
| Asclepias linaria Cav. | 82 images |
| Asclepias macrotis Torr. | 5 images |
| Asclepias nummularia Torr. | 2 images |
| Asclepias nyctaginifolia A.Gray | 1 images |
| Asclepias solanoana Woodson | 18 images |
| Asclepias speciosa Torr. | 689 images |
| Asclepias subulata Decne. | 76 images |
| Asclepias subverticillata (A.Gray) Vail | 16 images |
| Asclepias tuberosa L. | 2192 images |
| Asclepias uncialis Greene | 2 images |
| Asclepias verticillata L. | 186 images |
| Asclepias vestita Hook. & Arn. | 12 images |
| Asclepias viridiflora Raf. | 212 images |
| Asparagus asparagoides (L.) Druce | 268 images |
| Asparagus officinalis L. | 3040 images |
| Asparagus setaceus (Kunth) Jessop | 3214 images |
| Asperugo procumbens L. | 410 images |
| Asphodelus fistulosus L. | 2714 images |
| Asplenium adiantum-nigrum L. | 1427 images |
| Asplenium exiguum Bedd. | 21 images |
| Asplenium monanthes L. | 18 images |
| Asplenium platyneuron (L.) Britton, Sterns & Poggenb. | 350 images |
| Asplenium resiliens Kunze | 11 images |
| Asplenium septentrionale (L.) Hoffm. | 398 images |
| Asplenium trichomanes L. | 5760 images |
| Asplenium vespertinum Maxon | 7 images |
| Asplenium viride Huds. | 564 images |
| Astragalus aequalis Clokey | 1 images |
| Astragalus agnicidus Barneby | 2 images |
| Astragalus alpinus L. | 339 images |
| Astragalus beatleyae Barneby | 3 images |
| Astragalus brauntonii Parish | 5 images |
| Astragalus canadensis L. | 42 images |
| Astragalus cicer L. | 338 images |
| Astragalus clevelandii Greene | 2 images |
| Astragalus coccineus (Parry) Brandegee | 13 images |
| Astragalus crassicarpus Nutt. | 68 images |
| Astragalus gibbsii Kellogg | 11 images |
| Astragalus johannis-howellii Barneby | 17 images |
| Astragalus layneae Greene | 37 images |
| Astragalus magdalenae Greene | 21 images |
| Astragalus miguelensis Greene | 39 images |
| Astragalus missouriensis Nutt. | 40 images |
| Astragalus mollissimus Torr. | 57 images |
| Astragalus monoensis Barneby | 13 images |
| Astragalus nuttallianus DC. | 16 images |
| Astragalus pachypus Greene | 28 images |
| Astragalus pauperculus Greene | 2 images |
| Astragalus phoenix Barneby | 3 images |
| Astragalus pomonensis M.E.Jones | 4 images |
| Astragalus purshii Douglas ex G.Don | 9 images |
| Astragalus racemosus Pursh | 20 images |
| Astragalus shevockii Barneby | 4 images |
| Astragalus tenellus Pursh | 1 images |
| Astragalus traskiae Eastw. | 7 images |
| Athyrium filix-femina (L.) Roth | 3568 images |
| Athysanus pusillus (Hook.) Greene | 1 images |
| Atocion armeria (L.) Raf. | 2692 images |
| Atriplex argentea Nutt. | 3 images |
| Atriplex canescens (Pursh) Nutt. | 155 images |
| Atriplex fruticulosa Jeps. | 3 images |
| Atriplex glauca L. | 73 images |
| Atriplex hortensis L. | 1034 images |
| Atriplex lentiformis (Torr.) S.Watson | 12 images |
| Atriplex lindleyi Moq. | 6 images |
| Atriplex micrantha Ledeb. | 66 images |
| Atriplex muelleri Benth. | 5 images |
| Atriplex obovata Moq. | 5 images |
| Atriplex patula L. | 701 images |
| Atriplex polycarpa (Torr.) S.Watson | 6 images |
| Atriplex prostrata Boucher ex DC. | 1283 images |
| Atriplex rosea L. | 38 images |
| Atriplex semibaccata R.Br. | 95 images |
| Atriplex suberecta I.Verd. | 16 images |
| Atriplex undulata (Moq.) D.Dietr. | 14 images |
| Atriplex vesicaria Heward ex Benth. | 2 images |
| Aubrieta deltoidea (L.) DC. | 5398 images |
| Aurinia saxatilis (L.) Desv. | 2761 images |
| Avena barbata Pott ex Link | 1213 images |
| Avena fatua L. | 2470 images |
| Avena sativa L. | 3642 images |
| Avena sterilis L. | 248 images |
| Avena strigosa Schreb. | 24 images |
| Avenella flexuosa (L.) Drejer | 434 images |
| Avicennia marina (Forssk.) Vierh. | 190 images |
| Axonopus fissifolius (Raddi) Kuhlm. | 345 images |
| Ayenia compacta Rose | 42 images |
| Azolla filiculoides Lam. | 355 images |
| Baccharis douglasii DC. | 46 images |
| Baccharis pilularis DC. | 707 images |
| Baccharis salicifolia (Ruiz & Pav.) Pers. | 26 images |
| Baccharis salicina Torr. & A.Gray | 23 images |
| Baccharis sarothroides A.Gray | 49 images |
| Bacopa eisenii (Kellogg) Pennell | 3 images |
| Bacopa monnieri (L.) Wettst. | 196 images |
| Bacopa repens (Sw.) Wettst. | 126 images |
| Bacopa rotundifolia (Michx.) Wettst. | 6 images |
| Baileya multiradiata Harv. & A.Gray | 51 images |
| Baileya pleniradiata Harv. & A.Gray | 1 images |
| Balsamorhiza deltoidea Nutt. | 6 images |
| Balsamorhiza hookeri Nutt. | 44 images |
| Balsamorhiza incana Nutt. | 6 images |
| Baptisia australis (L.) R.Br. | 983 images |
| Barbarea orthoceras Ledeb. | 493 images |
| Barbarea verna (Mill.) Asch. | 1432 images |
| Barbarea vulgaris W.T.Aiton | 1019 images |
| Bassia hyssopifolia (Pall.) Kuntze | 33 images |
| Bassia scoparia (L.) A.J.Scott | 398 images |
| Batis maritima L. | 49 images |
| Bauhinia variegata L. | 2825 images |
| Bebbia juncea (Benth.) Greene | 63 images |
| Beckmannia syzigachne (Steud.) Fernald | 16 images |
| Bellardia trixago (L.) All. | 2661 images |
| Bellis perennis L. | 14493 images |
| Bensoniella oregona (Abrams & Bacig.) Morton | 2 images |
| Berberis aquifolium Pursh | 16030 images |
| Berberis darwinii Hook. | 1857 images |
| Berberis fremontii Torr. | 11 images |
| Berberis haematocarpa Wooton | 5 images |
| Berberis higginsiae Munz | 19 images |
| Berberis nervosa Pursh | 18 images |
| Berberis nevinii A.Gray | 2 images |
| Berberis pinnata Lag. | 11 images |
| Berberis repens Lindl. | 1697 images |
| Berberis trifoliolata Moric. | 164 images |
| Berberis wilcoxii Kearney | 1 images |
| Bergerocactus emoryi (Engelm.) Britton & Rose | 17 images |
| Berlandiera lyrata Benth. | 69 images |
| Berteroa incana (L.) DC. | 4607 images |
| Berula erecta (Huds.) Coville | 772 images |
| Beta vulgaris L. | 8752 images |
| Betula glandulosa Michx. | 7 images |
| Betula occidentalis Hook. | 40 images |
| Betula pumila L. | 8 images |
| Bidens alba (L.) DC. | 257 images |
| Bidens aurea (Aiton) Sherff | 1837 images |
| Bidens bipinnata L. | 1249 images |
| Bidens cernua L. | 469 images |
| Bidens frondosa L. | 2736 images |
| Bidens tripartita L. | 1092 images |
| Bidens vulgata Greene | 63 images |
| Billardiera heterophylla (Lindl.) L.W.Cayzer & Crisp | 91 images |
| Bistorta bistortoides (Pursh) Small | 1 images |
| Bistorta vivipara (L.) Delarbre | 1161 images |
| Blechnum spicant (L.) Roth | 1799 images |
| Blennosperma bakeri Heiser | 14 images |
| Blennosperma nanum (Hook.) S.F.Blake | 51 images |
| Blepharipappus scaber Hook. | 23 images |
| Blepharizonia laxa Greene | 16 images |
| Blepharizonia plumosa (Kellogg) Greene | 8 images |
| Bletia spicata (Walter) Sosa & M.W.Chase | 18 images |
| Bletia warnockii (Ames & Correll) Sosa & M.W.Chase | 13 images |
| Blitum capitatum L. | 200 images |
| Blitum virgatum L. | 119 images |
| Bloomeria crocea (Torr.) Coville | 50 images |
| Bloomeria humilis Hoover | 1 images |
| Boechera constancei (Rollins) Al-Shehbaz | 1 images |
| Boechera drummondii (A.Gray) Á.Löve & D.Löve | 3 images |
| Boechera hoffmannii (Munz) Al-Shehbaz | 5 images |
| Boechera johnstonii (Munz) Al-Shehbaz | 2 images |
| Boehmeria cylindrica (L.) Sw. | 563 images |
| Boehmeria nivea (L.) Gaudich. | 193 images |
| Boerhavia coccinea Mill. | 169 images |
| Boerhavia coulteri (Hook.f.) S.Watson | 6 images |
| Boerhavia erecta L. | 180 images |
| Boerhavia spicata Choisy | 3 images |
| Bolboschoenus fluviatilis (Torr.) Soják | 3 images |
| Bolboschoenus glaucus (Lam.) S.G.Sm. | 18 images |
| Bolboschoenus maritimus (L.) Palla | 711 images |
| Borago officinalis L. | 19003 images |
| Bothriochloa barbinodis (Lag.) Herter | 441 images |
| Bothriochloa ischaemum (L.) Keng | 518 images |
| Bothriochloa saccharoides (Sw.) Rydb. | 3 images |
| Botrychium lanceolatum (S.G.Gmel.) Ångstr. | 5 images |
| Botrychium lunaria (L.) Sw. | 484 images |
| Botrychium multifidum (S.G.Gmel.) Rupr. | 2 images |
| Botrychium simplex E.Hitchc. | 48 images |
| Botrychium virginianum (L.) Sw. | 215 images |
| Bouteloua aristidoides (Kunth) Griseb. | 3 images |
| Bouteloua barbata Lag. | 1 images |
| Bouteloua curtipendula (Michx.) Torr. | 114 images |
| Bouteloua gracilis (Kunth) Lag. ex Griffiths | 53 images |
| Bouteloua simplex Lag. | 10 images |
| Bouvardia ternifolia (Cav.) Schltdl. | 184 images |
| Bowlesia incana Ruiz & Pav. | 325 images |
| Boykinia occidentalis Torr. & A.Gray | 4 images |
| Boykinia rotundifolia Parry ex A.Gray | 2 images |
| Brachychiton populneus (Schott & Endl.) R.Br. | 3655 images |
| Brachypodium phoenicoides (L.) Roem. & Schult. | 139 images |
| Brachypodium pinnatum (L.) P.Beauv. | 389 images |
| Brasenia schreberi J.F.Gmel. | 4 images |
| Brassica elongata Ehrh. | 27 images |
| Brassica fruticulosa Cirillo | 211 images |
| Brassica juncea (L.) Czern. | 1314 images |
| Brassica napus L. | 9410 images |
| Brassica oleracea L. | 8277 images |
| Brassica rapa L. | 3711 images |
| Brewerimitella breweri (A.Gray) R.A.Folk & Y.Okuyama | 39 images |
| Brewerimitella ovalis (Greene) R.A.Folk & Y.Okuyama | 8 images |
| Brickellia californica (Torr. & A.Gray) A.Gray | 42 images |
| Brickellia coulteri A.Gray | 4 images |
| Brickellia desertorum Coville | 2 images |
| Brickellia eupatorioides (L.) Shinners | 77 images |
| Brickellia frutescens A.Gray | 1 images |
| Brickellia grandiflora (Hook.) Nutt. | 8 images |
| Brickellia longifolia S.Watson | 3 images |
| Brickellia microphylla (Nutt.) A.Gray | 2 images |
| Brickellia nevinii A.Gray | 2 images |
| Brickellia oblongifolia Nutt. | 3 images |
| Brickellia rusbyi A.Gray | 1 images |
| Brickellia venosa B.L.Rob. | 1 images |
| Briza maxima L. | 1821 images |
| Briza media L. | 901 images |
| Briza minor L. | 323 images |
| Brodiaea appendiculata Hoover | 13 images |
| Brodiaea coronaria (Salisb.) Jeps. | 17 images |
| Brodiaea elegans Hoover | 133 images |
| Brodiaea filifolia S.Watson | 2 images |
| Brodiaea jolonensis Eastw. | 15 images |
| Brodiaea kinkiensis Niehaus | 8 images |
| Brodiaea minor (Benth.) S.Watson | 8 images |
| Brodiaea orcuttii (Greene) Baker | 9 images |
| Brodiaea pallida Hoover | 7 images |
| Brodiaea stellaris S.Watson | 5 images |
| Brodiaea terrestris Kellogg | 51 images |
| Bromus arizonicus (Shear) Stebbins | 1 images |
| Bromus arvensis L. | 139 images |
| Bromus carinatus Hook. & Arn. | 28 images |
| Bromus catharticus Vahl | 399 images |
| Bromus cebadilla Steud. | 1 images |
| Bromus diandrus Roth | 1303 images |
| Bromus erectus Huds. | 964 images |
| Bromus hordeaceus L. | 2699 images |
| Bromus inermis Leyss. | 664 images |
| Bromus madritensis L. | 486 images |
| Bromus marginatus Nees ex Steud. | 1 images |
| Bromus racemosus L. | 183 images |
| Bromus rigidus Roth | 14 images |
| Bromus rubens L. | 348 images |
| Bromus scoparius L. | 12 images |
| Bromus secalinus L. | 229 images |
| Bromus sitchensis Trin. | 7 images |
| Bromus sterilis L. | 2631 images |
| Bromus suksdorfii Vasey | 6 images |
| Bromus tectorum L. | 389 images |
| Bromus vulgaris (Hook.) Shear | 1 images |
| Bryonia alba L. | 2371 images |
| Bryonia cretica L. | 7191 images |
| Buddleja davidii Franch. | 16475 images |
| Buddleja lindleyana Fortune | 88 images |
| Buddleja saligna Willd. | 40 images |
| Buddleja scordioides Kunth | 7 images |
| Buddleja sessiliflora Kunth | 25 images |
| Buddleja utahensis Coville | 3 images |
| Buglossoides arvensis (L.) I.M.Johnst. | 1124 images |
| Bulbostylis capillaris (L.) Kunth ex C.B.Clarke | 2 images |
| Bupleurum lancifolium Hornem. | 27 images |
| Bupleurum rotundifolium L. | 460 images |
| Bursera fagaroides (Kunth) Engl. | 36 images |
| Bursera microphylla A.Gray | 7 images |
| Cacaliopsis nardosmia (A.Gray) A.Gray | 11 images |
| Caesalpinia pulcherrima (L.) Sw. | 3081 images |
| Cakile edentula (Bigelow) Hook. | 232 images |
| Cakile maritima Scop. | 5968 images |
| Calamagrostis arenaria (L.) Roth | 1585 images |
| Calamagrostis breviligulata (Fernald) Saarela | 49 images |
| Calamagrostis canadensis (Michx.) P.Beauv. | 3 images |
| Calamagrostis koelerioides Vasey | 2 images |
| Calamagrostis purpurea (Trin.) Trin. | 22 images |
| Calamagrostis stricta (Timm) Koeler | 26 images |
| Calandrinia ciliata (Ruiz & Pav.) DC. | 28 images |
| Calendula arvensis L. | 6216 images |
| Calendula officinalis L. | 15077 images |
| Calibrachoa parviflora (Juss.) D'Arcy | 2315 images |
| Calliandra eriophylla Benth. | 216 images |
| Calliandra haematocephala Hassk. | 649 images |
| Calliandra humilis Benth. | 3 images |
| Callirhoe involucrata (Torr. & A.Gray) A.Gray | 44 images |
| Callitriche fassettii Schotsman | 2 images |
| Callitriche hermaphroditica L. | 7 images |
| Callitriche heterophylla Pursh | 3 images |
| Callitriche marginata Torr. | 8 images |
| Callitriche palustris L. | 379 images |
| Callitriche stagnalis Scop. | 619 images |
| Callitropsis nootkatensis (D.Don) Oerst. | 505 images |
| Calocedrus decurrens (Torr.) Florin | 3051 images |
| Calochortus albus (Benth.) Douglas ex Benth. | 32 images |
| Calochortus amabilis Purdy | 60 images |
| Calochortus amoenus Greene | 8 images |
| Calochortus aureus S.Watson | 31 images |
| Calochortus bruneaunis A.Nelson & J.F.Macbr. | 46 images |
| Calochortus catalinae S.Watson | 63 images |
| Calochortus clavatus S.Watson | 50 images |
| Calochortus coeruleus (Kellogg) S.Watson | 15 images |
| Calochortus concolor (Baker) Purdy & L.H.Bailey | 19 images |
| Calochortus dunnii Purdy | 7 images |
| Calochortus elegans Pursh | 17 images |
| Calochortus eurycarpus S.Watson | 28 images |
| Calochortus excavatus Greene | 18 images |
| Calochortus flexuosus S.Watson | 47 images |
| Calochortus greenei S.Watson | 10 images |
| Calochortus gunnisonii S.Watson | 70 images |
| Calochortus invenustus Greene | 84 images |
| Calochortus kennedyi Porter | 104 images |
| Calochortus leichtlinii Hook.f. | 147 images |
| Calochortus longibarbatus S.Watson | 11 images |
| Calochortus luteus Douglas ex Lindl. | 186 images |
| Calochortus macrocarpus Douglas | 72 images |
| Calochortus minimus Ownbey | 30 images |
| Calochortus monophyllus (Lindl.) Lem. | 51 images |
| Calochortus nudus S.Watson | 23 images |
| Calochortus nuttallii Torr. | 47 images |
| Calochortus obispoensis Lemmon | 17 images |
| Calochortus palmeri S.Watson | 29 images |
| Calochortus panamintensis (Ownbey) Reveal | 1 images |
| Calochortus persistens Ownbey | 16 images |
| Calochortus plummerae Greene | 68 images |
| Calochortus simulans (Hoover) Munz | 7 images |
| Calochortus splendens Douglas ex Benth. | 134 images |
| Calochortus striatus Parish | 29 images |
| Calochortus superbus Purdy ex Howell | 26 images |
| Calochortus syntrophus Callahan | 3 images |
| Calochortus tolmiei Hook. & Arn. | 137 images |
| Calochortus umbellatus Alph.Wood | 47 images |
| Calochortus uniflorus Hook. & Arn. | 58 images |
| Calochortus venustus Douglas ex Benth. | 146 images |
| Calochortus vestae (Purdy) Wallace | 14 images |
| Calochortus weedii Alph.Wood | 50 images |
| Calochortus westonii Eastw. | 3 images |
| Calotropis procera (Aiton) W.T.Aiton | 863 images |
| Caltha leptosepala DC. | 142 images |
| Calycadenia mollis A.Gray | 5 images |
| Calycadenia multiglandulosa DC. | 25 images |
| Calycadenia pauciflora A.Gray | 2 images |
| Calycadenia truncata DC. | 15 images |
| Calycanthus occidentalis Hook. & Arn. | 52 images |
| Calycoseris parryi A.Gray | 17 images |
| Calycoseris wrightii A.Gray | 20 images |
| Calypso bulbosa (L.) Oakes | 426 images |
| Calyptridium monandrum Nutt. | 43 images |
| Calyptridium monospermum Greene | 51 images |
| Calyptridium pulchellum (Eastw.) Hoover | 1 images |
| Calyptridium umbellatum (Torr.) Greene | 90 images |
| Calystegia atriplicifolia Hallier f. | 6 images |
| Calystegia collina (Greene) Brummitt | 35 images |
| Calystegia longipes (S.Watson) Brummitt | 28 images |
| Calystegia macrostegia (Greene) Brummitt | 131 images |
| Calystegia malacophylla (Greene) Munz | 23 images |
| Calystegia occidentalis (A.Gray) Brummitt | 34 images |
| Calystegia peirsonii (Abrams) Brummitt | 2 images |
| Calystegia purpurata (Greene) Brummitt | 81 images |
| Calystegia sepium (L.) R.Br. | 9350 images |
| Calystegia silvatica (Kit.) Griseb. | 1418 images |
| Calystegia soldanella (L.) R.Br. | 1769 images |
| Camassia leichtlinii (Baker) S.Watson | 736 images |
| Camassia quamash (Pursh) Greene | 773 images |
| Camelina alyssum (Mill.) Thell. | 3 images |
| Camelina microcarpa Andrz. ex DC. | 99 images |
| Camelina rumelica Velen. | 17 images |
| Camissonia kernensis (Munz) P.H.Raven | 9 images |
| Camissoniopsis hirtella (Greene) W.L.Wagner & Hoch | 1 images |
| Campanula glomerata L. | 7118 images |
| Campanula latifolia L. | 1431 images |
| Campanula persicifolia L. | 8937 images |
| Campanula rapunculoides L. | 4756 images |
| Campanula scabrella Engelm. | 8 images |
| Campanula shetleri Heckard | 1 images |
| Campsis radicans (L.) Bureau | 6688 images |
| Canavalia ensiformis (L.) DC. | 45 images |
| Cannabis sativa L. | 5314 images |
| Canotia holacantha Torr. | 6 images |
| Capsella bursa-pastoris (L.) Medik. | 9730 images |
| Caragana arborescens Lam. | 1587 images |
| Cardamine angulata Hook. | 8 images |
| Cardamine bellidifolia L. | 27 images |
| Cardamine californica (Nutt.) Greene | 6 images |
| Cardamine flexuosa With. | 5304 images |
| Cardamine hirsuta L. | 3987 images |
| Cardamine nuttallii Greene | 55 images |
| Cardamine oligosperma Nutt. | 52 images |
| Cardamine pensylvanica Muhl. ex Willd. | 4 images |
| Cardionema ramosissima (Weinm.) A.Nelson & J.F.Macbr. | 9 images |
| Carduus acanthoides L. | 3278 images |
| Carduus nutans L. | 4382 images |
| Carduus pycnocephalus L. | 4363 images |
| Carduus tenuiflorus Curtis | 1261 images |
| Carex amplifolia Boott | 1 images |
| Carex aquatilis Wahlenb. | 19 images |
| Carex arcta Boott | 6 images |
| Carex atherodes Spreng. | 5 images |
| Carex aurea Nutt. | 14 images |
| Carex barbarae Dewey | 6 images |
| Carex breweri Boott | 16 images |
| Carex brunnescens (Pers.) Poir. | 41 images |
| Carex buxbaumii Wahlenb. | 71 images |
| Carex canescens L. | 124 images |
| Carex capillaris L. | 51 images |
| Carex capitata Sol. | 1 images |
| Carex comosa Boott | 41 images |
| Carex diandra Schrank | 75 images |
| Carex disperma Dewey | 3 images |
| Carex ebenea Rydb. | 1 images |
| Carex echinata Murray | 262 images |
| Carex emoryi Dewey | 8 images |
| Carex filifolia Nutt. | 8 images |
| Carex garberi Fernald | 1 images |
| Carex globosa Boott | 6 images |
| Carex gracilior Mack. | 1 images |
| Carex harfordii Mack. | 4 images |
| Carex hoodii Boott | 3 images |
| Carex hystericina Muhl. ex Willd. | 30 images |
| Carex inops L.H.Bailey | 1 images |
| Carex lachenalii Schkuhr | 46 images |
| Carex laeviculmis Meinsh. | 3 images |
| Carex lasiocarpa Ehrh. | 51 images |
| Carex leporina L. | 250 images |
| Carex leporinella Mack. | 1 images |
| Carex leptopoda Mack. | 4 images |
| Carex limosa L. | 113 images |
| Carex livida (Wahlenb.) Willd. | 6 images |
| Carex longii Mack. | 13 images |
| Carex luzulina Olney | 8 images |
| Carex lyngbyei Hornem. | 8 images |
| Carex magellanica Lam. | 67 images |
| Carex meadii Dewey | 6 images |
| Carex mertensii J.D.Prescott ex Bong. | 5 images |
| Carex mesochorea Mack. | 2 images |
| Carex microdonta Torr. | 1 images |
| Carex microglochin Wahlenb. | 77 images |
| Carex microptera Mack. | 5 images |
| Carex molesta Mack. | 3 images |
| Carex myosuroides Vill. | 41 images |
| Carex obtusata Lilj. | 5 images |
| Carex oederi Retz. | 290 images |
| Carex paysonis Clokey | 4 images |
| Carex pendula Huds. | 4265 images |
| Carex phaeocephala Piper | 1 images |
| Carex praticola Rydb. | 1 images |
| Carex raynoldsii Dewey | 1 images |
| Carex retrorsa Schwein. | 4 images |
| Carex rupestris All. | 51 images |
| Carex sartwellii Dewey | 4 images |
| Carex scirpoidea Michx. | 2 images |
| Carex simpliciuscula Wahlenb. | 10 images |
| Carex spectabilis Dewey | 5 images |
| Carex stipata Muhl. ex Willd. | 54 images |
| Carex subbracteata Mack. | 3 images |
| Carex tumulicola Mack. | 2 images |
| Carex utriculata Boott | 8 images |
| Carex vallicola Dewey | 2 images |
| Carex vesicaria L. | 285 images |
| Carex vulpinoidea Michx. | 110 images |
| Carissa macrocarpa (Eckl.) A.DC. | 2694 images |
| Carlowrightia arizonica A.Gray | 29 images |
| Carminatia tenuiflora DC. | 5 images |
| Carnegiea gigantea (Engelm.) Britton & Rose | 267 images |
| Caroxylon vermiculatum (L.) Akhani & Roalson | 503 images |
| Carpenteria californica Torr. | 121 images |
| Carphochaete bigelovii A.Gray | 6 images |
| Carpobrotus chilensis (Molina) N.E.Br. | 60 images |
| Carpobrotus edulis (L.) N.E.Br. | 6498 images |
| Carrichtera annua (L.) DC. | 241 images |
| Carthamus lanatus L. | 1535 images |
| Carthamus tinctorius L. | 922 images |
| Carum carvi L. | 1221 images |
| Cassiope mertensiana (Bong.) G.Don | 17 images |
| Castela emoryi (A.Gray) Moran & Felger | 4 images |
| Castilleja affinis Hook. & Arn. | 44 images |
| Castilleja ambigua Hook. & Arn. | 1 images |
| Castilleja angustifolia (Nutt.) G.Don | 7 images |
| Castilleja applegatei Fernald | 306 images |
| Castilleja arachnoidea Greenm. | 38 images |
| Castilleja attenuata (A.Gray) T.I.Chuang & Heckard | 4 images |
| Castilleja campestris (Benth.) T.I.Chuang & Heckard | 1 images |
| Castilleja cusickii Greenm. | 17 images |
| Castilleja exserta (A.Heller) T.I.Chuang & Heckard | 27 images |
| Castilleja foliolosa Hook. & Arn. | 2 images |
| Castilleja grisea Dunkle | 3 images |
| Castilleja integra A.Gray | 4 images |
| Castilleja linariifolia Benth. | 89 images |
| Castilleja mendocinensis (Eastw.) Pennell | 30 images |
| Castilleja miniata Douglas ex Benth. | 360 images |
| Castilleja minor (A.Gray) A.Gray | 38 images |
| Castilleja mollis Pennell | 8 images |
| Castilleja nana Eastw. | 65 images |
| Castilleja nervata Eastw. | 36 images |
| Castilleja occidentalis Torr. | 14 images |
| Castilleja patriotica Fernald | 11 images |
| Castilleja peckiana Pennell | 4 images |
| Castilleja pruinosa Fernald | 15 images |
| Castilleja pulchella Rydb. | 1 images |
| Castilleja rhexiifolia Rydb. | 11 images |
| Castilleja scabrida Eastw. | 6 images |
| Castilleja schizotricha Greenm. | 2 images |
| Castilleja septentrionalis Lindl. | 26 images |
| Castilleja sessiliflora Pursh | 14 images |
| Castilleja subinclusa Greene | 40 images |
| Castilleja tenuiflora Benth. | 96 images |
| Catabrosa aquatica (L.) P.Beauv. | 71 images |
| Catalpa speciosa Teas | 454 images |
| Catharanthus roseus (L.) G.Don | 9956 images |
| Ceanothus arboreus Greene | 2212 images |
| Ceanothus cordulatus Kellogg | 56 images |
| Ceanothus crassifolius Torr. | 82 images |
| Ceanothus cuneatus (Hook.) Nutt. | 162 images |
| Ceanothus cyaneus Eastw. | 5 images |
| Ceanothus diversifolius Kellogg | 9 images |
| Ceanothus fendleri A.Gray | 3 images |
| Ceanothus ferrisiae McMinn | 1 images |
| Ceanothus foliosus Parry | 12 images |
| Ceanothus fresnensis Dudley ex Abrams | 15 images |
| Ceanothus gloriosus J.T.Howell | 5 images |
| Ceanothus impressus Trel. | 1382 images |
| Ceanothus integerrimus Hook. & Arn. | 12 images |
| Ceanothus jepsonii Greene | 25 images |
| Ceanothus lemmonii Parry | 12 images |
| Ceanothus leucodermis Greene | 39 images |
| Ceanothus maritimus Hoover | 10 images |
| Ceanothus megacarpus Nutt. | 48 images |
| Ceanothus oliganthus Nutt. | 42 images |
| Ceanothus palmeri Trel. | 2 images |
| Ceanothus parryi Trel. | 8 images |
| Ceanothus prostratus Benth. | 89 images |
| Ceanothus purpureus Jeps. | 4 images |
| Ceanothus sanguineus Pursh | 14 images |
| Ceanothus spinosus Nutt. | 36 images |
| Ceanothus thyrsiflorus Eschw. | 4013 images |
| Ceanothus tomentosus Parry | 74 images |
| Ceanothus velutinus Douglas ex Hook. | 100 images |
| Ceanothus verrucosus Nutt. | 3 images |
| Cedronella canariensis (L.) Webb & Berthel. | 118 images |
| Celosia argentea L. | 9621 images |
| Celtis pallida Torr. | 19 images |
| Cenchrus × cupreus (Thorpe) Govaerts | 8 images |
| Cenchrus americanus (L.) Morrone | 115 images |
| Cenchrus caudatus (Schrad.) Kuntze | 49 images |
| Cenchrus ciliaris L. | 481 images |
| Cenchrus clandestinus (Hochst. ex Chiov.) Morrone | 141 images |
| Cenchrus echinatus L. | 123 images |
| Cenchrus latifolius (Spreng.) Morrone | 8 images |
| Cenchrus longisetus M.C.Johnst. | 992 images |
| Cenchrus longispinus (Hack.) Fernald | 80 images |
| Cenchrus nervosus (Nees) Kuntze | 1 images |
| Cenchrus purpureus (Schumach.) Morrone | 438 images |
| Cenchrus setaceus (Forssk.) Morrone | 2660 images |
| Cenchrus spinifex Cav. | 30 images |
| Centaurea × gerstlaueri Erdner | 1 images |
| Centaurea benedicta (L.) L. | 338 images |
| Centaurea calcitrapa L. | 1658 images |
| Centaurea cyanus L. | 15919 images |
| Centaurea depressa M.Bieb. | 10 images |
| Centaurea diffusa Lam. | 192 images |
| Centaurea diluta Aiton | 27 images |
| Centaurea iberica Trevir. ex Spreng. | 52 images |
| Centaurea jacea L. | 13826 images |
| Centaurea melitensis L. | 760 images |
| Centaurea montana L. | 8918 images |
| Centaurea nigra L. | 7774 images |
| Centaurea nigrescens Willd. | 699 images |
| Centaurea scabiosa L. | 8047 images |
| Centaurea solstitialis L. | 1247 images |
| Centaurea stoebe L. | 751 images |
| Centaurea sulphurea Willd. | 29 images |
| Centaurea virgata Lam. | 31 images |
| Centaurium erythraea Rafn | 7176 images |
| Centaurium tenuiflorum (Hoffmanns. & Link) Fritsch | 184 images |
| Centromadia parryi (Greene) Greene | 17 images |
| Centromadia pungens Greene | 3 images |
| Cephalanthera austiniae (A.Gray) A.Heller | 69 images |
| Cephalanthus occidentalis L. | 1231 images |
| Cerastium beeringianum Cham. & Schltdl. | 1 images |
| Cerastium dichotomum L. | 11 images |
| Cerastium diffusum Pers. | 142 images |
| Cerastium glomeratum Thuill. | 4543 images |
| Cerastium holosteoides Fr. | 10 images |
| Cerastium nutans Raf. | 7 images |
| Ceratophyllum demersum L. | 295 images |
| Ceratopteris thalictroides (L.) Brongn. | 40 images |
| Cercis occidentalis Torr. ex A.Gray | 124 images |
| Cercocarpus ledifolius Nutt. | 20 images |
| Cercocarpus montanus Raf. | 186 images |
| Cestrum fasciculatum (Schltdl.) Miers | 4 images |
| Cevallia sinuata Lag. | 8 images |
| Chaenactis artemisiifolia A.Gray | 13 images |
| Chaenactis carphoclinia A.Gray | 26 images |
| Chaenactis fremontii A.Gray | 53 images |
| Chaenactis glabriuscula DC. | 130 images |
| Chaenactis nevadensis A.Gray | 4 images |
| Chaenactis parishii A.Gray | 5 images |
| Chaenactis santolinoides Greene | 19 images |
| Chaenactis stevioides Hook. & Arn. | 64 images |
| Chaenactis suffrutescens A.Gray | 8 images |
| Chaenactis xantiana A.Gray | 11 images |
| Chaerophyllum tainturieri Hook. & Arn. | 210 images |
| Chaetadelpha wheeleri A.Gray ex S.Watson | 7 images |
| Chamaebatia foliolosa Benth. | 39 images |
| Chamaebatiaria millefolium (Torr.) Maxim. | 78 images |
| Chamaechaenactis scaposa Rydb. | 4 images |
| Chamaecrista absus (L.) H.S.Irwin & Barneby | 3 images |
| Chamaecrista nictitans (L.) Moench | 209 images |
| Chamaecrista serpens (L.) Greene | 3 images |
| Chamaecyparis lawsoniana (A.Murray bis) Parl. | 5505 images |
| Chamaecytisus prolifer (L.f.) Link | 255 images |
| Chamaemelum fuscatum (Brot.) Vasc. | 102 images |
| Chamaemelum nobile (L.) All. | 2565 images |
| Chamaerhodos erecta (L.) Bunge | 1 images |
| Chamelaucium uncinatum Schauer | 733 images |
| Chasmanthe bicolor (Gasp.) N.E.Br. | 22 images |
| Chasmanthe floribunda (Salisb.) N.E.Br. | 76 images |
| Chasmanthium latifolium (Michx.) H.O.Yates | 399 images |
| Chelidonium majus L. | 25450 images |
| Chenopodiastrum murale (L.) S.Fuentes, Uotila & Borsch | 1382 images |
| Chenopodium album L. | 14588 images |
| Chenopodium berlandieri Moq. | 46 images |
| Chenopodium betaceum Andrz. | 5 images |
| Chenopodium ficifolium Sm. | 1325 images |
| Chenopodium pratericola Rydb. | 17 images |
| Chenopodium vulvaria L. | 783 images |
| Cherleria obtusiloba (Rydb.) A.J.Moore & Dillenb. | 16 images |
| Chilopsis linearis (Cav.) Sweet | 399 images |
| Chimaphila maculata (L.) Pursh | 750 images |
| Chimaphila umbellata (L.) W.P.C.Barton | 120 images |
| Chloracantha spinosa (Benth.) G.L.Nesom | 5 images |
| Chloris barbata Sw. | 255 images |
| Chloris cucullata Bisch. | 5 images |
| Chloris gayana Kunth | 119 images |
| Chloris truncata R.Br. | 6 images |
| Chloris verticillata Nutt. | 31 images |
| Chloris virgata Sw. | 65 images |
| Chlorogalum angustifolium Kellogg | 3 images |
| Chlorogalum pomeridianum (DC.) Kunth | 237 images |
| Chloropyron palmatum (Ferris) Tank & J.M.Egger | 6 images |
| Choisya dumosa (Torr. & A.Gray) A.Gray | 36 images |
| Chondrilla juncea L. | 1900 images |
| Chorispora tenella (Pall.) DC. | 218 images |
| Chorizanthe angustifolia Nutt. | 2 images |
| Chorizanthe biloba Goodman | 1 images |
| Chorizanthe blakleyi Hardham | 1 images |
| Chorizanthe brevicornu Torr. | 28 images |
| Chorizanthe diffusa Benth. | 2 images |
| Chorizanthe douglasii Benth. | 21 images |
| Chorizanthe fimbriata Nutt. | 32 images |
| Chorizanthe howellii Goodman | 3 images |
| Chorizanthe membranacea Benth. | 30 images |
| Chorizanthe orcuttiana Parry | 23 images |
| Chorizanthe procumbens Nutt. | 20 images |
| Chorizanthe pungens Benth. | 20 images |
| Chorizanthe robusta Parry | 2 images |
| Chorizanthe staticoides Benth. | 57 images |
| Chrysolepis chrysophylla (Douglas ex Hook.) Hjelmq. | 24 images |
| Chrysolepis sempervirens (Kellogg) Hjelmq. | 26 images |
| Chrysosplenium glechomifolium Nutt. | 1 images |
| Chylismia brevipes (A.Gray) Small | 35 images |
| Chylismia cardiophylla (Torr.) Small | 5 images |
| Cicendia quadrangularis (Lam.) Griseb. | 5 images |
| Cichorium intybus L. | 19251 images |
| Cicuta douglasii (DC.) J.M.Coult. & Rose | 1 images |
| Cicuta maculata L. | 310 images |
| Circaea alpina L. | 253 images |
| Cirsium andersonii Petr. | 35 images |
| Cirsium andrewsii Jeps. | 4 images |
| Cirsium arizonicum (A.Gray) Petr. | 10 images |
| Cirsium arvense (L.) Scop. | 15258 images |
| Cirsium brevistylum Cronquist | 66 images |
| Cirsium douglasii DC. | 14 images |
| Cirsium eatonii B.L.Rob. | 7 images |
| Cirsium fontinale Jeps. | 17 images |
| Cirsium hydrophilum Jeps. | 26 images |
| Cirsium mohavense (Greene) Petr. | 9 images |
| Cirsium occidentale (Nutt.) Jeps. | 103 images |
| Cirsium ochrocentrum A.Gray | 4 images |
| Cirsium parryi Petr. | 5 images |
| Cirsium remotifolium DC. | 7 images |
| Cirsium scariosum Nutt. | 7 images |
| Cirsium undulatum Spreng. | 121 images |
| Cirsium vulgare (Savi) Ten. | 19782 images |
| Cissus trifoliata (L.) L. | 10 images |
| Cistus × incanus L. | 10 images |
| Cistus creticus L. | 2725 images |
| Cistus inflatus Pourr. ex J.-P.Demoly | 64 images |
| Cistus ladanifer L. | 3344 images |
| Cistus monspeliensis L. | 5226 images |
| Cistus salviifolius L. | 9119 images |
| Citrullus colocynthis (L.) Schrad. | 423 images |
| Citrullus lanatus (Thunb.) Matsum. & Nakai | 2224 images |
| Citrus japonica Thunb. | 1455 images |
| Cladium mariscus (L.) Pohl | 285 images |
| Clarkia amoena (Lehm.) A.Nelson & J.F.Macbr. | 1143 images |
| Clarkia concinna (Fisch. & C.A.Mey.) Greene | 5 images |
| Clarkia modesta Jeps. | 11 images |
| Clarkia purpurea (Curtis) A.Nelson & J.F.Macbr. | 8 images |
| Clarkia rhomboidea Douglas | 62 images |
| Clarkia rubicunda (Lindl.) F.H.Lewis & M.E.Lewis | 3 images |
| Clarkia springvillensis Vasek | 4 images |
| Clarkia tembloriensis Vasek | 4 images |
| Clarkia unguiculata Lindl. | 940 images |
| Clarkia virgata Greene | 1 images |
| Claytonia lanceolata Pursh | 34 images |
| Claytonia megarhiza (A.Gray) Parry ex S.Watson | 4 images |
| Claytonia parviflora Douglas | 49 images |
| Claytonia perfoliata Donn ex Willd. | 3323 images |
| Claytonia rosea Rydb. | 9 images |
| Claytonia rubra (Howell) Tidestr. | 68 images |
| Claytonia saxosa Brandegee | 2 images |
| Claytonia sibirica L. | 978 images |
| Clematis columbiana (Nutt.) Torr. & A.Gray | 3 images |
| Clematis hirsutissima Pursh | 33 images |
| Clematis lasiantha Nutt. | 181 images |
| Clematis ligusticifolia Nutt. | 88 images |
| Clematis occidentalis (Hornem.) DC. | 50 images |
| Clematis orientalis L. | 79 images |
| Clematis pauciflora Nutt. | 34 images |
| Cleome dodecandra L. | 139 images |
| Cleomella arborea (Nutt.) Roalson & J.C.Hall | 127 images |
| Cleomella lutea (Hook.) Roalson & J.C.Hall | 18 images |
| Cleomella platycarpa (Torr.) Roalson & J.C.Hall | 5 images |
| Cleomella refracta (Engelm.) J.C.Hall & Roalson | 2 images |
| Cleomella serrulata (Pursh) Roalson & J.C.Hall | 71 images |
| Clinopodium brownei (Sw.) Kuntze | 24 images |
| Clinopodium menthifolium (Host) Merino | 35 images |
| Clinopodium mimuloides (Benth.) Kuntze | 2 images |
| Clinopodium vulgare L. | 7334 images |
| Clintonia andrewsiana Torr. | 78 images |
| Clintonia uniflora (Menzies ex Schult. & Schult.f.) Kunth | 7 images |
| Clitoria mariana L. | 128 images |
| Cnidoscolus angustidens Torr. | 45 images |
| Cocculus diversifolius DC. | 1 images |
| Cochemiea dioica (K.Brandegee) Doweld | 1 images |
| Cochemiea grahamii (Engelm.) Doweld | 203 images |
| Cochemiea tetrancistra (Engelm.) P.B.Breslin & Majure | 121 images |
| Cochemiea thornberi (Orcutt) P.B.Breslin & Majure | 135 images |
| Cochemiea viridiflora (Britton & Rose) P.B.Breslin & Majure | 1 images |
| Cochemiea wrightii (Engelm.) Doweld | 171 images |
| Cochlearia groenlandica L. | 11 images |
| Coincya tournefortii (Gouan) Alcaraz, T.E.Díaz, Rivas Mart. & Sánchez-Gómez | 342 images |
| Colchicum autumnale L. | 6216 images |
| Coleogyne ramosissima Torr. | 47 images |
| Collinsia bartsiifolia Benth. | 50 images |
| Collinsia concolor Greene | 29 images |
| Collinsia corymbosa Herder | 8 images |
| Collinsia grandiflora Douglas ex Lindl. | 4 images |
| Collinsia heterophylla Buist ex Graham | 5 images |
| Collinsia parviflora Douglas ex Lindl. | 41 images |
| Collinsia tinctoria Hartw. ex Benth. | 57 images |
| Collomia diversifolia Greene | 8 images |
| Collomia grandiflora Douglas ex Lindl. | 303 images |
| Collomia heterophylla Hook. | 9 images |
| Collomia linearis Nutt. | 35 images |
| Collomia rawsoniana Greene | 1 images |
| Collomia tinctoria Kellogg | 5 images |
| Collomia tracyi R.Mason | 1 images |
| Cologania angustifolia Kunth | 9 images |
| Cologania obovata Schltdl. | 7 images |
| Colutea arborescens L. | 3266 images |
| Comandra umbellata (L.) Nutt. | 87 images |
| Comarostaphylis diversifolia (Parry) Greene | 61 images |
| Comarum palustre L. | 1003 images |
| Comastoma tenellum (Rottb.) Toyok. | 78 images |
| Commelina benghalensis L. | 752 images |
| Commelina dianthifolia Redouté | 15 images |
| Commelina erecta L. | 1770 images |
| Condalia warnockii M.C.Johnst. | 3 images |
| Condea emoryi (Torr.) Harley & J.F.B.Pastore | 65 images |
| Conicosia pugioniformis (L.) N.E.Br. | 8 images |
| Conioselinum scopulorum (A.Gray) J.M.Coult. & Rose | 20 images |
| Conium maculatum L. | 7641 images |
| Conoclinium dissectum A.Gray | 1 images |
| Conopholis alpina Liebm. | 52 images |
| Conringia orientalis (L.) C.Presl | 2 images |
| Convallaria majalis L. | 7171 images |
| Convolvulus althaeoides L. | 3671 images |
| Convolvulus arvensis L. | 16234 images |
| Convolvulus equitans Benth. | 143 images |
| Corallorhiza maculata Raf. | 311 images |
| Corallorhiza mertensiana Bong. | 113 images |
| Corallorhiza striata Lindl. | 132 images |
| Corallorhiza trifida Châtel. | 159 images |
| Corallorhiza wisteriana Conrad | 33 images |
| Corchorus hirtus L. | 21 images |
| Cordia parvifolia A.DC. | 4 images |
| Cordylanthus parviflorus (Ferris) Wiggins | 15 images |
| Cordylanthus rigidus (Benth.) Jeps. | 37 images |
| Coreocarpus arizonicus S.F.Blake | 3 images |
| Coreopsis californica (Nutt.) H.Sharsm. | 8 images |
| Coreopsis gigantea (Kellogg) H.M.Hall | 26 images |
| Coreopsis maritima Hook.f. | 32 images |
| Coreopsis tinctoria Nutt. | 3047 images |
| Corethrogyne filaginifolia (Hook. & Arn.) Nutt. | 138 images |
| Coriandrum sativum L. | 3130 images |
| Corispermum americanum (Nutt.) Nutt. | 2 images |
| Cornus glabrata Benth. | 8 images |
| Cornus nuttallii Audubon ex Torr. & A.Gray | 108 images |
| Cornus sericea L. | 7027 images |
| Cornus unalaschkensis Ledeb. | 6 images |
| Coronilla varia L. | 8731 images |
| Cortaderia jubata (Lemoine) Stapf | 1 images |
| Cortaderia selloana (Schult. & Schult.f.) Asch. & Graebn. | 4002 images |
| Corydalis aurea Willd. | 95 images |
| Corydalis caseana A.Gray | 20 images |
| Corylus cornuta Marshall | 1154 images |
| Corymbia citriodora (Hook.) K.D.Hill & L.A.S.Johnson | 164 images |
| Coryphantha recurvata (Engelm.) Britton & Rose | 2 images |
| Cosmos bipinnatus Cav. | 12884 images |
| Cosmos parviflorus (Jacq.) Pers. | 30 images |
| Cosmos sulphureus Cav. | 3939 images |
| Cota tinctoria (L.) J.Gay | 1831 images |
| Cotinus coggygria Scop. | 13022 images |
| Cotoneaster coriaceus Franch. | 5848 images |
| Cotoneaster franchetii Bois | 3806 images |
| Cotoneaster frigidus Wall. ex Lindl. | 395 images |
| Cotoneaster horizontalis Decne. | 5562 images |
| Cotoneaster integrifolius (Roxb.) G.Klotz | 102 images |
| Cotoneaster pannosus Franch. | 949 images |
| Cotoneaster simonsii Baker | 61 images |
| Cotula australis Hook.f. | 220 images |
| Cotula coronopifolia L. | 486 images |
| Cotyledon orbiculata L. | 4137 images |
| Coursetia caribaea (Jacq.) Lavin | 48 images |
| Crassula aquatica (L.) Schönland | 7 images |
| Crassula connata (Ruiz & Pav.) A.Berger | 4 images |
| Crassula multicava Lem. | 2573 images |
| Crassula ovata (Mill.) Druce | 21372 images |
| Crassula tetragona L. | 477 images |
| Crassula tillaea Lest.-Garl. | 533 images |
| Crataegus chrysocarpa Ashe | 6 images |
| Crataegus douglasii Lindl. | 381 images |
| Crataegus macracantha Lodd. ex Loudon | 7 images |
| Crataegus monogyna Jacq. | 24928 images |
| Crepis acuminata Nutt. | 42 images |
| Crepis bursifolia L. | 1848 images |
| Crepis capillaris (L.) Wallr. | 9044 images |
| Crepis intermedia A.Gray | 3 images |
| Crepis modocensis Greene | 6 images |
| Crepis monticola Coville | 2 images |
| Crepis occidentalis Nutt. | 45 images |
| Crepis pleurocarpa A.Gray | 2 images |
| Crepis rubra L. | 447 images |
| Crepis setosa Haller f. | 2363 images |
| Crepis tectorum L. | 249 images |
| Crepis vesicaria L. | 3224 images |
| Cressa truxillensis Kunth | 19 images |
| Crocanthemum scoparium (Nutt.) Millsp. | 15 images |
| Crocidium multicaule Hook. | 19 images |
| Crocus flavus Weston | 1132 images |
| Crossosoma californicum Nutt. | 2 images |
| Crotalaria pumila Ortega | 65 images |
| Crotalaria sagittalis L. | 55 images |
| Croton ciliatoglandulifer Ortega | 28 images |
| Croton monanthogynus Michx. | 106 images |
| Croton setiger Hook. | 238 images |
| Croton sonorae Torr. | 2 images |
| Crucianella angustifolia L. | 112 images |
| Crupina vulgaris Pers. ex Cass. | 86 images |
| Cryptantha clevelandii Greene | 38 images |
| Cryptantha crinita Greene | 7 images |
| Cryptantha flaccida (Douglas ex Lehm.) Greene | 8 images |
| Cryptantha minima Rydb. | 7 images |
| Cryptantha nemaclada Greene | 1 images |
| Cryptantha pterocarya (Torr.) Greene | 39 images |
| Cucumis anguria L. | 182 images |
| Cucumis melo L. | 4734 images |
| Cucumis myriocarpus Naudin | 106 images |
| Cucumis sativus L. | 4657 images |
| Cucurbita ficifolia Bouché | 164 images |
| Cucurbita foetidissima Kunth | 259 images |
| Cucurbita maxima Duchesne | 4888 images |
| Cucurbita palmata S.Watson | 7 images |
| Cucurbita pepo L. | 5117 images |
| Cuscuta approximata Bab. | 35 images |
| Cuscuta californica Hook. & Arn. | 5 images |
| Cuscuta campestris Yunck. | 578 images |
| Cuscuta cephalanthi Engelm. | 3 images |
| Cuscuta denticulata Engelm. | 16 images |
| Cuscuta epithymum (L.) L. | 1088 images |
| Cuscuta gronovii Willd. ex Schult. | 4 images |
| Cuscuta indecora Choisy | 15 images |
| Cuscuta pentagona Engelm. | 12 images |
| Cuscuta salina Engelm. | 74 images |
| Cuscuta suaveolens Ser. | 1 images |
| Cuscuta subinclusa Durand & Hilg. | 8 images |
| Cuscuta suksdorfii Yunck. | 4 images |
| Cuscuta umbellata Kunth | 4 images |
| Cusickiella quadricostata (Rollins) Rollins | 14 images |
| Cyclachaena xanthiifolia (Nutt.) Fresen. | 96 images |
| Cycladenia humilis Benth. | 24 images |
| Cyclospermum leptophyllum (Pers.) Sprague ex Britton & P.Wilson | 373 images |
| Cydonia oblonga Mill. | 9942 images |
| Cylindropuntia × congesta (Griffiths) F.M.Knuth | 1 images |
| Cylindropuntia × viridiflora (Britton & Rose) F.M.Knuth | 1 images |
| Cylindropuntia acanthocarpa (Engelm. & J.M.Bigelow) F.M.Knuth | 30 images |
| Cylindropuntia arbuscula (Engelm.) F.M.Knuth | 1 images |
| Cylindropuntia bigelovii (Engelm.) F.M.Knuth | 71 images |
| Cylindropuntia echinocarpa (Engelm. & J.M.Bigelow) F.M.Knuth | 31 images |
| Cylindropuntia fulgida (Engelm.) F.M.Knuth | 190 images |
| Cylindropuntia ganderi (C.B.Wolf) Rebman & Pinkava | 2 images |
| Cylindropuntia imbricata (Haw.) F.M.Knuth | 416 images |
| Cylindropuntia leptocaulis (DC.) F.M.Knuth | 33 images |
| Cylindropuntia prolifera (Engelm.) F.M.Knuth | 4 images |
| Cylindropuntia ramosissima (Engelm.) F.M.Knuth | 26 images |
| Cylindropuntia whipplei (Engelm. & J.M.Bigelow) F.M.Knuth | 23 images |
| Cymbalaria muralis G.Gaertn., B.Mey. & Scherb. | 1411 images |
| Cymopterus alpinus A.Gray | 35 images |
| Cymopterus glomeratus (Nutt.) DC. | 2 images |
| Cymopterus lemmonii (J.M.Coult. & Rose) Dorn | 70 images |
| Cymopterus longipes S.Watson | 12 images |
| Cymopterus nivalis S.Watson | 1 images |
| Cymopterus petraeus M.E.Jones | 15 images |
| Cymopterus purpureus S.Watson | 3 images |
| Cymopterus terebinthinus (Hook.) Torr. & A.Gray | 13 images |
| Cynanchum ligulatum (Benth.) Woodson | 5 images |
| Cynara cardunculus L. | 6436 images |
| Cynodon dactylon (L.) Pers. | 2433 images |
| Cynodon plectostachyus (K.Schum.) Pilg. | 2 images |
| Cynoglossum officinale L. | 3007 images |
| Cynosurus cristatus L. | 634 images |
| Cynosurus echinatus L. | 542 images |
| Cyperus aggregatus (Willd.) Endl. | 48 images |
| Cyperus alternifolius L. | 2004 images |
| Cyperus amabilis Vahl | 4 images |
| Cyperus bipartitus Torr. | 6 images |
| Cyperus brevifolius (Rottb.) Hassk. | 143 images |
| Cyperus difformis L. | 107 images |
| Cyperus eragrostis Lam. | 2311 images |
| Cyperus esculentus L. | 801 images |
| Cyperus flavescens L. | 58 images |
| Cyperus fuscus L. | 313 images |
| Cyperus hermaphroditus (Jacq.) Standl. | 13 images |
| Cyperus iria L. | 43 images |
| Cyperus laevigatus L. | 48 images |
| Cyperus ligularis L. | 53 images |
| Cyperus mutisii (Kunth) Andersson | 3 images |
| Cyperus odoratus L. | 112 images |
| Cyperus pallidicolor (Kük.) G.C.Tucker | 4 images |
| Cyperus papyrus L. | 1200 images |
| Cyperus prolifer Lam. | 7 images |
| Cyperus rotundus L. | 922 images |
| Cyperus seslerioides Kunth | 4 images |
| Cyperus squarrosus L. | 25 images |
| Cyperus strigosus L. | 280 images |
| Cyperus subsquarrosus (Muhl.) Bauters | 160 images |
| Cyperus virens Michx. | 11 images |
| Cypripedium californicum A.Gray | 16 images |
| Cypripedium montanum Douglas ex Lindl. | 95 images |
| Cypripedium parviflorum Salisb. | 297 images |
| Cyrtomium falcatum (L.f.) C.Presl | 343 images |
| Cystopteris bulbifera (L.) Bernh. | 89 images |
| Cystopteris fragilis (L.) Bernh. | 1041 images |
| Cystopteris tenuis (Michx.) Desv. | 3 images |
| Cytisus multiflorus (L'Hér.) Sweet | 384 images |
| Cytisus scoparius (L.) Link | 11398 images |
| Cytisus striatus (Hill) Rothm. | 759 images |
| Dactylis glomerata L. | 9498 images |
| Dactyloctenium aegyptium (L.) Willd. | 390 images |
| Dactyloctenium radulans (R.Br.) P.Beauv. | 3 images |
| Dactylorhiza viridis (L.) R.M.Bateman, Pridgeon & M.W.Chase | 729 images |
| Dalea candida Willd. | 9 images |
| Dalea formosa Torr. | 63 images |
| Dalea jamesii (Torr.) Torr. & A.Gray | 2 images |
| Dalea lanata Spreng. | 4 images |
| Dalea leporina (Aiton) Bullock | 22 images |
| Dalea mollis Benth. | 36 images |
| Dalea mollissima (Rydb.) Munz | 8 images |
| Dalea multiflora (Nutt.) Shinners | 14 images |
| Dalea pulchra Gentry | 7 images |
| Dalea purpurea Vent. | 224 images |
| Dalea versicolor Zucc. | 11 images |
| Danthonia californica Bol. | 18 images |
| Danthonia decumbens (L.) DC. | 86 images |
| Danthonia intermedia Vasey | 2 images |
| Danthonia unispicata (Thurb.) Munro ex Macoun | 21 images |
| Darlingtonia californica Torr. | 204 images |
| Darmera peltata (Torr. ex Benth.) Voss | 705 images |
| Dasiphora fruticosa (L.) Rydb. | 6042 images |
| Dasylirion wheeleri S.Watson ex Rothr. | 146 images |
| Datura discolor Bernh. | 30 images |
| Datura ferox L. | 338 images |
| Datura innoxia Mill. | 1479 images |
| Datura stramonium L. | 14075 images |
| Datura wrightii Regel | 1234 images |
| Daucus carota L. | 24296 images |
| Daucus pusillus Michx. | 193 images |
| Deinandra bacigalupii B.G.Baldwin | 4 images |
| Deinandra fasciculata (DC.) Greene | 1 images |
| Deinandra kelloggii Greene | 5 images |
| Deinandra lobbii (Greene) Greene | 3 images |
| Deinandra paniculata (A.Gray) Davidson & Moxley | 6 images |
| Delairea odorata Lem. | 713 images |
| Delphinium ajacis L. | 5640 images |
| Delphinium barbeyi (Huth) Huth | 9 images |
| Delphinium cardinale Hook. | 47 images |
| Delphinium depauperatum Nutt. | 9 images |
| Delphinium geraniifolium Rydb. | 5 images |
| Delphinium gracilentum Greene | 5 images |
| Delphinium gypsophilum Ewan | 15 images |
| Delphinium hansenii (Greene) Greene | 29 images |
| Delphinium hutchinsoniae Ewan | 11 images |
| Delphinium nuttallianum Pritz. ex Walp. | 163 images |
| Delphinium patens Benth. | 66 images |
| Delphinium polycladon Eastw. | 21 images |
| Delphinium purpusii Brandegee | 3 images |
| Delphinium recurvatum Greene | 15 images |
| Delphinium scaposum Greene | 15 images |
| Delphinium wootonii Rydb. | 4 images |
| Dendromecon harfordii Kellogg | 22 images |
| Dendromecon rigida Benth. | 182 images |
| Dermatophyllum arizonicum (S.Watson) Vincent | 1 images |
| Deschampsia bolanderi (Thurb.) Saarela | 1 images |
| Deschampsia cespitosa (L.) P.Beauv. | 424 images |
| Deschampsia elongata (Hook.) Munro | 3 images |
| Descurainia pinnata (Walter) Britton | 160 images |
| Descurainia sophia (L.) Webb ex Prantl | 738 images |
| Desmanthus illinoensis (Michx.) MacMill. ex B.L.Rob. & Fernald | 86 images |
| Desmanthus virgatus (L.) Willd. | 212 images |
| Desmodium angustifolium (Kunth) DC. | 7 images |
| Desmodium illinoense A.Gray | 2 images |
| Desmodium intortum (Mill.) Urb. | 167 images |
| Desmodium procumbens (Mill.) C.L.Hitchc. | 25 images |
| Desmodium psilophyllum Schltdl. | 1 images |
| Desmodium scorpiurus (Sw.) Desv. ex DC. | 4 images |
| Deutzia crenata Siebold & Zucc. | 209 images |
| Dianthera candicans (Nees) Benth. & Hook.f. ex Hemsl. | 23 images |
| Dianthus armeria L. | 2205 images |
| Dianthus barbatus L. | 10319 images |
| Dianthus deltoides L. | 3739 images |
| Dianthus nudiflorus Griff. | 86 images |
| Dianthus plumarius L. | 1374 images |
| Diaperia verna (Raf.) Morefield | 8 images |
| Dicentra formosa (Andrews) Walp. | 299 images |
| Dicentra nevadensis Eastw. | 4 images |
| Dicentra uniflora Kellogg | 44 images |
| Dichanthelium scribnerianum (Nash) J.R.Thomas | 2 images |
| Dichelostemma congestum (Sm.) Kunth | 55 images |
| Dichelostemma ida-maia (Alph.Wood) Greene | 51 images |
| Dichelostemma multiflorum (Benth.) A.Heller | 54 images |
| Dichelostemma volubile (Kellogg) A.Heller | 47 images |
| Dichondra argentea Willd. | 504 images |
| Dichondra carolinensis Michx. | 210 images |
| Dichondra micrantha Urb. | 948 images |
| Dichondra occidentalis House | 10 images |
| Dichondra sericea Sw. | 7 images |
| Dicliptera resupinata (Vahl) Juss. | 28 images |
| Dieteria asteroides Torr. | 5 images |
| Dieteria canescens (Pursh) Nutt. | 68 images |
| Digitalis purpurea L. | 20242 images |
| Digitaria californica (Benth.) Henrard | 4 images |
| Digitaria ciliaris (Retz.) Koeler | 197 images |
| Digitaria eriantha Steud. | 24 images |
| Digitaria insularis (L.) Mez ex Ekman | 29 images |
| Digitaria ischaemum (Schreb.) Muhl. | 48 images |
| Digitaria sanguinalis (L.) Scop. | 2150 images |
| Dimeresia howellii A.Gray | 6 images |
| Dimorphocarpa wislizeni (Engelm.) Rollins | 4 images |
| Dimorphotheca ecklonis DC. | 8818 images |
| Dimorphotheca pluvialis (L.) Moench | 4197 images |
| Dimorphotheca sinuata DC. | 1571 images |
| Dionaea muscipula J.Ellis | 1689 images |
| Dioscorea bulbifera L. | 472 images |
| Diospyros virginiana L. | 2198 images |
| Diplachne fusca (L.) P.Beauv. ex Roem. & Schult. | 44 images |
| Diplacus aurantiacus (Curtis) Jeps. | 319 images |
| Diplacus clevelandii (Brandegee) Greene | 1 images |
| Diplacus puniceus Nutt. | 54 images |
| Diplotaxis erucoides (L.) DC. | 7138 images |
| Diplotaxis muralis (L.) DC. | 817 images |
| Diplotaxis tenuifolia (L.) DC. | 5547 images |
| Dipogon lignosus (L.) Verdc. | 48 images |
| Dipsacus fullonum L. | 12947 images |
| Dipsacus sativus (L.) Honck. | 2335 images |
| Dipterostemon capitatus (Benth.) Rydb. | 466 images |
| Distichlis littoralis (Engelm.) H.L.Bell & Columbus | 4 images |
| Distichlis spicata (L.) Greene | 90 images |
| Dithyrea californica Harv. | 64 images |
| Dittrichia graveolens (L.) Greuter | 937 images |
| Dittrichia viscosa (L.) Greuter | 8079 images |
| Dodonaea viscosa Jacq. | 226 images |
| Doellingeria engelmannii (D.C.Eaton) Semple, Brouillet & G.A.Allen | 1 images |
| Doellingeria ledophylla (A.Gray) Semple, Brouillet & G.A.Allen | 42 images |
| Doellingeria tomentella (Greene) Semple, Brouillet & G.A.Allen | 1 images |
| Downingia bella Hoover | 1 images |
| Downingia concolor Greene | 16 images |
| Downingia cuspidata (Greene) Rattan | 7 images |
| Downingia elegans (Douglas ex Lindl.) Torr. | 1 images |
| Downingia insignis Greene | 15 images |
| Downingia montana Greene | 5 images |
| Downingia ornatissima Greene | 15 images |
| Downingia pulchella (Lindl.) Torr. | 8 images |
| Downingia pusilla (G.Don ex A.DC.) Torr. | 2 images |
| Downingia yina Applegate | 9 images |
| Draba corrugata S.Watson | 2 images |
| Draba crassifolia Graham | 1 images |
| Draba fladnizensis Wulfen | 11 images |
| Draba helleriana Greene | 8 images |
| Draba nemorosa L. | 83 images |
| Draba oligosperma Hook. | 6 images |
| Draba verna L. | 2693 images |
| Dracocephalum parviflorum Nutt. | 28 images |
| Drosanthemum floribundum (Haw.) Schwantes | 713 images |
| Drosera × obovata Mert. & W.D.J.Koch | 31 images |
| Drosera anglica Huds. | 276 images |
| Drosera capensis L. | 512 images |
| Drosera rotundifolia L. | 1434 images |
| Drymocallis arguta (Pursh) Rydb. | 7 images |
| Dryopteris arguta (Kaulf.) Watt | 3 images |
| Dryopteris expansa (C.Presl) Fraser-Jenk. & Jermy | 101 images |
| Dryopteris filix-mas (L.) Schott | 6110 images |
| Dudleya abramsii Rose | 19 images |
| Dudleya caespitosa (Haw.) Britton & Rose | 9 images |
| Dudleya candelabrum Rose | 11 images |
| Dudleya cymosa (Lem.) Britton & Rose | 6 images |
| Dudleya densiflora (Rose) Moran | 37 images |
| Dudleya edulis (Nutt.) Moran | 262 images |
| Dudleya farinosa (Lindl.) Britton & Rose | 6 images |
| Dudleya gnoma S.W.McCabe | 6 images |
| Dudleya greenei Rose | 1798 images |
| Dudleya lanceolata (Nutt.) Britton & Rose | 6 images |
| Dudleya nesiotica (Moran) Moran | 11 images |
| Dudleya pulverulenta (Nutt.) Britton & Rose | 114 images |
| Dudleya saxosa (M.E.Jones) Britton & Rose | 2 images |
| Dudleya traskiae (Rose) Moran | 4 images |
| Dudleya virens (Rose) Moran | 15 images |
| Dulichium arundinaceum (L.) Britton | 35 images |
| Duranta erecta L. | 7599 images |
| Dysphania ambrosioides (L.) Mosyakin & Clemants | 1225 images |
| Dysphania anthelmintica (L.) Mosyakin & Clemants | 1 images |
| Dysphania atriplicifolia (Spreng.) G.Kadereit, Sukhor. & Uotila | 59 images |
| Dysphania botrys (L.) Mosyakin & Clemants | 104 images |
| Dysphania chilensis (Schrad.) Mosyakin & Clemants | 3 images |
| Dysphania multifida (L.) Mosyakin & Clemants | 56 images |
| Dysphania pumilio (R.Br.) Mosyakin & Clemants | 237 images |
| Dyssodia papposa (Vent.) Hitchc. | 23 images |
| Eastwoodia elegans Brandegee | 11 images |
| Eatonella nivea A.Gray | 6 images |
| Echeandia flavescens (Schult. & Schult.f.) Cruden | 17 images |
| Echinocactus horizonthalonius Lem. | 107 images |
| Echinocactus polycephalus Engelm. & J.M.Bigelow | 6 images |
| Echinocereus apachensis W.Blum & Rutow | 2 images |
| Echinocereus arizonicus Rose ex Orcutt | 3 images |
| Echinocereus engelmannii (Parry ex Engelm.) Lem. | 469 images |
| Echinocereus fasciculatus (Engelm. ex B.D.Jacks.) L.D.Benson | 4 images |
| Echinocereus fendleri (Engelm.) Sencke ex Haage | 7 images |
| Echinocereus ledingii Peebles | 5 images |
| Echinocereus nicholii (L.D.Benson) B.D.Parfitt | 4 images |
| Echinocereus rigidissimus (Engelm.) Hirscht | 3 images |
| Echinocereus triglochidiatus Engelm. | 341 images |
| Echinocereus viridiflorus Engelm. | 94 images |
| Echinochloa colonum (L.) Link | 201 images |
| Echinochloa crus-galli (L.) P.Beauv. | 2490 images |
| Echinochloa frumentacea Link | 13 images |
| Echinochloa muricata (P.Beauv.) Fernald | 40 images |
| Echinochloa oryzoides (Ard.) Fritsch | 17 images |
| Echinocystis lobata (Michx.) Torr. & A.Gray | 718 images |
| Echinodorus berteroi (Spreng.) Fassett | 12 images |
| Echinopepon wrightii (A.Gray) S.Watson | 9 images |
| Echinops sphaerocephalus L. | 2880 images |
| Echium candicans L.f. | 2692 images |
| Echium plantagineum L. | 7154 images |
| Echium vulgare L. | 31062 images |
| Eclipta prostrata (L.) L. | 1260 images |
| Ehrendorferia ochroleuca (Engelm.) Fukuhara | 3 images |
| Ehrharta calycina Sm. | 4 images |
| Ehrharta erecta Lam. | 41 images |
| Ehrharta longiflora Sm. | 1 images |
| Elaeagnus angustifolia L. | 4748 images |
| Elaeagnus commutata Bernh. ex Rydb. | 193 images |
| Elatine rubella Rydb. | 6 images |
| Elatine triandra Schkuhr | 39 images |
| Eleocharis acicularis (L.) Roem. & Schult. | 51 images |
| Eleocharis atropurpurea (Retz.) J.Presl & C.Presl | 4 images |
| Eleocharis erythropoda Steud. | 5 images |
| Eleocharis exigua (Kunth) Roem. & Schult. | 2 images |
| Eleocharis flavescens (Poir.) Urb. | 8 images |
| Eleocharis macrostachya Britton | 11 images |
| Eleocharis montana (Kunth) Roem. & Schult. | 1 images |
| Eleocharis obtusa (Willd.) Schult. | 31 images |
| Eleocharis ovata (Roth) Roem. & Schult. | 42 images |
| Eleocharis palustris (L.) Roem. & Schult. | 599 images |
| Eleocharis parvula (Roem. & Schult.) Link ex Bluff, Nees & Schauer | 40 images |
| Eleocharis quinqueflora (Hartmann) O.Schwarz | 50 images |
| Eleocharis uniglumis (Link) Schult. | 26 images |
| Eleusine indica (L.) Gaertn. | 828 images |
| Eleusine tristachya (Lam.) Lam. | 136 images |
| Eleutherococcus sieboldianus (Makino) Koidz. | 8 images |
| Ellisia nyctelea (L.) L. | 51 images |
| Elodea canadensis Michx. | 217 images |
| Elodea densa (Planch.) Casp. | 112 images |
| Elodea nuttallii (Planch.) H.St.John | 71 images |
| Elymus canadensis L. | 116 images |
| Elymus elymoides (Raf.) Swezey | 21 images |
| Elymus glaucus Buckley | 13 images |
| Elymus repens (L.) Gould | 540 images |
| Elymus violaceus (Hornem.) J.Feilberg | 8 images |
| Elymus virginicus L. | 45 images |
| Elytraria imbricata (Vahl) Pers. | 38 images |
| Emmenanthe penduliflora Benth. | 101 images |
| Empetrum nigrum L. | 1109 images |
| Encelia actoni Elmer | 1 images |
| Encelia californica Nutt. | 322 images |
| Encelia farinosa A.Gray ex Torr. | 237 images |
| Encelia frutescens A.Gray | 30 images |
| Encelia virginensis A.Nelson | 29 images |
| Enceliopsis nudicaulis A.Nelson | 8 images |
| Enemion stipitatum (A.Gray) J.R.Drumm. & Hutch. | 1 images |
| Engelmannia peristenia (Raf.) Goodman & C.A.Lawson | 17 images |
| Enneapogon desvauxii P.Beauv. | 7 images |
| Ephedra californica S.Watson | 4 images |
| Ephedra funerea Coville & C.V.Morton | 6 images |
| Ephedra viridis Coville | 114 images |
| Epilobium anagallidifolium Lam. | 182 images |
| Epilobium angustifolium L. | 16336 images |
| Epilobium brachycarpum C.Presl | 248 images |
| Epilobium canum (Greene) P.H.Raven | 273 images |
| Epilobium ciliatum Raf. | 4005 images |
| Epilobium clavatum Trel. | 2 images |
| Epilobium glaberrimum Barbey | 13 images |
| Epilobium hallianum Hausskn. | 1 images |
| Epilobium hirsutum L. | 12262 images |
| Epilobium hornemannii Rchb. | 23 images |
| Epilobium howellii Hoch | 10 images |
| Epilobium lactiflorum Hausskn. | 18 images |
| Epilobium latifolium L. | 74 images |
| Epilobium leptophyllum Raf. | 8 images |
| Epilobium luteum Pursh | 26 images |
| Epilobium minutum Lindl. ex Lehm. | 13 images |
| Epilobium nevadense Munz | 3 images |
| Epilobium nivium Brandegee | 7 images |
| Epilobium obcordatum A.Gray | 1 images |
| Epilobium oreganum Greene | 16 images |
| Epilobium oregonense Hausskn. | 4 images |
| Epilobium palustre L. | 357 images |
| Epilobium rigidum Hausskn. | 4 images |
| Epilobium suffruticosum Nutt. | 3 images |
| Epipactis gigantea Douglas | 171 images |
| Epipactis helleborine (L.) Crantz | 5856 images |
| Epithelantha micromeris (Engelm.) F.A.C.Weber ex Britton & Rose | 55 images |
| Equisetum × ferrissii Clute | 1 images |
| Equisetum × litorale Kühlew. ex Rupr. | 15 images |
| Equisetum arvense L. | 5991 images |
| Equisetum laevigatum A.Braun & Engelm. | 67 images |
| Equisetum palustre L. | 834 images |
| Equisetum variegatum Schleich. ex F.Weber & D.Mohr | 94 images |
| Eragrostis barrelieri Daveau | 59 images |
| Eragrostis cilianensis (All.) Vignolo ex Janch. | 85 images |
| Eragrostis curvula (Schrad.) Nees | 60 images |
| Eragrostis hypnoides (Lam.) Britton, Sterns & Poggenb. | 5 images |
| Eragrostis lehmanniana Nees | 4 images |
| Eragrostis mexicana (Hornem.) Link | 27 images |
| Eragrostis minor Host | 260 images |
| Eragrostis pectinacea (Michx.) Nees | 27 images |
| Eragrostis pilosa (L.) P.Beauv. | 51 images |
| Eragrostis spectabilis (Pursh) Steud. | 163 images |
| Eragrostis superba Peyr. | 242 images |
| Eremalche parryi (Greene) Greene | 43 images |
| Eremalche rotundifolia (A.Gray) Greene | 3 images |
| Eremocrinum albomarginatum (M.E.Jones) M.E.Jones | 1 images |
| Eremogone capillaris (Poir.) Fenzl | 7 images |
| Eremopyrum triticeum (Gaertn.) Nevski | 10 images |
| Eriastrum signatum D.Gowen | 8 images |
| Erica lusitanica Rudolphi | 353 images |
| Ericameria cuneata McClatchie | 1 images |
| Ericameria ericoides (Less.) Nutt. ex Jeps. | 11 images |
| Ericameria palmeri (A.Gray) H.M.Hall | 5 images |
| Erigeron algidus Jeps. | 12 images |
| Erigeron aliceae Howell | 13 images |
| Erigeron annuus (L.) Desf | 199 images |
| Erigeron barbellulatus Greene | 1 images |
| Erigeron biolettii Greene | 7 images |
| Erigeron blochmaniae Greene | 3 images |
| Erigeron caespitosus Nutt. | 3 images |
| Erigeron canadensis L. | 12936 images |
| Erigeron clokeyi Cronquist | 14 images |
| Erigeron compactus S.F.Blake | 2 images |
| Erigeron compositus Pursh | 34 images |
| Erigeron coulteri Porter & J.M.Coult. | 67 images |
| Erigeron divergens Torr. & A.Gray | 8 images |
| Erigeron elegantulus Greene | 25 images |
| Erigeron elmeri Greene | 4 images |
| Erigeron flagellaris A.Gray | 2 images |
| Erigeron floribundus (Kunth) Sch.Bip. | 1562 images |
| Erigeron foliosus Nutt. | 173 images |
| Erigeron formosissimus Greene | 5 images |
| Erigeron glabellus Nutt. | 108 images |
| Erigeron glaucus Ker Gawl. | 1058 images |
| Erigeron grandiflorus Hook. | 1 images |
| Erigeron humilis Graham | 6 images |
| Erigeron karvinskianus DC. | 4564 images |
| Erigeron lassenianus Greene | 4 images |
| Erigeron linearis (Hook.) Piper | 34 images |
| Erigeron lonchophyllus Hook. | 13 images |
| Erigeron modestus A.Gray | 6 images |
| Erigeron nanus Nutt. | 1 images |
| Erigeron neomexicanus A.Gray | 2 images |
| Erigeron petrophilus Greene | 19 images |
| Erigeron philadelphicus L. | 2927 images |
| Erigeron pumilus Nutt. | 61 images |
| Erigeron rhizomatus Cronquist | 3 images |
| Erigeron scopulinus G.L.Nesom & V.D.Roth | 7 images |
| Erigeron speciosus (Lindl.) DC. | 853 images |
| Erigeron strigosus Muhl. ex Willd. | 3914 images |
| Erigeron vagus Payson | 19 images |
| Eriochloa barbatus (Trin.) S.Yadav & M.R.Almeida | 2 images |
| Eriochloa villosa (Thunb.) Kunth | 6 images |
| Eriocoma nelsonii (Scribn.) Romasch. | 1 images |
| Eriodictyon angustifolium Nutt. | 12 images |
| Eriodictyon crassifolium Benth. | 159 images |
| Eriodictyon tomentosum Benth. | 28 images |
| Eriodictyon traskiae Eastw. | 4 images |
| Eriodictyon trichocalyx A.Heller | 7 images |
| Eriogonum alatum Torr. | 9 images |
| Eriogonum alpinum Engelm. | 14 images |
| Eriogonum anemophilum Greene | 1 images |
| Eriogonum angulosum Benth. | 22 images |
| Eriogonum apiculatum S.Watson | 1 images |
| Eriogonum arborescens Greene | 33 images |
| Eriogonum baileyi S.Watson | 1 images |
| Eriogonum brachyanthum Coville | 2 images |
| Eriogonum brachypodum Torr. & A.Gray | 1 images |
| Eriogonum brevicaule Nutt. | 2 images |
| Eriogonum caespitosum Nutt. | 37 images |
| Eriogonum cernuum Nutt. | 12 images |
| Eriogonum cinereum Benth. | 31 images |
| Eriogonum compositum Douglas ex Benth. | 28 images |
| Eriogonum congdonii (S.Stokes) Reveal | 6 images |
| Eriogonum corymbosum Benth. | 4 images |
| Eriogonum covilleanum Eastw. | 5 images |
| Eriogonum crocatum Davidson | 24 images |
| Eriogonum crosbyae Reveal | 6 images |
| Eriogonum dasyanthemum Torr. & A.Gray | 4 images |
| Eriogonum davidsonii Greene | 2 images |
| Eriogonum deflexum Torr. | 19 images |
| Eriogonum diclinum Reveal | 6 images |
| Eriogonum douglasii Benth. | 25 images |
| Eriogonum elatum Douglas ex Benth. | 27 images |
| Eriogonum elongatum Benth. | 30 images |
| Eriogonum fasciculatum Benth. | 844 images |
| Eriogonum giganteum S.Watson | 52 images |
| Eriogonum gilmanii S.Stokes | 6 images |
| Eriogonum gossypinum Curran | 6 images |
| Eriogonum gracile Benth. | 10 images |
| Eriogonum gracilipes S.Watson | 34 images |
| Eriogonum grande Greene | 43 images |
| Eriogonum heracleoides Nutt. | 101 images |
| Eriogonum incanum Torr. & A.Gray | 37 images |
| Eriogonum inflatum Torr. | 30 images |
| Eriogonum intrafractum Coville & C.V.Morton | 4 images |
| Eriogonum jamesii Benth. | 12 images |
| Eriogonum kelloggii A.Gray | 1 images |
| Eriogonum kennedyi Porter ex S.Watson | 2 images |
| Eriogonum lachnogynum Torr. ex Benth. | 6 images |
| Eriogonum latens Jeps. | 1 images |
| Eriogonum latifolium Sm. | 180 images |
| Eriogonum lemmonii S.Watson | 11 images |
| Eriogonum leptophyllum (Torr.) Wooton & Standl. | 1 images |
| Eriogonum libertini Reveal | 5 images |
| Eriogonum lobbii Torr. & A.Gray | 23 images |
| Eriogonum luteolum Greene | 21 images |
| Eriogonum maculatum A.Heller | 42 images |
| Eriogonum microtheca Nutt. | 24 images |
| Eriogonum molestum S.Watson | 1 images |
| Eriogonum nervulosum (S.Stokes) Reveal | 2 images |
| Eriogonum nidularium Coville | 24 images |
| Eriogonum nortonii Greene | 6 images |
| Eriogonum nudum Douglas ex Benth. | 77 images |
| Eriogonum ochrocephalum S.Watson | 2 images |
| Eriogonum ovalifolium Nutt. | 149 images |
| Eriogonum parishii S.Watson | 2 images |
| Eriogonum parvifolium Sm. | 74 images |
| Eriogonum pendulum S.Watson | 6 images |
| Eriogonum plumatella Durand & Hilg. | 23 images |
| Eriogonum prattenianum Durand | 13 images |
| Eriogonum prociduum Reveal | 5 images |
| Eriogonum pyrolifolium Hook. | 46 images |
| Eriogonum racemosum Nutt. | 12 images |
| Eriogonum rixfordii S.Stokes | 11 images |
| Eriogonum robustum Greene | 21 images |
| Eriogonum roseum Durand & Hilg. | 15 images |
| Eriogonum rotundifolium Benth. | 1 images |
| Eriogonum rubricaule Tidestr. | 1 images |
| Eriogonum saxatile S.Watson | 34 images |
| Eriogonum shockleyi S.Watson | 7 images |
| Eriogonum siskiyouense Small | 9 images |
| Eriogonum spathulatum A.Gray | 1 images |
| Eriogonum spergulinum A.Gray | 5 images |
| Eriogonum sphaerocephalum Douglas ex Benth. | 21 images |
| Eriogonum strictum Benth. | 41 images |
| Eriogonum subreniforme S.Watson | 2 images |
| Eriogonum thomasii Torr. | 23 images |
| Eriogonum thurberi Torr. | 1 images |
| Eriogonum tiehmii Reveal | 8 images |
| Eriogonum trichopes Torr. | 14 images |
| Eriogonum tripodum Greene | 3 images |
| Eriogonum truncatum Torr. & A.Gray | 2 images |
| Eriogonum umbellatum Torr. | 401 images |
| Eriogonum ursinum S.Watson | 21 images |
| Eriogonum vimineum Douglas ex Benth. | 22 images |
| Eriogonum wrightii Torr. ex Benth. | 97 images |
| Erioneuron pilosum (Buckley) Nash | 10 images |
| Eriophorum scheuchzeri Hoppe | 879 images |
| Eriophyllum ambiguum A.Gray | 15 images |
| Eriophyllum confertiflorum (DC.) A.Gray | 6 images |
| Eriophyllum congdonii Brandegee | 7 images |
| Eriophyllum jepsonii Greene | 1 images |
| Eriophyllum lanatum (Pursh) J.Forbes | 54 images |
| Eriophyllum latilobum Rydb. | 2 images |
| Eriophyllum pringlei A.Gray | 7 images |
| Eriophyllum staechadifolium Lag. | 22 images |
| Erodium botrys (Cav.) Bertol. | 540 images |
| Erodium brachycarpum (Godr.) Thell. | 14 images |
| Erodium cicutarium (L.) L'Hér. | 12745 images |
| Erodium malacoides (L.) L'Hér. | 3918 images |
| Erodium moschatum (L.) L'Hér. | 4472 images |
| Erodium salzmannii Delile | 1 images |
| Eruca vesicaria (L.) Cav. | 3911 images |
| Erucastrum gallicum (Willd.) O.E.Schulz | 296 images |
| Eryngium aristulatum Jeps. | 16 images |
| Eryngium armatum (S.Watson) J.M.Coult. & Rose | 14 images |
| Eryngium heterophyllum Engelm. | 30 images |
| Eryngium lemmonii J.M.Coult. & Rose | 18 images |
| Eryngium racemosum Jeps. | 1 images |
| Eryngium vaseyi J.M.Coult. & Rose | 4 images |
| Erysimum × cheiri (L.) Crantz | 6260 images |
| Erysimum capitatum (Douglas) Greene | 11 images |
| Erysimum cheiranthoides L. | 1109 images |
| Erysimum franciscanum Rossbach | 20 images |
| Erysimum repandum L. | 54 images |
| Erysimum teretifolium Eastw. | 8 images |
| Erysimum virgatum Roth | 106 images |
| Erythranthe bicolor (Hartw. ex Benth.) G.L.Nesom & N.S.Fraga | 1 images |
| Erythranthe cardinalis (Douglas ex Benth.) Spach | 167 images |
| Erythranthe floribunda (Lindl.) G.L.Nesom | 9 images |
| Erythranthe guttata (DC.) G.L.Nesom | 828 images |
| Erythranthe lewisii (Pursh) G.L.Nesom & N.S.Fraga | 41 images |
| Erythranthe moschata (Douglas ex Lindl.) G.L.Nesom | 9 images |
| Erythranthe tilingii (Regel) G.L.Nesom | 3 images |
| Erythrina flabelliformis Kearney | 89 images |
| Erythronium californicum Purdy | 34 images |
| Erythronium citrinum S.Watson | 9 images |
| Erythronium grandiflorum Pursh | 147 images |
| Erythronium helenae Applegate | 10 images |
| Erythronium hendersonii S.Watson | 32 images |
| Erythronium howellii S.Watson | 7 images |
| Erythronium klamathense Applegate | 7 images |
| Erythronium oregonum Applegate | 125 images |
| Erythronium purpurascens S.Watson | 20 images |
| Erythronium revolutum Sm. | 116 images |
| Erythronium tuolumnense Applegate | 237 images |
| Erythrostemon gilliesii (Hook.) Klotzsch | 2374 images |
| Eschscholzia caespitosa Benth. | 180 images |
| Eschscholzia californica Cham. | 13563 images |
| Eschscholzia glyptosperma Greene | 40 images |
| Eschscholzia hypecoides Benth. | 6 images |
| Eschscholzia lemmonii Greene | 12 images |
| Eschscholzia lobbii Greene | 42 images |
| Eschscholzia parishii Greene | 6 images |
| Eschscholzia ramosa (Greene) Greene | 9 images |
| Escobaria missouriensis (Sweet) D.R.Hunt | 14 images |
| Escobaria robbinsiorum (W.H.Earle) D.R.Hunt | 3 images |
| Escobaria sneedii Britton & Rose | 21 images |
| Escobaria vivipara (Nutt.) Buxb. | 87 images |
| Eucalyptus camaldulensis Dehnh. | 2430 images |
| Eucalyptus cladocalyx F.Muell. | 9 images |
| Eucalyptus conferruminata D.J.Carr & S.G.M.Carr | 12 images |
| Eucalyptus globulus Labill. | 4457 images |
| Eucalyptus mannifera Mudie | 5 images |
| Eucalyptus polyanthemos S.Schauer | 382 images |
| Eucalyptus pulchella Desf. | 4 images |
| Eucalyptus pulverulenta Sims | 482 images |
| Eucalyptus robusta Sm. | 336 images |
| Eucalyptus sideroxylon A.Cunn. ex Woolls | 133 images |
| Eucalyptus tereticornis Sm. | 65 images |
| Eucalyptus viminalis Labill. | 60 images |
| Euchiton japonicus (Thunb.) Holub | 1 images |
| Euclidium syriacum (L.) W.T.Aiton | 3 images |
| Eucrypta chrysanthemifolia (Benth.) Greene | 102 images |
| Eulobus californicus Nutt. | 139 images |
| Euonymus alatus (Thunb.) Siebold | 2921 images |
| Euonymus europaeus L. | 18948 images |
| Euonymus occidentalis Nutt. ex Torr. | 27 images |
| Euphorbia albomarginata Torr. & A.Gray | 30 images |
| Euphorbia cyparissias L. | 15386 images |
| Euphorbia davidii Subils | 37 images |
| Euphorbia dendroides L. | 1836 images |
| Euphorbia dentata Michx. | 17 images |
| Euphorbia exigua L. | 565 images |
| Euphorbia glyptosperma Engelm. | 36 images |
| Euphorbia graminea Jacq. | 187 images |
| Euphorbia helioscopia L. | 8600 images |
| Euphorbia heterophylla L. | 974 images |
| Euphorbia hirta L. | 1060 images |
| Euphorbia hypericifolia L. | 1686 images |
| Euphorbia hyssopifolia L. | 119 images |
| Euphorbia lathyris L. | 8693 images |
| Euphorbia maculata L. | 726 images |
| Euphorbia marginata Pursh | 1353 images |
| Euphorbia misera Benth. | 5 images |
| Euphorbia myrsinites L. | 2111 images |
| Euphorbia nutans Lag. | 358 images |
| Euphorbia oblongata Griseb. | 1 images |
| Euphorbia ophthalmica Pers. | 9 images |
| Euphorbia parryi Engelm. | 2 images |
| Euphorbia pediculifera Engelm. | 1 images |
| Euphorbia peplus L. | 6484 images |
| Euphorbia polycarpa Benth. | 1 images |
| Euphorbia prostrata Aiton | 1845 images |
| Euphorbia radians Benth. | 1 images |
| Euphorbia saratoi Ardoino | 1 images |
| Euphorbia serpens Kunth | 487 images |
| Euphorbia serrata L. | 3394 images |
| Euphorbia serrula Engelm. | 1 images |
| Euphorbia terracina L. | 626 images |
| Euphorbia virgata Waldst. & Kit. | 15 images |
| Euphrosyne acerosa (Nutt.) Panero | 3 images |
| Euploca convolvulacea Nutt. | 2 images |
| Euploca procumbens (Mill.) Diane & Hilger | 26 images |
| Eurybia glauca (Nutt.) G.L.Nesom | 2 images |
| Eustoma exaltatum (L.) Salisb. ex G.Don | 61 images |
| Euthamia occidentalis Nutt. | 42 images |
| Eutrochium maculatum (L.) E.E.Lamont | 1226 images |
| Evolvulus alsinoides (L.) L. | 680 images |
| Evolvulus arizonicus A.Gray | 30 images |
| Evolvulus sericeus Sw. | 68 images |
| Extriplex californica (Moq.) E.H.Zacharias | 14 images |
| Fagopyrum esculentum Moench | 5647 images |
| Fallopia baldschuanica (Regel) Holub | 1210 images |
| Fallopia convolvulus (L.) Á.Löve | 1312 images |
| Fallugia paradoxa (D.Don ex Tilloch & Taylor) Endl. ex Torr. | 19 images |
| Ferocactus cylindraceus (Engelm.) Orcutt | 437 images |
| Ferocactus emoryi Orcutt | 665 images |
| Ferocactus viridescens (Torr. & A.Gray) Britton & Rose | 5 images |
| Ferocactus wislizeni (Engelm.) Britton & Rose | 50 images |
| Festuca arizonica Vasey | 3 images |
| Festuca arvernensis Auquier, Kerguélen & Markgr.-Dann. | 47 images |
| Festuca bromoides L. | 174 images |
| Festuca californica Vasey | 14 images |
| Festuca idahoensis Elmer | 3 images |
| Festuca microstachys Nutt. | 18 images |
| Festuca myuros L. | 246 images |
| Festuca occidentalis Hook. | 7 images |
| Festuca octoflora Walter | 10 images |
| Festuca ovina L. | 206 images |
| Festuca rubra L. | 316 images |
| Festuca trachyphylla (Hack.) Hack. | 14 images |
| Festuca valesiaca Schleich. ex Gaudin | 21 images |
| Festuca viridula Vasey | 1 images |
| Ficus carica L. | 14161 images |
| Ficus microcarpa L.f. | 3887 images |
| Ficus rubiginosa Desf. ex Vent. | 783 images |
| Filago californica Nutt. | 1 images |
| Filago pyramidata L. | 477 images |
| Fimbristylis dichotoma (L.) Vahl | 59 images |
| Fimbristylis vahlii (Lam.) Link | 20 images |
| Fingerhuthia africana Nees ex Lehm. | 5 images |
| Flaveria trinervia (Spreng.) C.Mohr | 74 images |
| Fleischmannia sonorae (A.Gray) R.M.King & H.Rob. | 1 images |
| Floerkea proserpinacoides Willd. | 45 images |
| Flourensia cernua DC. | 2 images |
| Foeniculum vulgare Mill. | 10738 images |
| Forestiera pubescens Nutt. | 98 images |
| Forsythia suspensa (Thunb.) Vahl | 4875 images |
| Fouquieria splendens Engelm. | 418 images |
| Fragaria × ananassa (Duchesne ex Weston) Duchesne ex Rozier | 3974 images |
| Fragaria chiloensis (L.) Mill. | 349 images |
| Fragaria vesca L. | 11252 images |
| Fragaria virginiana Mill. | 326 images |
| Frangula californica (Eschsch.) A.Gray | 50 images |
| Frangula purshiana (DC.) A.Gray ex J.G.Cooper | 11 images |
| Frangula rubra (Greene) Grubov | 1 images |
| Frankenia pulverulenta L. | 141 images |
| Frasera albicaulis Griseb. | 6 images |
| Frasera parryi Torr. | 8 images |
| Frasera speciosa Douglas ex Griseb. | 57 images |
| Frasera tubulosa Coville | 1 images |
| Fraxinus anomala Torr. ex S.Watson | 7 images |
| Fraxinus cuspidata Torr. | 12 images |
| Fraxinus dipetala Hook. & Arn. | 9 images |
| Fraxinus latifolia Benth. | 205 images |
| Fraxinus pennsylvanica Marshall | 808 images |
| Fraxinus velutina Torr. | 108 images |
| Freesia leichtlinii Klatt | 794 images |
| Fremontodendron californicum (Torr.) Coville | 702 images |
| Fremontodendron mexicanum Davidson | 37 images |
| Fritillaria affinis (Schult. & Schult.f.) Sealy | 18 images |
| Fritillaria agrestis Greene | 18 images |
| Fritillaria atropurpurea Nutt. | 77 images |
| Fritillaria biflora Lindl. | 30 images |
| Fritillaria brandegeei Eastw. | 5 images |
| Fritillaria falcata (Jeps.) D.E.Beetle | 9 images |
| Fritillaria glauca Greene | 4 images |
| Fritillaria liliacea Lindl. | 40 images |
| Fritillaria micrantha A.Heller | 26 images |
| Fritillaria ojaiensis Davidson | 5 images |
| Fritillaria pinetorum Davidson | 13 images |
| Fritillaria pluriflora Torr. ex Benth. | 13 images |
| Fritillaria pudica (Pursh) Spreng. | 51 images |
| Fritillaria purdyi Eastw. | 16 images |
| Fritillaria recurva Benth. | 50 images |
| Fritillaria striata Eastw. | 10 images |
| Fritillaria viridea Kellogg | 1 images |
| Froelichia gracilis (Hook.) Moq. | 33 images |
| Fuchsia boliviana Carrière | 660 images |
| Fuchsia magellanica Lam. | 10065 images |
| Fuchsia paniculata Lindl. | 190 images |
| Fumaria officinalis L. | 7511 images |
| Funastrum crispum (Benth.) Schltr. | 3 images |
| Funastrum cynanchoides (Decne.) Schltr. | 37 images |
| Funastrum hirtellum (Vail) Schltr. | 45 images |
| Gagea serotina (L.) Ker Gawl. | 113 images |
| Gaillardia aristata Pursh | 2520 images |
| Gaillardia pinnatifida Torr. | 61 images |
| Gaillardia pulchella Foug. | 3199 images |
| Gaillardia spathulata A.Gray | 5 images |
| Galactia volubilis (L.) Britton | 4 images |
| Galanthus nivalis L. | 5009 images |
| Galeopsis tetrahit L. | 8640 images |
| Galinsoga parviflora Cav. | 3206 images |
| Galium angustifolium Nutt. | 8 images |
| Galium aparine L. | 12720 images |
| Galium boreale L. | 917 images |
| Galium clementis Eastw. | 2 images |
| Galium divaricatum Pourr. ex Lam. | 24 images |
| Galium mexicanum Kunth | 3 images |
| Galium mollugo L. | 9316 images |
| Galium murale (L.) All. | 227 images |
| Galium oreganum Britton | 4 images |
| Galium parisiense L. | 155 images |
| Galium porrigens Dempster | 48 images |
| Galium saxatile L. | 1304 images |
| Galium serpenticum Dempster | 8 images |
| Galium stellatum Kellogg | 11 images |
| Galium tricornutum Dandy | 285 images |
| Galium trifidum L. | 36 images |
| Galium triflorum Michx. | 191 images |
| Galium uncinulatum DC. | 1 images |
| Galium verum L. | 9821 images |
| Gambelia speciosa Nutt. | 54 images |
| Gamochaeta americana (Mill.) Wedd. | 274 images |
| Gamochaeta pensylvanica (Willd.) Cabrera | 66 images |
| Gamochaeta purpurea (L.) Cabrera | 79 images |
| Garrya elliptica Douglas ex Lindl. | 606 images |
| Garrya flavescens S.Watson | 29 images |
| Garrya fremontii Torr. | 36 images |
| Garrya veatchii Kellogg | 15 images |
| Garrya wrightii Torr. | 3 images |
| Gaudinia fragilis (L.) P.Beauv. | 132 images |
| Gaultheria humifusa (Graham) Rydb. | 25 images |
| Gaultheria shallon Pursh | 876 images |
| Gayophytum eriospermum Coville | 12 images |
| Gayophytum humile Juss. | 10 images |
| Gazania linearis (Thunb.) Druce | 1602 images |
| Genista canariensis L. | 151 images |
| Genista linifolia L. | 250 images |
| Gentiana affinis Griseb. | 35 images |
| Gentiana algida Pall. | 21 images |
| Gentiana calycosa Griseb. | 136 images |
| Gentiana fremontii Torr. | 4 images |
| Gentiana newberryi A.Gray | 1 images |
| Gentiana parryi Engelm. | 22 images |
| Gentiana prostrata Haenke | 9 images |
| Gentiana sceptrum Griseb. | 3 images |
| Gentianella amarella (L.) Börner | 143 images |
| Gentianopsis macrantha (D.Don ex G.Don) Iltis | 6 images |
| Gentianopsis thermalis (Kuntze) Iltis | 10 images |
| Geraea canescens Torr. & A.Gray | 41 images |
| Geranium bicknellii Britton | 30 images |
| Geranium carolinianum L. | 1264 images |
| Geranium columbinum L. | 1196 images |
| Geranium core-core Steud. | 9 images |
| Geranium dissectum L. | 5779 images |
| Geranium homeanum Turcz. | 21 images |
| Geranium lucidum L. | 2452 images |
| Geranium molle L. | 8644 images |
| Geranium oreganum Howell | 13 images |
| Geranium palmatum Cav. | 61 images |
| Geranium purpureum Vill. | 8136 images |
| Geranium pusillum L. | 8263 images |
| Geranium pyrenaicum Burm.f. | 7093 images |
| Geranium richardsonii Fisch. & Trautv. | 18 images |
| Geranium robertianum L. | 22267 images |
| Geranium rotundifolium L. | 4449 images |
| Geranium sanguineum L. | 8817 images |
| Geranium sibiricum L. | 508 images |
| Geranium solanderi Carolin | 9 images |
| Geranium viscosissimum Fisch. & C.A.Mey. | 85 images |
| Geranium yeoi Aedo & Muñoz Garm. | 1 images |
| Geum aleppicum Jacq. | 241 images |
| Geum macrophyllum Willd. | 2944 images |
| Geum rossii (R.Br.) Ser. | 26 images |
| Geum triflorum Pursh | 95 images |
| Geum urbanum L. | 14115 images |
| Gilia achilleifolia Benth. | 63 images |
| Gilia capitata Sims | 473 images |
| Gilia inconspicua (Sm.) Sweet | 2 images |
| Gilia leptantha Parish | 4 images |
| Gilia nevinii A.Gray | 1 images |
| Gilia ophthalmoides Brand | 5 images |
| Gilia sinuata Douglas ex Benth. | 21 images |
| Gilia tenuiflora Benth. | 18 images |
| Gilia tricolor Benth. | 369 images |
| Gilmania luteola (Coville) Coville | 10 images |
| Githopsis pulchella Vatke | 28 images |
| Githopsis specularioides Nutt. | 3 images |
| Gladiolus italicus Mill. | 4950 images |
| Gladiolus tristis L. | 31 images |
| Glaucium corniculatum (L.) Curtis | 101 images |
| Glebionis coronaria (L.) Cass. ex Spach | 5443 images |
| Glebionis segetum (L.) Fourr. | 4770 images |
| Glechoma hederacea L. | 25728 images |
| Gleditsia triacanthos L. | 10632 images |
| Glehnia littoralis (A.Gray) F.Schmidt ex Miq. | 1 images |
| Glinus lotoides L. | 114 images |
| Glinus radiatus (Ruiz & Pav.) Rohrb. | 1 images |
| Glyceria fluitans (L.) R.Br. | 149 images |
| Glyceria leptostachya Buckley | 4 images |
| Glyceria striata (Lam.) Hitchc. | 33 images |
| Glycyrrhiza lepidota Pursh | 72 images |
| Glyptopleura marginata D.C.Eaton | 12 images |
| Glyptopleura setulosa A.Gray | 4 images |
| Gnaphalium exilifolium A.Nelson | 7 images |
| Gnaphalium palustre Nutt. | 35 images |
| Gnaphalium uliginosum L. | 1063 images |
| Gomphocarpus fruticosus (L.) W.T.Aiton | 234 images |
| Gomphrena caespitosa Torr. | 10 images |
| Gomphrena nitida Rothr. | 5 images |
| Gomphrena sonorae Torr. | 2 images |
| Goodyera oblongifolia Raf. | 192 images |
| Goodyera repens (L.) R.Br. | 322 images |
| Gossypium thurberi Tod. | 1 images |
| Graptopetalum rusbyi (Greene) Rose | 45 images |
| Gratiola neglecta Torr. | 18 images |
| Grayia spinosa (Hook.) Moq. | 58 images |
| Grevillea robusta A.Cunn. ex R.Br. | 2764 images |
| Grindelia arizonica A.Gray | 3 images |
| Grindelia ciliata (Nutt.) Spreng. | 9 images |
| Grindelia hirsutula Hook. & Arn. | 108 images |
| Grindelia squarrosa (Pursh) Dunal | 295 images |
| Grusonia emoryi (Engelm.) Pinkava | 2 images |
| Grusonia kunzei (Rose) Pinkava | 3 images |
| Grusonia pulchella (Engelm.) H.Rob. | 5 images |
| Guilleminea densa (Willd. ex Schult.) Moq. | 38 images |
| Guizotia abyssinica (L.f.) Cass. | 863 images |
| Gunnera tinctoria (Molina) Mirb. | 2837 images |
| Gutierrezia californica (DC.) Torr. & A.Gray | 17 images |
| Gutierrezia microcephala (DC.) A.Gray | 20 images |
| Gutierrezia sarothrae (Pursh) Britton & Rusby | 66 images |
| Gutierrezia sphaerocephala A.Gray | 2 images |
| Gutierrezia wrightii A.Gray | 2 images |
| Gymnocarpium dryopteris (L.) Newman | 654 images |
| Gypsophila acutifolia Steven ex Spreng. | 9 images |
| Gypsophila elegans M.Bieb. | 1124 images |
| Gypsophila paniculata L. | 1250 images |
| Gypsophila scorzonerifolia Ser. | 3 images |
| Gypsophila vaccaria (L.) Sm. | 1380 images |
| Hackelia bella (J.F.Macbr.) I.M.Johnst. | 11 images |
| Hackelia californica (A.Gray) I.M.Johnst. | 6 images |
| Hackelia cusickii (Piper) Brand | 2 images |
| Hackelia floribunda (Lehm.) I.M.Johnst. | 19 images |
| Hackelia mundula (Jeps.) Ferris | 2 images |
| Hackelia nervosa (Kellogg) I.M.Johnst. | 12 images |
| Hackelia patens (Nutt.) I.M.Johnst. | 2 images |
| Hackelia pinetorum (Greene ex A.Gray) I.M.Johnst. | 3 images |
| Hackelia velutina (Piper) I.M.Johnst. | 172 images |
| Hackelochloa granularis (L.) Kuntze | 9 images |
| Hakonechloa macra (Munro) Honda | 179 images |
| Halerpestes cymbalaria (Pursh) Greene | 11 images |
| Halogeton glomeratus (M.Bieb.) Ledeb. | 6 images |
| Haloragis erecta (Murray) Oken | 10 images |
| Haplophyton crooksii (L.D.Benson) L.D.Benson | 9 images |
| Hastingsia alba (Durand) S.Watson | 12 images |
| Hastingsia serpentinicola Becking | 2 images |
| Hazardia detonsa Greene | 28 images |
| Hazardia orcuttii Greene | 7 images |
| Hazardia squarrosa (Hook. & Arn.) Greene | 12 images |
| Hazardia whitneyi Greene | 6 images |
| Hedeoma drummondii Benth. | 6 images |
| Hedeoma nana (Torr.) Briq. | 11 images |
| Hedlundia hybrida (L.) Sennikov & Kurtto | 35 images |
| Hedypnois rhagadioloides (L.) F.W.Schmidt | 413 images |
| Hedysarum boreale Nutt. | 8 images |
| Hedysarum occidentale Greene | 2 images |
| Helenium amarum (Raf.) H.Rock | 385 images |
| Helenium autumnale L. | 1400 images |
| Helenium bigelovii A.Gray | 68 images |
| Helenium bolanderi A.Gray | 6 images |
| Helenium microcephalum DC. | 18 images |
| Helenium puberulum DC. | 84 images |
| Helianthella californica A.Gray | 19 images |
| Helianthella castanea Greene | 16 images |
| Helianthus annuus L. | 15271 images |
| Helianthus bolanderi A.Gray | 14 images |
| Helianthus californicus DC. | 27 images |
| Helianthus ciliaris DC. | 17 images |
| Helianthus gracilentus A.Gray | 14 images |
| Helianthus maximiliani Schrad. | 477 images |
| Helianthus niveus (Benth.) Brandegee | 56 images |
| Helianthus nuttallii Torr. & A.Gray | 12 images |
| Helianthus petiolaris Nutt. | 568 images |
| Helianthus tuberosus L. | 7579 images |
| Helichrysum petiolare Hilliard & B.L.Burtt | 709 images |
| Heliomeris longifolia Cockerell | 6 images |
| Heliomeris multiflora Nutt. | 54 images |
| Heliopsis parvifolia A.Gray | 15 images |
| Heliotropium amplexicaule Vahl | 318 images |
| Heliotropium curassavicum L. | 652 images |
| Heliotropium europaeum L. | 4880 images |
| Helminthotheca echioides (L.) Holub | 7198 images |
| Helosciadium nodiflorum (L.) W.D.J.Koch | 1422 images |
| Hemerocallis fulva (L.) L. | 9888 images |
| Hemieva ranunculifolia Raf. | 2 images |
| Hemionitis aschenborniana (Klotzsch) Christenh. | 6 images |
| Hemionitis atropurpurea (L.) Christenh. | 45 images |
| Hemionitis bonariensis (Willd.) Christenh. | 14 images |
| Hemionitis brachyptera (T.Moore) Christenh. | 4 images |
| Hemionitis breweri (Eat.Pr.) Christenh. | 1 images |
| Hemionitis bridgesii (Hook.) Christenh. | 20 images |
| Hemionitis californica (Hook.) Christenh. | 1 images |
| Hemionitis covillei (Maxon) Christenh. | 1 images |
| Hemionitis densa (Brack.) Christenh. | 58 images |
| Hemionitis eatonii (Baker) Christenh. | 2 images |
| Hemionitis fantastica Christenh. | 12 images |
| Hemionitis feei (T.Moore) Christenh. | 2 images |
| Hemionitis incana (C.Presl) Christenh. | 3 images |
| Hemionitis intertexta (Maxon) Christenh. | 3 images |
| Hemionitis lemmonii (D.C.Eaton) Christenh. | 2 images |
| Hemionitis lendigera (Cav.) Christenh. | 7 images |
| Hemionitis limitanea (Maxon) Christenh. | 1 images |
| Hemionitis lindheimeri (Hook.) Christenh. | 3 images |
| Hemionitis neglecta (Maxon) Christenh. | 2 images |
| Hemionitis nivea (Poir.) Christenh. | 35 images |
| Hemionitis parryi (D.C.Eaton) Christenh. | 19 images |
| Hemionitis sinuata (Lag.) Christenh. | 13 images |
| Hemionitis triangularis (Kaulf.) Christenh. | 1 images |
| Hemionitis wrightiana (Hook.) Christenh. | 2 images |
| Hemitomes congestum A.Gray | 31 images |
| Hemizonella minima A.Gray | 22 images |
| Hemizonia congesta DC. | 97 images |
| Henrya insularis Nees | 10 images |
| Heracleum maximum W.Bartram | 681 images |
| Herissantia crispa (L.) Brizicky | 33 images |
| Hermannia pauciflora S.Watson | 3 images |
| Herniaria cinerea DC. | 21 images |
| Herniaria glabra L. | 631 images |
| Herniaria hirsuta L. | 290 images |
| Hesperevax acaulis (Kellogg) Greene | 8 images |
| Hesperis matronalis L. | 7530 images |
| Hesperocallis undulata A.Gray | 68 images |
| Hesperochiron californicus (Benth.) S.Watson | 23 images |
| Hesperochiron pumilus (Griseb.) Porter | 11 images |
| Hesperocnide tenella Torr. | 15 images |
| Hesperocyparis abramsiana (C.B.Wolf) Bartel | 3 images |
| Hesperocyparis arizonica (Greene) Bartel | 5036 images |
| Hesperocyparis bakeri (Jeps.) Bartel | 17 images |
| Hesperocyparis forbesii (Jeps.) Bartel | 1 images |
| Hesperocyparis goveniana (Gordon) Bartel | 45 images |
| Hesperocyparis macnabiana (A.Murray bis) Bartel | 8 images |
| Hesperocyparis macrocarpa (Hartw.) Bartel | 2262 images |
| Hesperocyparis sargentii (Jeps.) Bartel | 2 images |
| Hesperoyucca newberryi (McKelvey) Clary | 1 images |
| Hesperoyucca whipplei (Torr.) Trel. | 79 images |
| Heteranthemis viscide-hirta Schott | 11 images |
| Heteranthera dubia (Jacq.) MacMill. | 24 images |
| Heteranthera limosa (Sw.) Willd. | 45 images |
| Heteropogon contortus (L.) P.Beauv. ex Roem. & Schult. | 103 images |
| Heterosperma pinnatum Cav. | 7 images |
| Heterotheca cinerascens (S.F.Blake) G.L.Nesom | 4 images |
| Heterotheca grandiflora Nutt. | 279 images |
| Heterotheca oregona (Nutt.) Shinners | 13 images |
| Heterotheca rutteri (Rothr.) Shinners | 1 images |
| Heterotheca sessiliflora (Nutt.) Shinners | 60 images |
| Heterotheca subaxillaris (Lam.) Britton & Rusby | 283 images |
| Heterotheca viscida (A.Gray) V.L.Harms | 8 images |
| Heuchera abramsii Rydb. | 3 images |
| Heuchera caespitosa Eastw. | 33 images |
| Heuchera cylindrica Douglas | 16 images |
| Heuchera elegans Abrams | 5 images |
| Heuchera maxima Greene | 27 images |
| Heuchera merriamii Eastw. | 11 images |
| Heuchera micrantha Douglas | 1 images |
| Heuchera parishii Rydb. | 20 images |
| Heuchera parvifolia Nutt. | 5 images |
| Heuchera rubescens Torr. | 84 images |
| Heuchera sanguinea Engelm. | 6681 images |
| Hexasepalum teres (Walter) J.H.Kirkbr. | 106 images |
| Hibiscus coulteri Harv. ex A.Gray | 6 images |
| Hibiscus denudatus Benth. | 42 images |
| Hibiscus moscheutos L. | 4705 images |
| Hibiscus rosa-sinensis L. | 20660 images |
| Hibiscus syriacus L. | 24077 images |
| Hibiscus trionum L. | 1041 images |
| Hieracium albiflorum Hook. | 184 images |
| Hieracium fendleri Sch.Bip. | 1 images |
| Hieracium horridum Fr. | 43 images |
| Hieracium murorum L. | 3581 images |
| Hieracium scouleri Hook. | 16 images |
| Hieracium triste Willd. ex Spreng. | 17 images |
| Hippocrepis emerus (L.) Lassen | 3987 images |
| Hippuris vulgaris L. | 477 images |
| Hirschfeldia incana (L.) Lagr.-Foss. | 2169 images |
| Hoffmannseggia glauca (Ortega) Eifert | 102 images |
| Hoffmannseggia microphylla Torr. | 29 images |
| Hoffmannseggia repens (Eastw.) Cockerell | 2 images |
| Hoita orbicularis (Lindl.) Rydb. | 4 images |
| Holcus lanatus L. | 5426 images |
| Holcus mollis L. | 174 images |
| Hollisteria lanata S.Watson | 10 images |
| Holocarpha heermannii (Greene) D.D.Keck | 24 images |
| Holocarpha macradenia Greene | 6 images |
| Holocarpha virgata (A.Gray) D.D.Keck | 17 images |
| Holodiscus discolor (Pursh) Maxim. | 668 images |
| Holosteum umbellatum L. | 144 images |
| Holozonia filipes (Hook. & Arn.) Greene | 6 images |
| Hooveria parviflora (S.Watson) D.W.Taylor & D.J.Keil | 5 images |
| Hooveria purpurea (Brandegee) D.W.Taylor & D.J.Keil | 2 images |
| Hopia obtusa (Kunth) Zuloaga & Morrone | 1 images |
| Hordeum brachyantherum Nevski | 20 images |
| Hordeum bulbosum L. | 79 images |
| Hordeum jubatum L. | 479 images |
| Hordeum marinum Huds. | 263 images |
| Hordeum murinum L. | 6647 images |
| Hordeum pusillum Nutt. | 54 images |
| Hordeum vulgare L. | 8499 images |
| Hornungia procumbens (L.) Hayek | 98 images |
| Horsfordia newberryi (S.Watson) A.Gray | 33 images |
| Hosackia crassifolia Benth. | 3 images |
| Hosackia gracilis Benth. | 15 images |
| Hosackia oblongifolia Benth. | 8 images |
| Hosackia stipularis Benth. | 5 images |
| Houstonia rubra Cav. | 19 images |
| Hulsea vestita A.Gray | 34 images |
| Humulus lupulus L. | 9502 images |
| Hyacinthus orientalis L. | 10173 images |
| Hydrilla verticillata (L.f.) Royle | 6 images |
| Hydrocharis laevigata (Humb. & Bonpl. ex Willd.) Byng & Christenh. | 31 images |
| Hydrocotyle ranunculoides L.f. | 198 images |
| Hydrocotyle sibthorpioides Lam. | 825 images |
| Hydrocotyle umbellata L. | 58 images |
| Hydrocotyle verticillata Thunb. | 589 images |
| Hydrophyllum capitatum Douglas ex Benth. | 106 images |
| Hydrophyllum fendleri (A.Gray) A.Heller | 17 images |
| Hydrophyllum occidentale (S.Watson) A.Gray | 41 images |
| Hydrophyllum tenuipes A.Heller | 11 images |
| Hymenopappus filifolius Hook. | 55 images |
| Hymenothrix loomisii S.F.Blake | 2 images |
| Hymenothrix wislizeni A.Gray | 4 images |
| Hymenothrix wrightii A.Gray | 15 images |
| Hymenoxys cooperi Cockerell | 15 images |
| Hymenoxys grandiflora (Torr. & A.Gray) K.F.Parker | 1 images |
| Hymenoxys hoopesii (A.Gray) Bierner | 41 images |
| Hymenoxys odorata DC. | 14 images |
| Hymenoxys richardsonii (Hook.) Cockerell | 6 images |
| Hymenoxys subintegra Cockerell | 2 images |
| Hyparrhenia hirta (L.) Stapf | 874 images |
| Hypericum canariense L. | 255 images |
| Hypericum concinnum Benth. | 17 images |
| Hypericum mutilum L. | 112 images |
| Hypericum perforatum L. | 16595 images |
| Hypericum scouleri Hook. | 43 images |
| Hypochaeris glabra L. | 2451 images |
| Iberis sempervirens L. | 4922 images |
| Iberis umbellata L. | 1440 images |
| Ibervillea tenuisecta (A.Gray) Small | 7 images |
| Ibicella lutea (Lindl.) Van Eselt. | 148 images |
| Ilex aquifolium L. | 15604 images |
| Iliamna bakeri (Jeps.) Wiggins | 16 images |
| Iliamna latibracteata Wiggins | 6 images |
| Iliamna rivularis (Douglas) Greene | 24 images |
| Impatiens balfourii Hook.f. | 4353 images |
| Impatiens glandulifera Royle | 13817 images |
| Impatiens noli-tangere L. | 2288 images |
| Imperata brevifolia Vasey | 1 images |
| Inula helenium L. | 2507 images |
| Ipheion uniflorum (Graham) Raf. | 2594 images |
| Ipomoea cairica (L.) Sweet | 1468 images |
| Ipomoea capillacea (Kunth) G.Don | 20 images |
| Ipomoea costellata Torr. | 9 images |
| Ipomoea cristulata Hallier f. | 50 images |
| Ipomoea hederacea Jacq. | 501 images |
| Ipomoea hederifolia L. | 691 images |
| Ipomoea indica (Burm.) Merr. | 4193 images |
| Ipomoea lindheimeri A.Gray | 24 images |
| Ipomoea longifolia Benth. | 15 images |
| Ipomoea nil (L.) Roth | 488 images |
| Ipomoea plummerae A.Gray | 20 images |
| Ipomoea pubescens Lam. | 19 images |
| Ipomoea purpurea (L.) Roth | 7515 images |
| Ipomoea quamoclit L. | 679 images |
| Ipomoea tenuiloba Torr. | 14 images |
| Ipomoea ternifolia Cav. | 23 images |
| Ipomoea triloba L. | 270 images |
| Ipomopsis aggregata (Pursh) V.E.Grant | 1 images |
| Ipomopsis arizonica (Greene) Wherry | 7 images |
| Ipomopsis congesta (Hook.) V.E.Grant | 40 images |
| Ipomopsis longiflora (Torr.) V.E.Grant | 5 images |
| Ipomopsis macombii (Torr. ex A.Gray) V.E.Grant | 12 images |
| Ipomopsis multiflora (Nutt.) V.E.Grant | 2 images |
| Ipomopsis pumila (Nutt.) V.E.Grant | 5 images |
| Ipomopsis tenuituba (Rydb.) V.E.Grant | 54 images |
| Iris chrysophylla Howell | 19 images |
| Iris douglasiana Herb. | 331 images |
| Iris fernaldii R.C.Foster | 1 images |
| Iris foetidissima L. | 3602 images |
| Iris hartwegii Baker | 45 images |
| Iris longipetala Herb. | 2 images |
| Iris macrosiphon Torr. | 68 images |
| Iris missouriensis Nutt. | 101 images |
| Iris munzii R.C.Foster | 1 images |
| Iris orientalis Mill. | 1141 images |
| Iris pallida Lam. | 2335 images |
| Iris pseudacorus L. | 9461 images |
| Iris purdyi Eastw. | 13 images |
| Iris reichenbachiana Klatt | 192 images |
| Iris sibirica L. | 2214 images |
| Iris spuria L. | 481 images |
| Iris tenax Douglas ex Lindl. | 41 images |
| Iris tenuissima Dykes | 13 images |
| Isatis tinctoria L. | 3689 images |
| Ismelia carinata (Schousb.) Sch.Bip. | 324 images |
| Isocoma acradenia (Greene) Greene | 22 images |
| Isocoma arguta Greene | 11 images |
| Isolepis cernua (Vahl) Roem. & Schult. | 106 images |
| Isolepis setacea (L.) R.Br. | 67 images |
| Iva axillaris Pursh | 6 images |
| Iva hayesiana A.Gray | 17 images |
| Ixia maculata L. | 378 images |
| Ixia polystachya L. | 8 images |
| Jacobaea vulgaris Gaertn. | 18526 images |
| Jacquemontia evolvuloides (Moric.) Meisn. | 8 images |
| Jaltomata procumbens (Cav.) J.L.Gentry | 9 images |
| Jamesia americana Torr. & A.Gray | 16 images |
| Janusia gracilis A.Gray | 6 images |
| Jatropha cuneata Wiggins & Rollins | 8 images |
| Jatropha macrorhiza Benth. | 5 images |
| Jaumea carnosa A.Gray | 23 images |
| Jepsonia heterandra Eastw. | 13 images |
| Jepsonia malvifolia (Greene) Small | 10 images |
| Jepsonia parryi (Torr.) Small | 27 images |
| Johnstonella angustifolia (Torr.) Hasenstab & M.G.Simpson | 3 images |
| Juglans californica S.Watson | 160 images |
| Juglans major (Torr.) A.Heller | 55 images |
| Juncus acutus L. | 1065 images |
| Juncus alpinoarticulatus Chaix | 133 images |
| Juncus articulatus L. | 675 images |
| Juncus balticus Willd. | 28 images |
| Juncus bolanderi Engelm. | 2 images |
| Juncus bufonius L. | 385 images |
| Juncus castaneus Sm. | 16 images |
| Juncus compressus Jacq. | 159 images |
| Juncus cooperi Engelm. | 2 images |
| Juncus covillei Piper | 2 images |
| Juncus diffusissimus Buckley | 2 images |
| Juncus dudleyi Wiegand | 7 images |
| Juncus effusus L. | 3380 images |
| Juncus ensifolius Wikstr. | 87 images |
| Juncus gerardi Loisel. | 100 images |
| Juncus hybridus Brot. | 25 images |
| Juncus interior Wiegand | 3 images |
| Juncus lesueurii Bol. | 1 images |
| Juncus luciensis Ertter | 4 images |
| Juncus marginatus Rostk. | 4 images |
| Juncus mertensianus Bong. | 8 images |
| Juncus nodosus L. | 2 images |
| Juncus occidentalis Wiegand | 3 images |
| Juncus parryi Engelm. | 1 images |
| Juncus phaeocephalus Engelm. | 7 images |
| Juncus tenuis Willd. | 525 images |
| Juncus torreyi Coville | 23 images |
| Juncus triglumis L. | 91 images |
| Juniperus californica Carrière | 19 images |
| Juniperus communis L. | 8338 images |
| Juniperus deppeana Steud. | 92 images |
| Juniperus monosperma (Engelm.) Sarg. | 48 images |
| Juniperus occidentalis Hook. | 222 images |
| Juniperus osteosperma (Torr.) Little | 391 images |
| Juniperus pinchotii Sudw. | 27 images |
| Juniperus rigida Siebold & Zucc. | 63 images |
| Juniperus scopulorum Sarg. | 512 images |
| Justicia californica (Benth.) D.N.Gibson | 4 images |
| Justicia longii Hilsenb. | 7 images |
| Kallstroemia californica (S.Watson) Vail | 13 images |
| Kallstroemia grandiflora Torr. ex A.Gray | 62 images |
| Kallstroemia parviflora Norton | 2 images |
| Kalmia microphylla (Hook.) A.Heller | 12 images |
| Keckiella antirrhinoides (Benth.) Straw | 53 images |
| Keckiella breviflora (Lindl.) Straw | 59 images |
| Keckiella cordifolia (Benth.) Straw | 138 images |
| Keckiella lemmonii (A.Gray) Straw | 5 images |
| Keckiella rothrockii (A.Gray) Straw | 63 images |
| Keckiella ternata (Torr. ex A.Gray) Straw | 32 images |
| Kelloggia galioides Torr. | 8 images |
| Kerria japonica (L.) DC. | 7563 images |
| Kickxia elatine (L.) Dumort. | 308 images |
| Kickxia spuria (L.) Dumort. | 727 images |
| Knautia arvensis (L.) Coult. | 14968 images |
| Kniphofia uvaria (L.) Oken | 6021 images |
| Koeberlinia spinosa Zucc. | 58 images |
| Koeleria macrantha (Ledeb.) Schult. | 136 images |
| Koeleria spicata (L.) Barberá, Quintanar, Soreng & P.M.Peterson | 87 images |
| Koelreuteria paniculata Laxm. | 8562 images |
| Koenigia islandica L. | 4 images |
| Koenigia polystachya (Wall. ex Meisn.) T.M.Schust. & Reveal | 242 images |
| Kolkwitzia amabilis Graebn. | 5665 images |
| Kopsiopsis hookeri (Walp.) Govaerts | 2 images |
| Krameria erecta Willd. | 2 images |
| Krameria lanceolata Torr. | 44 images |
| Krigia biflora (Walter) S.F.Blake | 56 images |
| Lactuca biennis (Moench) Fernald | 128 images |
| Lactuca canadensis L. | 384 images |
| Lactuca graminifolia Michx. | 8 images |
| Lactuca saligna L. | 351 images |
| Lactuca sativa L. | 4746 images |
| Lactuca serriola L. | 12247 images |
| Lactuca virosa L. | 3408 images |
| Lagascea decipiens Hemsl. | 2 images |
| Lagerstroemia indica L. | 15480 images |
| Lagophylla glandulosa A.Gray | 6 images |
| Lagophylla minor (D.D.Keck) D.D.Keck | 5 images |
| Lagophylla ramosissima Nutt. | 5 images |
| Lagunaria patersonia (Andrews) G.Don | 61 images |
| Lagurus ovatus L. | 3312 images |
| Lamarckia aurea (L.) Moench | 568 images |
| Lamium amplexicaule L. | 5128 images |
| Lamium purpureum L. | 16142 images |
| Langloisia setosissima (Torr.) Greene | 26 images |
| Lantana × strigocamara R.W.Sanders | 2 images |
| Lantana achyranthifolia Desf. | 68 images |
| Lantana montevidensis (Spreng.) Briq. | 1651 images |
| Lappula occidentalis (S.Watson) Greene | 4 images |
| Lappula squarrosa (Retz.) Dumort. | 210 images |
| Lapsana communis L. | 13370 images |
| Larrea tridentata (DC.) Coville | 144 images |
| Lastarriaea coriacea (Goodman) Hoover | 3 images |
| Lasthenia burkei Greene | 10 images |
| Lasthenia californica DC. ex Lindl. | 124 images |
| Lasthenia conjugens Greene | 8 images |
| Lasthenia ferrisiae Ornduff | 5 images |
| Lasthenia fremontii Greene | 7 images |
| Lasthenia glaberrima DC. | 9 images |
| Lasthenia glabrata Lindl. | 39 images |
| Lasthenia gracilis (DC.) Greene | 5 images |
| Lasthenia microglossa Greene | 6 images |
| Lasthenia minor (DC.) Ornduff | 11 images |
| Lathyrus angulatus L. | 125 images |
| Lathyrus brachycalyx Rydb. | 18 images |
| Lathyrus cicera L. | 1696 images |
| Lathyrus glandulosus Broich | 9 images |
| Lathyrus grimesii Barneby | 3 images |
| Lathyrus hirsutus L. | 547 images |
| Lathyrus japonicus Willd. | 580 images |
| Lathyrus jepsonii Greene | 9 images |
| Lathyrus lanszwertii Kellogg | 15 images |
| Lathyrus latifolius L. | 9599 images |
| Lathyrus nevadensis S.Watson | 8 images |
| Lathyrus oleraceus Lam. | 4974 images |
| Lathyrus palustris L. | 200 images |
| Lathyrus pauciflorus Fernald | 14 images |
| Lathyrus rigidus T.G.White | 1 images |
| Lathyrus sphaericus Retz. | 508 images |
| Lathyrus splendens Kellogg | 7 images |
| Lathyrus tingitanus L. | 584 images |
| Lathyrus vestitus Nutt. | 3 images |
| Layia fremontii (Torr. & A.Gray) A.Gray | 29 images |
| Layia glandulosa (Hook.) Hook. & Arn. | 45 images |
| Layia heterotricha (DC.) Hook. & Arn. | 12 images |
| Layia hieracioides Hook. & Arn. | 6 images |
| Layia leucopappa D.D.Keck | 3 images |
| Layia platyglossa (Fisch. & C.A.Mey.) A.Gray | 15 images |
| Leersia hexandra Sw. | 43 images |
| Leersia oryzoides (L.) Sw. | 245 images |
| Lemna aequinoctialis Welw. | 59 images |
| Lemna gibba L. | 70 images |
| Lemna minor L. | 896 images |
| Lemna minuta Kunth | 113 images |
| Lemna trisulca L. | 102 images |
| Lemna turionifera Landolt | 20 images |
| Lemna valdiviana Phil. | 7 images |
| Leontodon saxatilis Lam. | 1107 images |
| Lepechinia calycina (Benth.) Epling | 22 images |
| Lepechinia cardiophylla Epling | 1 images |
| Lepechinia fragrans (Greene) Epling | 24 images |
| Lepechinia ganderi Epling | 22 images |
| Lepidium alyssoides A.Gray | 6 images |
| Lepidium campestre (L.) W.T.Aiton | 8 images |
| Lepidium coronopus (L.) Al-Shehbaz | 140 images |
| Lepidium davisii Rollins | 7 images |
| Lepidium densiflorum Schrad. | 48 images |
| Lepidium didymum L. | 1434 images |
| Lepidium draba L. | 7926 images |
| Lepidium flavum Torr. | 18 images |
| Lepidium fremontii S.Watson | 52 images |
| Lepidium heterophyllum Benth. | 279 images |
| Lepidium jaredii Brandegee | 5 images |
| Lepidium lasiocarpum Nutt. | 30 images |
| Lepidium latifolium L. | 767 images |
| Lepidium latipes Hook. | 3 images |
| Lepidium montanum Nutt. | 26 images |
| Lepidium nanum S.Watson | 7 images |
| Lepidium nitidum Nutt. | 39 images |
| Lepidium oblongum Small | 8 images |
| Lepidium perfoliatum L. | 40 images |
| Lepidium pinnatifidum Ledeb. | 3 images |
| Lepidium ruderale L. | 231 images |
| Lepidium thurberi Wooton | 2 images |
| Lepidium virginicum L. | 1657 images |
| Lepidospartum latisquamum S.Watson | 1 images |
| Lepidospartum squamatum (A.Gray) A.Gray | 6 images |
| Leptochloa crinita (Lag.) P.M.Peterson & N.Snow | 6 images |
| Leptochloa panicea (Retz.) Ohwi | 5 images |
| Leptosiphon acicularis Jeps. | 12 images |
| Leptosiphon ambiguus (Rattan) J.M.Porter & L.A.Johnson | 1 images |
| Leptosiphon androsaceus Benth. | 8 images |
| Leptosiphon bicolor Nutt. | 12 images |
| Leptosiphon ciliatus (Benth.) Jeps. | 1 images |
| Leptosiphon filipes (Benth.) J.M.Porter & L.A.Johnson | 1 images |
| Leptosiphon floribundus (A.Gray) J.M.Porter & L.A.Johnson | 18 images |
| Leptosiphon grandiflorus Benth. | 13 images |
| Leptosiphon liniflorus (Benth.) J.M.Porter & L.A.Johnson | 2 images |
| Leptosiphon nuttallii (A.Gray) J.M.Porter & L.A.Johnson | 4 images |
| Leptosiphon pachyphyllus (R.Patt.) J.M.Porter & L.A.Johnson | 2 images |
| Leptosiphon parviflorus Benth. | 1 images |
| Leptosiphon rosaceus (Hook.f.) Battaglia | 2 images |
| Leptospermum laevigatum (Gaertn.) F.Muell. | 124 images |
| Lespedeza bicolor Turcz. | 457 images |
| Lessingia germanorum Cham. | 16 images |
| Lessingia hololeuca Greene | 10 images |
| Lessingia leptoclada A.Gray | 16 images |
| Lessingia nemaclada Greene | 11 images |
| Lessingia tenuis (A.Gray) Coville | 2 images |
| Lessingia virgata A.Gray | 1 images |
| Leucanthemopsis pectinata (L.) G.López & C.E.Jarvis | 12 images |
| Leucanthemum lacustre (Brot.) Samp. | 2 images |
| Leucanthemum vulgare Lam. | 10457 images |
| Leucocrinum montanum Nutt. ex A.Gray | 74 images |
| Leucojum aestivum L. | 2179 images |
| Leucothoe davisiae Torr. | 36 images |
| Leuzea repens (L.) D.J.N.Hind | 23 images |
| Lewisia congdonii (Rydb.) S.Clay | 31 images |
| Lewisia cotyledon (S.Watson) B.L.Rob. | 348 images |
| Lewisia disepala Rydb. | 6 images |
| Lewisia kelloggii K.Brandegee | 14 images |
| Lewisia leeana (Porter) B.L.Rob. | 79 images |
| Lewisia longipetala (Piper) S.Clay | 121 images |
| Lewisia nevadensis (A.Gray) B.L.Rob. | 36 images |
| Lewisia oppositifolia (S.Watson) B.L.Rob. | 9 images |
| Lewisia pygmaea (A.Gray) B.L.Rob. | 25 images |
| Lewisia rediviva Pursh | 150 images |
| Leycesteria formosa Wall. | 3106 images |
| Leymus cinereus (Scribn. & Merr.) Á.Löve | 3 images |
| Leymus condensatus (J.Presl) Á.Löve | 2 images |
| Leymus mollis (Trin.) Pilg. | 6 images |
| Leymus racemosus (Lam.) Tzvelev | 13 images |
| Leymus triticoides (Buckley) Pilg. | 19 images |
| Ligusticum filicinum S.Watson | 8 images |
| Ligusticum porteri J.M.Coult. & Rose | 1 images |
| Lilaeopsis occidentalis J.M.Coult. & Rose | 8 images |
| Lilium bolanderi S.Watson | 27 images |
| Lilium bulbiferum L. | 9493 images |
| Lilium columbianum Leichtlin | 207 images |
| Lilium humboldtii Leichtlin | 91 images |
| Lilium kelleyanum Lemmon | 33 images |
| Lilium kelloggii Purdy | 23 images |
| Lilium longiflorum Thunb. | 592 images |
| Lilium maritimum Kellogg | 17 images |
| Lilium occidentale Purdy | 2 images |
| Lilium pardalinum Kellogg | 99 images |
| Lilium parryi S.Watson | 11 images |
| Lilium parvum Kellogg | 134 images |
| Lilium rubescens S.Watson | 14 images |
| Lilium washingtonianum Kellogg | 52 images |
| Limnanthes alba Hartw. ex Benth. | 7 images |
| Limnanthes douglasii R.Br. | 187 images |
| Limnanthes floccosa Howell | 8 images |
| Limnanthes montana Jeps. | 1 images |
| Limnanthes vinculans Ornduff | 15 images |
| Limnophila sessiliflora (Vahl) Blume | 23 images |
| Limonium arboreum (Willd.) Erben, A.Santos & Reyes-Bet. | 11 images |
| Limonium californicum (Boiss.) A.Heller | 21 images |
| Limonium perezii (Stapf) F.T.Hubb. | 8 images |
| Limonium ramosissimum (Poir.) Maire | 9 images |
| Limonium sinuatum (L.) Mill. | 2920 images |
| Limosella aquatica L. | 56 images |
| Linanthus concinnus Milliken | 4 images |
| Linanthus demissus (A.Gray) Greene | 14 images |
| Linanthus dianthiflorus (Benth.) Greene | 46 images |
| Linanthus dichotomus Benth. | 47 images |
| Linanthus killipii H.Mason | 2 images |
| Linanthus parryae (A.Gray) Greene | 77 images |
| Linaria bipartita (Vent.) Willd. | 1 images |
| Linaria dalmatica (L.) Mill. | 190 images |
| Linaria genistifolia (L.) Mill. | 213 images |
| Linaria maroccana Hook.f. | 1609 images |
| Linaria purpurea (L.) Mill. | 3283 images |
| Linaria vulgaris Mill. | 16822 images |
| Lindernia dubia (L.) Pennell | 215 images |
| Linnaea borealis L. | 613 images |
| Linum adenophyllum A.Gray | 3 images |
| Linum aristatum Engelm. | 5 images |
| Linum bienne Mill. | 418 images |
| Linum breweri A.Gray | 6 images |
| Linum californicum Benth. | 1 images |
| Linum congestum A.Gray | 12 images |
| Linum digynum A.Gray | 3 images |
| Linum drymarioides Curran | 3 images |
| Linum grandiflorum Desf. | 2658 images |
| Linum kingii S.Watson | 9 images |
| Linum lewisii Pursh | 172 images |
| Linum micranthum A.Gray | 5 images |
| Linum neomexicanum Greene | 2 images |
| Linum perenne L. | 2767 images |
| Linum pratense (Norton) Small | 34 images |
| Linum puberulum (Engelm.) A.Heller | 17 images |
| Linum spergulinum A.Gray | 2 images |
| Linum trigynum L. | 263 images |
| Linum usitatissimum L. | 5235 images |
| Lithophragma affine A.Gray | 90 images |
| Lithophragma bolanderi A.Gray | 9 images |
| Lithophragma glabrum Nutt. | 51 images |
| Lithophragma parviflorum (Hook.) Nutt. | 3 images |
| Lithophragma tenellum Nutt. | 5 images |
| Lithospermum californicum A.Gray | 10 images |
| Lithospermum calycosum (J.F.Macbr.) I.M.Johnst. | 1 images |
| Lithospermum cobrense Greene | 13 images |
| Lithospermum incisum Lehm. | 130 images |
| Lithospermum multiflorum Torr. ex A.Gray | 10 images |
| Lithospermum ruderale Douglas ex Lehm. | 48 images |
| Lithospermum viride Greene | 2 images |
| Lithraea molleoides (Vell.) Engl. | 50 images |
| Lobelia cardinalis L. | 1821 images |
| Lobelia fenestralis Cav. | 5 images |
| Lobelia laxiflora Kunth | 452 images |
| Lobularia maritima (L.) Desv. | 12674 images |
| Loeflingia squarrosa Nutt. | 2 images |
| Loeseliastrum matthewsii (A.Gray) Timbrook | 55 images |
| Loeseliastrum schottii (Torr.) Timbrook | 33 images |
| Logfia gallica (L.) Coss. & Germ. | 74 images |
| Lolium arundinaceum (Schreb.) Darbysh. | 726 images |
| Lolium multiflorum Lam. | 319 images |
| Lolium perenne L. | 2954 images |
| Lolium pratense (Huds.) Darbysh. | 673 images |
| Lolium rigidum Gaudin | 175 images |
| Lolium temulentum L. | 29 images |
| Lomatium austiniae (J.M.Coult. & Rose) J.M.Coult. & Rose | 12 images |
| Lomatium bicolor (S.Watson) J.M.Coult. & Rose | 12 images |
| Lomatium canbyi (J.M.Coult. & Rose) J.M.Coult. & Rose | 16 images |
| Lomatium ciliolatum Jeps. | 2 images |
| Lomatium congdonii J.M.Coult. & Rose | 4 images |
| Lomatium cous (S.Watson) J.M.Coult. & Rose | 16 images |
| Lomatium dasycarpum (Torr. & A.Gray) J.M.Coult. & Rose | 81 images |
| Lomatium dissectum (Nutt.) Mathias & Constance | 9 images |
| Lomatium engelmannii Mathias | 9 images |
| Lomatium foeniculaceum (Nutt.) J.M.Coult. & Rose | 6 images |
| Lomatium grayi (J.M.Coult. & Rose) J.M.Coult. & Rose | 31 images |
| Lomatium hendersonii (J.M.Coult. & Rose) J.M.Coult. & Rose | 1 images |
| Lomatium hooveri (Mathias & Constance) Constance & B.Ertter | 6 images |
| Lomatium howellii (S.Watson) Jeps. | 8 images |
| Lomatium insulare (Eastw.) Munz | 10 images |
| Lomatium latilobum (Rydb.) Mathias | 19 images |
| Lomatium linearifolium (S.Watson) J.F.Sm. & Mansfield | 3 images |
| Lomatium lucidum (Nutt.) Jeps. | 12 images |
| Lomatium martindalei (J.M.Coult. & Rose) J.M.Coult. & Rose | 39 images |
| Lomatium mohavense (J.M.Coult. & Rose) J.M.Coult. & Rose | 31 images |
| Lomatium nevadense (S.Watson) J.M.Coult. & Rose | 35 images |
| Lomatium nudicaule (Nutt.) J.M.Coult. & Rose | 7 images |
| Lomatium observatorium Constance & B.Ertter | 2 images |
| Lomatium parryi (S.Watson) J.F.Macbr. | 2 images |
| Lomatium parvifolium (Hook. & Arn.) Jeps. | 12 images |
| Lomatium ravenii Mathias & Constance | 5 images |
| Lomatium repostum (Jeps.) Mathias | 13 images |
| Lomatium rigidum (M.E.Jones) Jeps. | 12 images |
| Lomatium roseanum Cronquist | 5 images |
| Lomatium stebbinsii Schlessman & Constance | 8 images |
| Lomatium torreyi (J.M.Coult. & Rose) J.M.Coult. & Rose | 5 images |
| Lomatium triternatum (Pursh) J.M.Coult. & Rose | 132 images |
| Lomatium utriculatum (Nutt.) J.M.Coult. & Rose | 127 images |
| Lomatium vaginatum J.M.Coult. & Rose | 3 images |
| Lomatogonium rotatum (L.) Fr. | 1 images |
| Lomelosia stellata (L.) Raf. | 859 images |
| Lonicera caerulea L. | 1634 images |
| Lonicera ciliosa Poir. | 78 images |
| Lonicera conjugialis Kellogg | 35 images |
| Lonicera etrusca Santi | 4403 images |
| Lonicera fragrantissima Lindl. & Paxton | 1951 images |
| Lonicera hispidula (Lindl.) F.Dietr. | 6 images |
| Lonicera interrupta Benth. | 19 images |
| Lonicera involucrata (Richardson) Banks ex Spreng. | 766 images |
| Lonicera japonica Thunb. | 9736 images |
| Lonicera subspicata Hook. & Arn. | 17 images |
| Lonicera tatarica L. | 4899 images |
| Lonicera utahensis S.Watson | 34 images |
| Lophocereus schottii (Engelm.) Britton & Rose | 62 images |
| Lotus angustissimus L. | 227 images |
| Lotus corniculatus L. | 18673 images |
| Lotus pedunculatus Cav. | 3527 images |
| Ludwigia erecta (L.) H.Hara | 107 images |
| Ludwigia grandiflora (Michx.) Greuter & Burdet | 1157 images |
| Ludwigia palustris (L.) Elliott | 281 images |
| Ludwigia peploides (Kunth) P.H.Raven | 652 images |
| Ludwigia repens J.R.Forst. | 8 images |
| Luetkea pectinata (Pursh) Kuntze | 52 images |
| Luina hypoleuca Benth. | 13 images |
| Luma apiculata (DC.) Burret | 526 images |
| Lunaria annua L. | 20169 images |
| Lupinus albicaulis Douglas | 18 images |
| Lupinus albifrons Benth. | 406 images |
| Lupinus angustiflorus Eastw. | 10 images |
| Lupinus arboreus Sims | 622 images |
| Lupinus argenteus Pursh | 101 images |
| Lupinus bicolor Lindl. | 215 images |
| Lupinus cervinus Kellogg | 2 images |
| Lupinus chamissonis Eschsch. | 47 images |
| Lupinus citrinus Kellogg | 9 images |
| Lupinus covillei Greene | 5 images |
| Lupinus croceus Eastw. | 16 images |
| Lupinus densiflorus Benth. | 36 images |
| Lupinus duranii Eastw. | 26 images |
| Lupinus elmeri Greene | 4 images |
| Lupinus formosus Greene | 65 images |
| Lupinus hillii Greene | 8 images |
| Lupinus hirsutissimus Benth. | 105 images |
| Lupinus horizontalis A.Heller | 1 images |
| Lupinus latifolius Lindl. ex J.Agardh | 2 images |
| Lupinus ludovicianus Greene | 8 images |
| Lupinus luteolus Kellogg | 8 images |
| Lupinus malacophyllus Greene | 4 images |
| Lupinus meionanthus A.Gray | 27 images |
| Lupinus microcarpus Sims | 4 images |
| Lupinus neomexicanus Greene | 7 images |
| Lupinus pachylobus Greene | 1 images |
| Lupinus peirsonii H.Mason | 9 images |
| Lupinus polyphyllus Lindl. | 8092 images |
| Lupinus prunophilus M.E.Jones | 1 images |
| Lupinus pusillus Pursh | 14 images |
| Lupinus rivularis Douglas ex Lindl. | 1 images |
| Lupinus sellulus Kellogg | 51 images |
| Lupinus sericatus Kellogg | 7 images |
| Lupinus sericeus Pursh | 42 images |
| Lupinus sparsiflorus Benth. | 63 images |
| Lupinus spectabilis Hoover | 10 images |
| Lupinus stiversii Kellogg | 70 images |
| Lupinus succulentus Douglas ex K.Koch | 16 images |
| Lupinus tidestromii Greene | 5 images |
| Lupinus tracyi Eastw. | 1 images |
| Lupinus variicolor Steud. | 11 images |
| Luzula parviflora (Ehrh.) Desv. | 4 images |
| Luzula spicata (L.) DC. | 64 images |
| Lycium barbarum L. | 2722 images |
| Lycium berlandieri Dunal | 14 images |
| Lycium ferocissimum Miers | 195 images |
| Lycium pallidum Miers | 18 images |
| Lycopodiella inundata (L.) Holub | 146 images |
| Lycopodium annotinum L. | 916 images |
| Lycopodium clavatum L. | 692 images |
| Lycopus americanus Muhl. ex W.P.C.Barton | 4 images |
| Lycopus asper Greene | 11 images |
| Lycopus uniflorus Michx. | 101 images |
| Lygodesmia grandiflora Torr. & A.Gray | 31 images |
| Lyonothamnus floribundus A.Gray | 48 images |
| Lysichiton americanus Hultén & H.St.John | 562 images |
| Lysiloma watsonii Rose | 5 images |
| Lysimachia arvensis (L.) U.Manns & Anderb. | 9965 images |
| Lysimachia ciliata L. | 762 images |
| Lysimachia europaea (L.) U.Manns & Anderb. | 1067 images |
| Lysimachia foemina (Mill.) U.Manns & Anderb. | 2245 images |
| Lysimachia hybrida Michx. | 1 images |
| Lysimachia maritima (L.) Galasso, Banfi & Soldano | 362 images |
| Lysimachia minima (L.) U.Manns & Anderb. | 18 images |
| Lysimachia monelli (L.) U.Manns & Anderb. | 669 images |
| Lysimachia nummularia L. | 4015 images |
| Lysimachia thyrsiflora L. | 321 images |
| Lythrum hyssopifolia L. | 462 images |
| Lythrum junceum Banks & Sol. | 557 images |
| Lythrum portula (L.) D.A.Webb | 213 images |
| Lythrum salicaria L. | 23478 images |
| Lythrum tribracteatum Salzm. ex Spreng. | 84 images |
| Macadamia integrifolia Maiden & Betche | 316 images |
| Machaeranthera tagetina Greene | 4 images |
| Machaeranthera tanacetifolia (Kunth) Nees | 118 images |
| Maclura pomifera (Raf.) C.K.Schneid. | 3775 images |
| Macroptilium atropurpureum (DC.) Urb. | 273 images |
| Maculigilia maculata (Parish) V.E.Grant | 1 images |
| Madia elegans D.Don | 89 images |
| Madia exigua (Sm.) Greene | 1 images |
| Madia glomerata Hook. | 5 images |
| Madia gracilis (Sm.) D.D.Keck & J.C.Clausen ex Applegate | 3 images |
| Madia radiata Kellogg | 4 images |
| Madia sativa Molina | 76 images |
| Maianthemum dilatatum (Alph.Wood) A.Nelson & J.F.Macbr. | 33 images |
| Maianthemum racemosum (L.) Link | 1439 images |
| Maianthemum stellatum (L.) Link | 536 images |
| Malacothamnus aboriginum (B.L.Rob.) Greene | 12 images |
| Malacothamnus clementinus (Munz & I.M.Johnst.) Kearney | 8 images |
| Malacothamnus davidsonii (B.L.Rob.) Greene | 28 images |
| Malacothamnus densiflorus (S.Watson) Greene | 4 images |
| Malacothamnus fasciculatus (Nutt.) Greene | 6 images |
| Malacothamnus fremontii (A.Gray) Greene | 12 images |
| Malacothamnus jonesii (Munz) Kearney | 6 images |
| Malacothamnus palmeri (S.Watson) Greene | 5 images |
| Malacothrix californica DC. | 37 images |
| Malacothrix clevelandii (Greene) A.Gray | 1 images |
| Malacothrix fendleri A.Gray | 6 images |
| Malacothrix floccifera S.F.Blake | 18 images |
| Malacothrix glabrata A.Gray | 94 images |
| Malacothrix saxatilis Torr. & A.Gray | 24 images |
| Malacothrix sonchoides (Nutt.) Torr. & A.Gray | 8 images |
| Malacothrix torreyi A.Gray | 1 images |
| Malaxis monophyllos (L.) Sw. | 46 images |
| Malephora crocea (Jacq.) Schwantes | 2048 images |
| Malephora purpureocrocea (Haw.) Schwantes | 9 images |
| Malosma laurina (Nutt.) Abrams | 525 images |
| Malperia tenuis S.Watson | 10 images |
| Malus domestica (Suckow) Borkh. | 6975 images |
| Malus fusca (Raf.) C.K.Schneid. | 2 images |
| Malva arborea (L.) Webb & Berthel. | 6747 images |
| Malva assurgentiflora (Kellogg) M.F.Ray | 56 images |
| Malva multiflora (Cav.) Soldano, Banfi & Galasso | 652 images |
| Malva neglecta Wallr. | 5208 images |
| Malva nicaeensis All. | 159 images |
| Malva olbia (L.) Alef. | 1812 images |
| Malva parviflora L. | 2673 images |
| Malva sylvestris L. | 25631 images |
| Malva trimestris (L.) Salisb. | 2912 images |
| Malva verticillata L. | 205 images |
| Malvella lepidota (A.Gray) Fryxell | 1 images |
| Malvella leprosa (Ortega) Krapov. | 119 images |
| Mammillaria heyderi Muehlenpf. | 34 images |
| Mandevilla brachysiphon (Torr.) Pichon | 2 images |
| Mantisalca salmantica (L.) Briq. & Cavill. | 994 images |
| Marah fabacea (Naudin) Greene | 78 images |
| Marah macrocarpa (Greene) Greene | 47 images |
| Marah oregana (Torr. & A.Gray) Howell | 19 images |
| Marah watsonii (Cogn.) Greene | 3 images |
| Mariosousa heterophylla (Benth.) Seigler & Ebinger | 1 images |
| Marrubium vulgare L. | 4264 images |
| Matelea parvifolia (Torr.) Woodson | 13 images |
| Matricaria chamomilla L. | 9636 images |
| Matricaria discoidea DC. | 3408 images |
| Matricaria occidentalis Greene | 13 images |
| Matthiola incana (L.) W.T.Aiton | 154 images |
| Matthiola longipetala (Vent.) DC. | 508 images |
| Maurandella antirrhiniflora (Humb. & Bonpl. ex Willd.) Rothm. | 16 images |
| Mauranthemum paludosum (Poir.) Vogt & Oberpr. | 259 images |
| Maytenus boaria Molina | 309 images |
| Meconella oregana Nutt. | 17 images |
| Medicago arabica (L.) Huds. | 3315 images |
| Medicago falcata L. | 1177 images |
| Medicago lupulina L. | 6574 images |
| Medicago minima (L.) Bartal. | 28 images |
| Medicago orbicularis (L.) Bartal. | 726 images |
| Medicago polymorpha L. | 2670 images |
| Medicago praecox DC. | 40 images |
| Medicago rigidula (L.) All. | 205 images |
| Medicago sativa L. | 15852 images |
| Medicago truncatula Gaertn. | 157 images |
| Megathyrsus maximus (Jacq.) B.K.Simon & S.W.L.Jacobs | 173 images |
| Melaleuca citrina (Curtis) Dum.Cours. | 11021 images |
| Melaleuca viminalis (Sol. ex Gaertn.) Byrnes | 1637 images |
| Melampodium leucanthum Torr. & A.Gray | 70 images |
| Melampodium perfoliatum (Cav.) Kunth | 44 images |
| Melanocalyx uniflora (L.) Morin | 2 images |
| Melia azedarach L. | 10376 images |
| Melica californica Scribn. | 11 images |
| Melica frutescens Scribn. | 11 images |
| Melica geyeri Munro ex Bol. | 4 images |
| Melica harfordii Bol. | 5 images |
| Melica imperfecta Trin. | 11 images |
| Melica nitens (Scribn.) Nutt. ex Piper | 3 images |
| Melica porteri Scribn. | 1 images |
| Melica stricta Bol. | 11 images |
| Melica subulata (Griseb.) Scribn. | 2 images |
| Melica torreyana Scribn. | 9 images |
| Melilotus albus Medik. | 6714 images |
| Melilotus indicus (L.) All. | 2243 images |
| Melilotus officinalis (L.) Lam. | 3703 images |
| Melinis repens (Willd.) Zizka | 503 images |
| Melissa officinalis L. | 13179 images |
| Mentha × dumetorum Schult. | 1 images |
| Mentha × piperita L. | 3116 images |
| Mentha × rotundifolia (L.) Huds. | 918 images |
| Mentha × villosa Huds. | 320 images |
| Mentha arvensis L. | 2940 images |
| Mentha canadensis L. | 11 images |
| Mentha pulegium L. | 2513 images |
| Mentha spicata L. | 8527 images |
| Mentha suaveolens Ehrh. | 10761 images |
| Mentzelia affinis Greene | 9 images |
| Mentzelia aspera L. | 23 images |
| Mentzelia crocea Kellogg | 21 images |
| Mentzelia decapetala (Sims) Urb. | 9 images |
| Mentzelia dispersa S.Watson | 2 images |
| Mentzelia hirsutissima S.Watson | 1 images |
| Mentzelia involucrata S.Watson | 67 images |
| Mentzelia laevicaulis (Douglas ex Hook.) Torr. & A.Gray | 2 images |
| Mentzelia leucophylla Brandegee | 1 images |
| Mentzelia montana (Davidson) Davidson | 3 images |
| Mentzelia nitens Greene | 15 images |
| Mentzelia oligosperma Nutt. ex Sims | 1 images |
| Mentzelia oreophila J.Darl. | 19 images |
| Mentzelia pectinata Kellogg | 12 images |
| Mentzelia reflexa Coville | 16 images |
| Mentzelia torreyi A.Gray | 7 images |
| Mentzelia veatchiana Kellogg | 19 images |
| Menyanthes trifoliata L. | 1752 images |
| Mercurialis annua L. | 6806 images |
| Mertensia arizonica Greene | 3 images |
| Mertensia bella Piper | 4 images |
| Mertensia franciscana A.Heller | 11 images |
| Mertensia lanceolata (Pursh) DC. | 14 images |
| Mertensia longiflora Greene | 7 images |
| Mertensia macdougalii A.Heller | 9 images |
| Mertensia oblongifolia (Nutt.) G.Don | 26 images |
| Mesembryanthemum cordifolium L.f. | 6827 images |
| Mesembryanthemum crystallinum L. | 1063 images |
| Mesembryanthemum nodiflorum L. | 1535 images |
| Micranthes bryophora (A.Gray) Brouillet & Gornall | 27 images |
| Micranthes californica (Greene) Small | 93 images |
| Micranthes ferruginea (Graham) Brouillet & Gornall | 16 images |
| Micranthes howellii (Greene) Small | 4 images |
| Micranthes integrifolia (Hook.) Small | 28 images |
| Micranthes mertensiana (Bong.) Rosend. | 20 images |
| Micranthes nidifica (Greene) Small | 5 images |
| Micranthes oregana (Howell) Small | 60 images |
| Micranthes rhomboidea (Greene) Small | 15 images |
| Micranthes rufidula Small | 2 images |
| Micranthes tolmiei (Torr. & A.Gray) Brouillet & Gornall | 7 images |
| Microchloa kunthii Desv. | 79 images |
| Microseris alpestris (A.Gray) Q.Jones ex Cronquist | 21 images |
| Microseris bigelovii (A.Gray) Sch.Bip. | 2 images |
| Microseris borealis (Bong.) Sch.Bip. | 10 images |
| Microseris douglasii (DC.) Sch.Bip. | 13 images |
| Microseris heterocarpa (Nutt.) K.L.Chambers | 6 images |
| Microseris laciniata (Hook.) Sch.Bip. | 2 images |
| Microseris nutans (Hook.) Sch.Bip. | 7 images |
| Microseris troximoides A.Gray | 12 images |
| Microsteris gracilis (Hook.) Greene | 20 images |
| Milla biflora Cav. | 37 images |
| Mimetanthe pilosa (Benth.) Greene | 30 images |
| Mimosa aculeaticarpa Ortega | 36 images |
| Mimosa strigillosa Torr. & A.Gray | 3 images |
| Mimulus ringens L. | 435 images |
| Mirabilis albida (Walter) Heimerl | 45 images |
| Mirabilis alipes (S.Watson) Pils | 13 images |
| Mirabilis jalapa L. | 14829 images |
| Mirabilis laevis (Benth.) Curran | 176 images |
| Mirabilis linearis (Pursh) Heimerl | 13 images |
| Mirabilis longiflora L. | 252 images |
| Mirabilis melanotricha (Standl.) Spellenb. | 15 images |
| Mirabilis multiflora (Torr.) A.Gray | 147 images |
| Mirabilis nyctaginea (Michx.) MacMill. | 195 images |
| Miscanthus sinensis Andersson | 3308 images |
| Misopates orontium (L.) Raf. | 1713 images |
| Mitellastra caulescens (Nutt.) Howell | 2 images |
| Modiola caroliniana (L.) G.Don | 187 images |
| Moehringia lateriflora (L.) Fenzl | 42 images |
| Moehringia macrophylla (Hook.) Fenzl | 25 images |
| Moenchia erecta (L.) G.Gaertn., B.Mey. & Scherb. | 59 images |
| Mohavea breviflora Coville | 59 images |
| Mollugo verticillata L. | 317 images |
| Moluccella laevis L. | 268 images |
| Monarda citriodora Cerv. ex Lag. | 360 images |
| Monarda fistulosa L. | 2131 images |
| Monarda pectinata Nutt. | 8 images |
| Monardella australis Abrams | 2 images |
| Monardella candicans Benth. | 1 images |
| Monardella douglasii Benth. | 3 images |
| Monardella follettii (Jeps.) Jokerst | 3 images |
| Monardella linoides A.Gray | 2 images |
| Monardella macrantha A.Gray | 2 images |
| Monardella nana A.Gray | 1 images |
| Monardella odoratissima Benth. | 214 images |
| Monardella purpurea Howell | 25 images |
| Monardella undulata Benth. | 8 images |
| Monardella viridis Jeps. | 2 images |
| Moneses uniflora (L.) A.Gray | 306 images |
| Monnina wrightii A.Gray | 4 images |
| Monolopia gracilens A.Gray | 3 images |
| Monolopia lanceolata Nutt. | 18 images |
| Monolopia major DC. | 4 images |
| Monolopia stricta Crum | 3 images |
| Monoptilon bellioides H.M.Hall | 57 images |
| Monotropa hypopitys L. | 1051 images |
| Monotropa uniflora L. | 1084 images |
| Montia chamissoi (Ledeb. ex Spreng.) Greene | 4 images |
| Montia fontana L. | 272 images |
| Montia howellii S.Watson | 5 images |
| Montia linearis (Douglas) Greene | 13 images |
| Montia parvifolia (Moc. ex DC.) Greene | 18 images |
| Moringa oleifera Lam. | 1822 images |
| Morisonia atamisquea (Kuntze) Christenh. & Byng | 20 images |
| Mortonia scabrella A.Gray | 1 images |
| Mucronea californica Benth. | 1 images |
| Mucronea perfoliata (A.Gray) A.Heller | 9 images |
| Muehlenbeckia complexa (A.Cunn.) Meisn. | 1071 images |
| Muehlenbeckia hastulata (Sm.) I.M.Johnst. | 24 images |
| Muhlenbergia californica Vasey | 1 images |
| Muhlenbergia dumosa Scribn. ex Vasey | 5 images |
| Muhlenbergia emersleyi Vasey | 1 images |
| Muhlenbergia fragilis Swallen | 1 images |
| Muhlenbergia glomerata (Willd.) Trin. | 1 images |
| Muhlenbergia longiligula Hitchc. | 1 images |
| Muhlenbergia mexicana (L.) Trin. | 5 images |
| Muhlenbergia microsperma (DC.) Kunth | 4 images |
| Muhlenbergia pauciflora Buckley | 7 images |
| Muhlenbergia peruviana (P.Beauv.) Steud. | 5 images |
| Muhlenbergia porteri Scribn. | 10 images |
| Muhlenbergia pungens Thurb. | 1 images |
| Muhlenbergia rigens (Benth.) Hitchc. | 24 images |
| Muhlenbergia schreberi J.F.Gmel. | 5 images |
| Muhlenbergia torreyi (Kunth) Hitchc. ex Bush | 1 images |
| Muhlenbergia tricholepis (Torr.) P.M.Peterson | 3 images |
| Muilla coronata Greene | 6 images |
| Muilla maritima (Torr.) S.Watson ex Benth. | 31 images |
| Muscari botryoides (L.) Mill. | 5393 images |
| Myoporum laetum G.Forst. | 1561 images |
| Myoporum parvifolium R.Br. | 12 images |
| Myosotis discolor Pers. | 808 images |
| Myosotis latifolia Poir. | 487 images |
| Myosotis laxa Lehm. | 292 images |
| Myosotis scorpioides L. | 5636 images |
| Myosotis stricta Link ex Roem. & Schult. | 635 images |
| Myosotis sylvatica Ehrh. ex Hoffm. | 421 images |
| Myosotis verna Nutt. | 12 images |
| Myrica californica Cham. | 32 images |
| Myrica hartwegii S.Watson | 12 images |
| Myriophyllum aquaticum (Vell.) Verdc. | 567 images |
| Myriophyllum quitense Kunth | 12 images |
| Myriophyllum sibiricum Kom. | 7 images |
| Myriophyllum spicatum L. | 289 images |
| Myriophyllum verticillatum L. | 67 images |
| Myrtus communis L. | 9037 images |
| Najas gracillima (A.Braun ex Engelm.) Magnus | 1 images |
| Najas guadalupensis (Spreng.) Magnus | 14 images |
| Najas marina L. | 114 images |
| Najas minor All. | 22 images |
| Nama lobbii A.Gray | 11 images |
| Nama rothrockii A.Gray | 13 images |
| Narcissus jonquilla L. | 2009 images |
| Narcissus papyraceus Ker Gawl. | 1252 images |
| Narcissus poeticus L. | 2877 images |
| Narcissus tazetta L. | 3109 images |
| Narthecium californicum Baker | 13 images |
| Nassella cernua (Stebbins & Love) Barkworth | 2 images |
| Nassella lepida (Hitchc.) Barkworth | 8 images |
| Nassella pulchra (Hitchc.) Barkworth | 19 images |
| Nassella tenuissima (Trin.) Barkworth | 1148 images |
| Nasturtium gambelii (S.Watson) O.E.Schulz | 2 images |
| Nasturtium officinale W.T.Aiton | 648 images |
| Navarretia breweri (A.Gray) Greene | 21 images |
| Navarretia capillaris (Kellogg) Kuntze | 4 images |
| Navarretia divaricata Greene | 2 images |
| Navarretia hamata Greene | 5 images |
| Navarretia heterandra H.Mason | 4 images |
| Navarretia heterodoxa (Greene) Greene | 2 images |
| Navarretia intertexta (Benth.) Hook. | 26 images |
| Navarretia leptalea (A.Gray) L.A.Johnson | 42 images |
| Navarretia leucocephala Benth. | 28 images |
| Navarretia nigelliformis Greene | 8 images |
| Navarretia prolifera Greene | 1 images |
| Navarretia rosulata Brand | 6 images |
| Navarretia setiloba Coville | 21 images |
| Navarretia squarrosa (Eschsch.) Hook. & Arn. | 4 images |
| Navarretia subuligera Greene | 2 images |
| Navarretia tagetina Greene | 3 images |
| Navarretia viscidula Benth. | 6 images |
| Nemacaulis denudata Nutt. | 40 images |
| Nemacladus glandulifer Jeps. | 21 images |
| Nemacladus rigidus Curran | 9 images |
| Nemacladus tenuis (McVaugh) Morin | 14 images |
| Nemophila breviflora A.Gray | 2 images |
| Nemophila maculata Benth. ex Lindl. | 393 images |
| Nemophila menziesii Hook. & Arn. | 375 images |
| Nemophila parviflora Douglas ex Benth. | 13 images |
| Nemophila pedunculata Douglas ex Benth. | 6 images |
| Nemophila pulchella Eastw. | 5 images |
| Nemophila spatulata Coville | 16 images |
| Neogaerrhinum filipes (A.Gray) Rothm. | 18 images |
| Neogaerrhinum strictum (Hook. & Arn.) Rothm. | 3 images |
| Neostapfia colusana (Burtt Davy) Burtt Davy | 15 images |
| Neottia banksiana (Lindl.) Rchb.f. | 2 images |
| Neottia convallarioides (Sw.) Rich. | 4 images |
| Neottia cordata (L.) Rich. | 212 images |
| Nepeta cataria L. | 3653 images |
| Nephrolepis cordifolia (L.) C.Presl | 652 images |
| Nephrolepis exaltata (L.) Schott | 2922 images |
| Nestotus stenophyllus (A.Gray) R.P.Roberts, Urbatsch & Neubig | 9 images |
| Neviusia cliftonii Shevock, Ertter & D.W.Taylor | 3 images |
| Nicolletia occidentalis A.Gray | 14 images |
| Nicotiana obtusifolia M.Martens & Galeotti | 1 images |
| Nicotiana quadrivalvis Pursh | 59 images |
| Nissolia platycalyx S.Watson | 1 images |
| Noccaea fendleri (A.Gray) Holub | 36 images |
| Nolina bigelovii (Torr.) S.Watson | 2 images |
| Nolina cismontana Dice | 3 images |
| Nolina microcarpa S.Watson | 12 images |
| Nolina parryi S.Watson | 19 images |
| Nothochelone nemorosa (Douglas ex Lindl.) Straw | 35 images |
| Notholithocarpus densiflorus (Hook. & Arn.) Manos, Cannon & S.H.Oh | 17 images |
| Nothoscordum bivalve (L.) Britton | 617 images |
| Nothoscordum gracile (Aiton) Stearn | 733 images |
| Nuphar polysepala Engelm. | 2 images |
| Nuttallanthus canadensis (L.) D.A.Sutton | 15 images |
| Nymphaea mexicana Zucc. | 173 images |
| Nymphaea odorata Aiton | 404 images |
| Nymphoides peltata (S.G.Gmel.) Kuntze | 441 images |
| Odontarrhena muralis (Waldst. & Kit.) Endl. | 125 images |
| Odontostomum hartwegii Torr. | 10 images |
| Oemleria cerasiformis (Torr. & A.Gray ex Hook. & Arn.) J.W.Landon | 261 images |
| Oenanthe pimpinelloides L. | 639 images |
| Oenanthe sarmentosa C.Presl ex DC. | 76 images |
| Oenothera albicaulis Pursh | 53 images |
| Oenothera biennis L. | 14302 images |
| Oenothera brachycarpa A.Gray | 4 images |
| Oenothera cavernae Munz | 7 images |
| Oenothera cespitosa Nutt. | 45 images |
| Oenothera elata Kunth | 184 images |
| Oenothera flava (A.Nelson) Garrett | 39 images |
| Oenothera glazioviana Micheli | 7362 images |
| Oenothera hartwegii Benth. | 63 images |
| Oenothera havardii S.Watson | 2 images |
| Oenothera howardii (A.Nelson) M.E.Jones ex Prain | 18 images |
| Oenothera laciniata Hill | 553 images |
| Oenothera lavandulifolia Torr. & A.Gray | 3 images |
| Oenothera neomexicana (Small) Munz | 20 images |
| Oenothera pallida Lindl. | 38 images |
| Oenothera primiveris A.Gray | 32 images |
| Oenothera rosea L'Hér. ex Aiton | 1349 images |
| Oenothera stricta Ledeb. ex Link | 605 images |
| Oenothera suffrutescens (Moc. & Sessé ex Ser.) W.L.Wagner & Hoch | 84 images |
| Oenothera toumeyi (Small) Tidestr. | 2 images |
| Oenothera villosa Thunb. | 70 images |
| Oenothera xylocarpa Coville | 15 images |
| Oligomeris linifolia (Vahl ex Hornem.) J.F.Macbr. | 10 images |
| Olneya tesota A.Gray | 11 images |
| Oloptum miliaceum (L.) Röser & Hamasha | 738 images |
| Olsynium douglasii (A.Dietr.) E.P.Bicknell | 8 images |
| Onobrychis viciifolia Scop. | 7219 images |
| Onopordum acanthium L. | 4870 images |
| Onopordum illyricum L. | 1154 images |
| Onopordum tauricum Willd. | 471 images |
| Ophioglossum californicum Prantl | 12 images |
| Ophioglossum engelmannii Prantl | 12 images |
| Ophioglossum polyphyllum A.Braun ex Seub. | 1 images |
| Ophioglossum pusillum Raf. | 4 images |
| Ophioglossum vulgatum L. | 341 images |
| Opuntia × vaseyi (J.M.Coult.) Britton & Rose | 1 images |
| Opuntia aurea E.M.Baxter | 6 images |
| Opuntia basilaris Engelm. & J.M.Bigelow | 11 images |
| Opuntia camanchica Engelm. & J.M.Bigelow | 2 images |
| Opuntia chlorotica Engelm. & J.M.Bigelow | 3 images |
| Opuntia engelmannii Salm-Dyck ex Engelm. | 640 images |
| Opuntia ficus-indica (L.) Mill. | 6523 images |
| Opuntia fragilis (Nutt.) Haw. | 164 images |
| Opuntia gosseliniana F.A.C.Weber | 5 images |
| Opuntia littoralis (Engelm.) Cockerell | 363 images |
| Opuntia macrocentra Engelm. | 217 images |
| Opuntia macrorhiza Engelm. | 69 images |
| Opuntia microdasys (Lehm.) Pfeiff. | 4866 images |
| Opuntia orbiculata Salm-Dyck ex Pfeiff. | 78 images |
| Opuntia oricola Philbrick | 66 images |
| Opuntia phaeacantha Engelm. | 491 images |
| Opuntia pinkavae B.D.Parfitt | 1 images |
| Opuntia polyacantha Haw. | 471 images |
| Orcuttia californica Vasey | 2 images |
| Orcuttia tenuis Hitchc. | 2 images |
| Oreocarya confertiflora Greene | 67 images |
| Oreocarya humilis (A.Gray) Greene | 16 images |
| Oreocarya spiculifera Piper | 1 images |
| Oreochrysum parryi Rydb. | 8 images |
| Oreonana purpurascens Shevock & Constance | 4 images |
| Oreostemma alpigenum (Torr. & A.Gray) Greene | 15 images |
| Oreostemma elatum Greene | 6 images |
| Origanum vulgare L. | 19309 images |
| Ornithogalum umbellatum L. | 8446 images |
| Ornithopus pinnatus (Mill.) Druce | 118 images |
| Ornithopus sativus Brot. | 167 images |
| Ornithostaphylos oppositifolia (Parry) Small | 12 images |
| Orobanche californica Cham. & Schltdl. | 2 images |
| Orobanche cooperi (A.Gray) A.Heller | 35 images |
| Orobanche fasciculata Nutt. | 136 images |
| Orobanche parishii (Jeps.) Heckard | 43 images |
| Orobanche pinorum Geyer ex Hook. | 3 images |
| Orobanche ramosa L. | 458 images |
| Orobanche uniflora L. | 114 images |
| Orobanche valida Jeps. | 2 images |
| Orobanche vallicola (Jeps.) Heckard | 1 images |
| Orthilia secunda (L.) House | 466 images |
| Orthocarpus bracteosus Benth. | 5 images |
| Orthocarpus cuspidatus Greene | 29 images |
| Orthocarpus imbricatus S.Watson | 2 images |
| Orthocarpus luteus Nutt. | 4 images |
| Orthocarpus pachystachyus A.Gray | 1 images |
| Oryza rufipogon Griff. | 1 images |
| Oryza sativa L. | 457 images |
| Osmorhiza berteroi DC. | 8 images |
| Osmorhiza brachypoda Torr. ex Durand | 1 images |
| Osmorhiza depauperata Phil. | 7 images |
| Osmorhiza occidentalis (Nutt.) Torr. | 16 images |
| Osmorhiza purpurea (J.M.Coult. & Rose) Suksd. | 5 images |
| Osteospermum moniliferum L. | 130 images |
| Ottelia alismoides (L.) Pers. | 20 images |
| Oxalis articulata Savigny | 5226 images |
| Oxalis bowiei W.T.Aiton ex G.Don | 2 images |
| Oxalis corniculata L. | 9039 images |
| Oxalis debilis Kunth | 2916 images |
| Oxalis decaphylla Kunth | 8 images |
| Oxalis dillenii Jacq. | 2433 images |
| Oxalis hirta L. | 1 images |
| Oxalis incarnata L. | 453 images |
| Oxalis latifolia Kunth | 2521 images |
| Oxalis oregana Nutt. | 394 images |
| Oxalis pes-caprae L. | 7666 images |
| Oxalis purpurea L. | 296 images |
| Oxalis stricta L. | 2346 images |
| Oxalis suksdorfii Trel. | 19 images |
| Oxalis trilliifolia Hook. | 15 images |
| Oxybasis chenopodioides (L.) S.Fuentes, Uotila & Borsch | 80 images |
| Oxybasis glauca (L.) S.Fuentes, Uotila & Borsch | 246 images |
| Oxybasis rubra (L.) S.Fuentes, Uotila & Borsch | 641 images |
| Oxypolis fendleri (A.Gray) A.Heller | 7 images |
| Oxypolis occidentalis J.M.Coult. & Rose | 12 images |
| Oxyria digyna (L.) Hill | 398 images |
| Oxytropis deflexa (Pall.) DC. | 14 images |
| Oxytropis lambertii Pursh | 48 images |
| Oxytropis oreophila A.Gray | 1 images |
| Ozomelis stauropetala (Piper) Rydb. | 9 images |
| Ozomelis trifida (Graham) Rydb. | 7 images |
| Paeonia brownii Douglas ex Hook. | 43 images |
| Paeonia californica Nutt. | 103 images |
| Panicum capillare L. | 663 images |
| Panicum dichotomiflorum Michx. | 79 images |
| Panicum miliaceum L. | 1212 images |
| Panicum repens L. | 80 images |
| Panicum urvilleanum Kunth | 1 images |
| Panicum virgatum L. | 933 images |
| Papaver orientale L. | 4323 images |
| Papaver rhoeas L. | 12044 images |
| Papaver somniferum L. | 10179 images |
| Pappophorum mucronulatum Nees | 3 images |
| Pappostipa speciosa (Trin. & Rupr.) Romasch. | 9 images |
| Parapholis cylindrica (Willd.) Romero Zarco | 20 images |
| Parapholis incurva (L.) C.E.Hubb. | 84 images |
| Parapholis strigosa (Dumort.) C.E.Hubb. | 18 images |
| Parentucellia latifolia (L.) Caruel | 573 images |
| Parentucellia viscosa (L.) Caruel | 966 images |
| Parietaria judaica L. | 5185 images |
| Parietaria pensylvanica Muhl. ex Willd. | 181 images |
| Parkinsonia aculeata L. | 2034 images |
| Parkinsonia florida (Benth. ex A.Gray) S.Watson | 20 images |
| Parkinsonia microphylla Torr. | 13 images |
| Parnassia cirrata Piper | 15 images |
| Parnassia fimbriata K.D.Koenig | 42 images |
| Parnassia palustris L. | 4235 images |
| Paronychia ahartii Ertter | 1 images |
| Paronychia echinulata Chater | 17 images |
| Paronychia pulvinata A.Gray | 1 images |
| Paronychia sessiliflora Nutt. | 3 images |
| Parthenium confertum A.Gray | 4 images |
| Parthenium incanum Kunth | 31 images |
| Parthenocissus quinquefolia (L.) Planch. | 15663 images |
| Parthenocissus vitacea (Knerr) Hitchc. | 3 images |
| Paspalum conjugatum P.J.Bergius | 31 images |
| Paspalum dilatatum Poir. | 1172 images |
| Paspalum distichum L. | 256 images |
| Paspalum setaceum Michx. | 13 images |
| Paspalum urvillei Steud. | 90 images |
| Passiflora arida (Mast. & Rose) Killip | 2 images |
| Passiflora bryonioides Kunth | 4 images |
| Passiflora caerulea L. | 15314 images |
| Passiflora mexicana Juss. | 2 images |
| Passiflora tarminiana Coppens & V.E.Barney | 9 images |
| Pastinaca sativa L. | 6278 images |
| Paxistima myrsinites (Pursh) Raf. | 86 images |
| Pectiantia pentandra (Hook.) Rydb. | 22 images |
| Pectis angustifolia Torr. | 6 images |
| Pectis linifolia L. | 2 images |
| Pectis papposa Harv. & A.Gray | 10 images |
| Pectis prostrata Cav. | 32 images |
| Pectocarya peninsularis I.M.Johnst. | 5 images |
| Pectocarya setosa A.Gray | 21 images |
| Pedicularis attollens A.Gray | 71 images |
| Pedicularis bracteosa Benth. | 47 images |
| Pedicularis centranthera A.Gray | 10 images |
| Pedicularis contorta Benth. | 23 images |
| Pedicularis crenulata Benth. | 6 images |
| Pedicularis densiflora Benth. | 75 images |
| Pedicularis dudleyi Elmer | 6 images |
| Pedicularis groenlandica Retz. | 127 images |
| Pedicularis parryi A.Gray | 10 images |
| Pedicularis procera A.Gray | 4 images |
| Pedicularis racemosa Douglas ex Benth. | 43 images |
| Pedicularis semibarbata A.Gray | 49 images |
| Pediocactus bradyi L.D.Benson | 6 images |
| Pediocactus paradinei B.W.Benson | 5 images |
| Pediocactus peeblesianus (Croizat) L.D.Benson | 10 images |
| Pediocactus sileri (Daul) L.D.Benson | 3 images |
| Pediocactus simpsonii (Engelm.) Britton & Rose | 21 images |
| Peganum harmala L. | 375 images |
| Pelargonium capitatum (L.) L'Hér. | 89 images |
| Pelargonium grossularioides (L.) L'Hér. | 1 images |
| Pelargonium inodorum Willd. | 29 images |
| Pelargonium inquinans (L.) L'Hér. | 2573 images |
| Pelargonium panduriforme Eckl. & Zeyh. | 44 images |
| Pelargonium peltatum (L.) L'Hér. | 2202 images |
| Pelargonium quercifolium (L.f.) L'Hér. | 140 images |
| Pelargonium vitifolium (L.) L'Hér. | 11 images |
| Pelargonium zonale (L.) L'Hér. | 4409 images |
| Peltandra virginica (L.) Schott | 145 images |
| Peltophorum africanum Sond. | 160 images |
| Peniocereus greggii (Engelm.) Britton & Rose | 33 images |
| Peniocereus striatus (Brandegee) Buxb. | 2 images |
| Penstemon acuminatus Douglas ex Lindl. | 13 images |
| Penstemon ambiguus Torr. | 19 images |
| Penstemon anguineus Eastw. | 10 images |
| Penstemon angustifolius Nutt. ex Pursh | 5 images |
| Penstemon azureus Benth. | 8 images |
| Penstemon barbatus (Cav.) Roth | 926 images |
| Penstemon caespitosus Nutt. ex A.Gray | 9 images |
| Penstemon calcareus Brandegee | 6 images |
| Penstemon carnosus Pennell | 3 images |
| Penstemon centranthifolius (Benth.) Benth. | 85 images |
| Penstemon clevelandii A.Gray | 46 images |
| Penstemon cobaea Nutt. | 161 images |
| Penstemon concinnus D.D.Keck | 4 images |
| Penstemon cyananthus Hook. | 35 images |
| Penstemon dasyphyllus A.Gray | 4 images |
| Penstemon davidsonii Greene | 92 images |
| Penstemon deustus Douglas | 54 images |
| Penstemon eatonii A.Gray | 83 images |
| Penstemon eriantherus Nutt. ex Pursh | 8 images |
| Penstemon filiformis (D.D.Keck) D.D.Keck | 8 images |
| Penstemon floridus Brandegee | 4 images |
| Penstemon fruticiformis Coville | 23 images |
| Penstemon gracilentus A.Gray | 39 images |
| Penstemon grinnellii Eastw. | 74 images |
| Penstemon heterodoxus A.Gray | 49 images |
| Penstemon heterophyllus Lindl. | 104 images |
| Penstemon humilis Nutt. ex A.Gray | 32 images |
| Penstemon incertus Brandegee | 5 images |
| Penstemon laetus A.Gray | 47 images |
| Penstemon laevis Pennell | 22 images |
| Penstemon leiophyllus Pennell | 19 images |
| Penstemon lentus Pennell | 8 images |
| Penstemon linarioides A.Gray | 19 images |
| Penstemon monoensis A.Heller | 13 images |
| Penstemon montanus Greene | 8 images |
| Penstemon neotericus D.D.Keck | 4 images |
| Penstemon newberryi A.Gray | 143 images |
| Penstemon pachyphyllus A.Gray ex Rydb. | 5 images |
| Penstemon palmeri A.Gray | 100 images |
| Penstemon parryi A.Gray | 36 images |
| Penstemon personatus D.D.Keck | 8 images |
| Penstemon petiolatus Brandegee | 3 images |
| Penstemon pinifolius Greene | 21 images |
| Penstemon platyphyllus Rydb. | 3 images |
| Penstemon procerus Douglas ex Graham | 63 images |
| Penstemon pseudoputus (Crosswh.) N.H.Holmgren | 4 images |
| Penstemon pseudospectabilis M.E.Jones | 1 images |
| Penstemon purpusii Brandegee | 4 images |
| Penstemon rattanii A.Gray | 4 images |
| Penstemon roezlii Regel | 30 images |
| Penstemon rostriflorus Kellogg | 85 images |
| Penstemon rupicola (Piper) Howell | 28 images |
| Penstemon rydbergii A.Nelson | 78 images |
| Penstemon scapoides D.D.Keck | 15 images |
| Penstemon scariosus Pennell | 5 images |
| Penstemon sepalulus A.Nelson | 5 images |
| Penstemon speciosus Douglas | 124 images |
| Penstemon spectabilis Thurb. ex A.Gray | 115 images |
| Penstemon stephensii Brandegee | 4 images |
| Penstemon strictus Benth. | 132 images |
| Penstemon subglaber Rydb. | 2 images |
| Penstemon thompsoniae (A.Gray) Rydb. | 3 images |
| Penstemon thurberi Torr. | 8 images |
| Penstemon tracyi D.D.Keck | 5 images |
| Penstemon uintahensis Pennell | 4 images |
| Penstemon utahensis Eastw. | 48 images |
| Penstemon venustus Douglas | 3 images |
| Penstemon virgatus A.Gray | 9 images |
| Penstemon watsonii A.Gray | 12 images |
| Penstemon whippleanus A.Gray | 45 images |
| Pentachaeta aurea Nutt. | 4 images |
| Pentachaeta bellidiflora Greene | 12 images |
| Pentachaeta exilis A.Gray | 1 images |
| Pentachaeta lyonii A.Gray | 3 images |
| Pentaglottis sempervirens (L.) Tausch ex L.H.Bailey | 6202 images |
| Pentzia incana (Thunb.) Kuntze | 16 images |
| Pericallis cruenta Webb & Berthel. | 6 images |
| Pericome caudata A.Gray | 16 images |
| Perideridia bacigalupii T.I.Chuang & Constance | 1 images |
| Perideridia bolanderi (A.Gray) A.Nelson & J.F.Macbr. | 22 images |
| Perideridia californica (Torr.) A.Nelson & J.F.Macbr. | 12 images |
| Perideridia gairdneri (Hook. & Arn.) Mathias | 2 images |
| Perideridia howellii (J.M.Coult. & Rose) Mathias | 4 images |
| Perideridia kelloggii (A.Gray) Mathias | 17 images |
| Perideridia lemmonii (J.M.Coult. & Rose) T.I.Chuang & Constance | 10 images |
| Perideridia oregana (Nutt.) Mathias | 7 images |
| Perideridia parishii (J.M.Coult. & Rose) A.Nelson & J.F.Macbr. | 18 images |
| Perityle emoryi Torr. | 93 images |
| Perityle megalocephala (S.Watson) J.F.Macbr. | 2 images |
| Perityle microglossa Benth. | 8 images |
| Perityle villosa (S.F.Blake) Shinners | 2 images |
| Persicaria amphibia (L.) Delarbre | 393 images |
| Persicaria capitata (Buch.-Ham. ex D.Don) H.Gross | 2093 images |
| Persicaria hydropiper (L.) Delarbre | 650 images |
| Persicaria hydropiperoides (Michx.) Small | 18 images |
| Persicaria lapathifolia (L.) Delarbre | 3170 images |
| Persicaria maculosa Gray | 9314 images |
| Persicaria orientalis (L.) Spach | 2696 images |
| Persicaria pensylvanica (L.) M.Gómez | 50 images |
| Persicaria punctata (Elliott) Small | 77 images |
| Petalonyx nitidus S.Watson | 19 images |
| Petalonyx thurberi A.Gray | 80 images |
| Petasites frigidus (L.) Fr. | 233 images |
| Petradoria pumila (Nutt.) Greene | 9 images |
| Petrophytum caespitosum (Nutt.) Rydb. | 22 images |
| Petrorhagia dubia (Raf.) G.López & Romo | 62 images |
| Petrorhagia nanteuilii (Burnat) P.W.Ball & Heywood | 119 images |
| Petroselinum crispum (Mill.) Fuss | 2517 images |
| Peucephyllum schottii A.Gray | 16 images |
| Phacelia affinis A.Gray | 11 images |
| Phacelia alba Rydb. | 1 images |
| Phacelia bicolor Torr. ex S.Watson | 40 images |
| Phacelia bolanderi A.Gray | 20 images |
| Phacelia brachyloba (Benth.) A.Gray | 11 images |
| Phacelia breweri A.Gray | 24 images |
| Phacelia californica Cham. | 134 images |
| Phacelia calthifolia Brand | 68 images |
| Phacelia campanularia A.Gray | 213 images |
| Phacelia cephalotes A.Gray | 31 images |
| Phacelia cicutaria Greene | 140 images |
| Phacelia ciliata Benth. | 21 images |
| Phacelia coerulea Greene | 12 images |
| Phacelia congdonii Greene | 9 images |
| Phacelia corymbosa Jeps. | 7 images |
| Phacelia crenulata Torr. ex S.Watson | 142 images |
| Phacelia cryptantha Greene | 32 images |
| Phacelia davidsonii A.Gray | 4 images |
| Phacelia distans Benth. | 146 images |
| Phacelia divaricata (Benth.) A.Gray | 29 images |
| Phacelia douglasii (Benth.) Torr. | 10 images |
| Phacelia eisenii Brandegee | 6 images |
| Phacelia floribunda Greene | 6 images |
| Phacelia fremontii Torr. | 101 images |
| Phacelia grandiflora (Benth.) A.Gray | 52 images |
| Phacelia grisea A.Gray | 2 images |
| Phacelia gymnoclada Torr. ex S.Watson | 10 images |
| Phacelia hastata Douglas ex Lehm. | 88 images |
| Phacelia heterophylla Pursh | 57 images |
| Phacelia hydrophylloides Torr. ex A.Gray | 6 images |
| Phacelia imbricata Greene | 44 images |
| Phacelia incana Brand | 1 images |
| Phacelia insularis Munz | 2 images |
| Phacelia integrifolia Torr. | 19 images |
| Phacelia ivesiana Torr. | 4 images |
| Phacelia lemmonii A.Gray | 3 images |
| Phacelia linearis (Pursh) Holz. | 59 images |
| Phacelia longipes Torr. ex A.Gray | 2 images |
| Phacelia malvifolia Cham. & Schltdl. | 21 images |
| Phacelia monoensis Halse | 9 images |
| Phacelia mutabilis Greene | 42 images |
| Phacelia nashiana Jeps. | 33 images |
| Phacelia nemoralis Greene | 16 images |
| Phacelia neomexicana Thurb. ex Torr. | 5 images |
| Phacelia novenmillensis Munz | 6 images |
| Phacelia pachyphylla A.Gray | 1 images |
| Phacelia parishii A.Gray | 4 images |
| Phacelia parryi Torr. | 74 images |
| Phacelia pedicellata A.Gray | 31 images |
| Phacelia perityloides Coville | 21 images |
| Phacelia phacelioides (Benth.) Brand | 14 images |
| Phacelia platyloba A.Gray | 1 images |
| Phacelia pringlei A.Gray | 11 images |
| Phacelia procera A.Gray | 5 images |
| Phacelia pulchella A.Gray | 2 images |
| Phacelia purpusii Brandegee | 1 images |
| Phacelia ramosissima Douglas ex Lehm. | 90 images |
| Phacelia rattanii A.Gray | 2 images |
| Phacelia rotundifolia Torr. ex S.Watson | 15 images |
| Phacelia rupestris Greene | 3 images |
| Phacelia scopulina (A.Nelson) J.T.Howell | 4 images |
| Phacelia sericea (Graham) A.Gray | 44 images |
| Phacelia stellaris Brand | 5 images |
| Phacelia suaveolens Greene | 4 images |
| Phacelia tanacetifolia Benth. | 15837 images |
| Phacelia thermalis Greene | 1 images |
| Phacelia vallicola Congdon ex Brand | 1 images |
| Phacelia vallis-mortae J.W.Voss | 3 images |
| Phacelia viscida (Benth. ex Lindl.) Torr. | 17 images |
| Phalacroseris bolanderi A.Gray | 9 images |
| Phalaris angusta Nees ex Trin. | 6 images |
| Phalaris aquatica L. | 231 images |
| Phalaris arundinacea L. | 2793 images |
| Phalaris brachystachys Link | 9 images |
| Phalaris canariensis L. | 454 images |
| Phalaris coerulescens Desf. | 160 images |
| Phalaris lemmonii Vasey | 1 images |
| Phalaris minor Retz. | 172 images |
| Phalaris paradoxa L. | 78 images |
| Phaseolus pedicellatus Benth. | 5 images |
| Phemeranthus brevicaulis (S.Watson) Kiger | 3 images |
| Phemeranthus brevifolius (Torr.) Hershk. | 2 images |
| Phemeranthus parviflorus (Nutt.) Kiger | 7 images |
| Philadelphus lewisii Pursh | 732 images |
| Philadelphus microphyllus A.Gray | 15 images |
| Philadelphus serpyllifolius A.Gray | 1 images |
| Phleum alpinum L. | 313 images |
| Phleum pratense L. | 2555 images |
| Phlox adsurgens Torr. ex A.Gray | 11 images |
| Phlox austromontana Coville | 56 images |
| Phlox caespitosa Nutt. | 24 images |
| Phlox condensata (A.Gray) E.E.Nelson | 7 images |
| Phlox diffusa Benth. | 188 images |
| Phlox dolichantha A.Gray | 4 images |
| Phlox douglasii Hook. | 4 images |
| Phlox griseola Wherry | 4 images |
| Phlox hoodii Richardson | 72 images |
| Phlox kelseyi Britton | 3 images |
| Phlox longifolia Nutt. | 106 images |
| Phlox nana Nutt. | 9 images |
| Phlox paniculata L. | 5996 images |
| Phlox pulvinata (Wherry) Cronquist | 13 images |
| Phlox speciosa Pursh | 83 images |
| Phlox subulata L. | 4975 images |
| Phoenicaulis cheiranthoides Nutt. | 37 images |
| Phoenix dactylifera L. | 2921 images |
| Pholisma arenarium Nutt. | 35 images |
| Pholisma sonorae (Torr.) Yatsk. | 10 images |
| Pholistoma auritum (Lindl.) Lilja | 71 images |
| Pholistoma membranaceum (Benth.) Constance | 44 images |
| Pholistoma racemosum (Nutt. ex A.Gray) Constance | 23 images |
| Phoradendron californicum Nutt. | 131 images |
| Phoradendron macrophyllum (Engelm.) Cockerell | 4 images |
| Phoradendron villosum (Nutt.) Nutt. ex Engelm. | 2 images |
| Photinia arbutifolia Lindl. | 145 images |
| Phragmites australis (Cav.) Trin. ex Steud. | 6451 images |
| Phyla cuneifolia (Torr.) Greene | 1 images |
| Phyla lanceolata (Michx.) Greene | 124 images |
| Phyla nodiflora (L.) Greene | 1497 images |
| Phyllanthus polygonoides Nutt. ex Spreng. | 29 images |
| Phyllospadix scouleri Hook. | 22 images |
| Phyllostachys aurea (André) Rivière & C.Rivière | 1367 images |
| Phyllostachys reticulata (Rupr.) K.Koch | 98 images |
| Physalis acutifolia (Miers) Sandwith | 3 images |
| Physalis angulata L. | 1005 images |
| Physalis crassifolia Benth. | 89 images |
| Physalis longifolia Nutt. | 221 images |
| Physalis philadelphica Lam. | 662 images |
| Physalis pubescens L. | 172 images |
| Physalis pumila Nutt. | 10 images |
| Physaria chambersii Rollins | 32 images |
| Physaria fendleri (A.Gray) O'Kane & Al-Shehbaz | 1 images |
| Physocarpus alternans (M.E.Jones) J.T.Howell | 1 images |
| Physocarpus capitatus (Pursh) Kuntze | 449 images |
| Physocarpus malvaceus (Greene) Kuntze | 6 images |
| Physocarpus monogynus (Torr.) J.M.Coult. | 2 images |
| Physocarpus opulifolius (L.) Maxim. | 4514 images |
| Phytolacca americana L. | 18449 images |
| Phytolacca icosandra L. | 104 images |
| Phytolacca octandra L. | 21 images |
| Picea breweriana S.Watson | 101 images |
| Picea engelmannii Parry ex Engelm. | 206 images |
| Picea pungens Engelm. | 5352 images |
| Picea sitchensis (Bong.) Carrière | 1046 images |
| Picradeniopsis absinthifolia (Benth.) B.G.Baldwin | 8 images |
| Picradeniopsis multiflora (Hook. & Arn.) B.G.Baldwin | 23 images |
| Pilosella aurantiaca (L.) F.W.Schultz & Sch.Bip. | 7848 images |
| Pilostyles thurberi A.Gray | 25 images |
| Pilularia americana A.Braun | 1 images |
| Pinaropappus roseus (Less.) Less. | 38 images |
| Pinellia ternata (Thunb.) Makino | 7 images |
| Pinus albicaulis Engelm. | 117 images |
| Pinus aristata Engelm. | 231 images |
| Pinus arizonica Engelm. | 18 images |
| Pinus attenuata Lemmon | 62 images |
| Pinus balfouriana Balf. | 36 images |
| Pinus cembroides Zucc. | 54 images |
| Pinus contorta Douglas ex Loudon | 538 images |
| Pinus coulteri D.Don | 52 images |
| Pinus edulis Engelm. | 136 images |
| Pinus engelmannii Carrière | 1 images |
| Pinus flexilis E.James | 57 images |
| Pinus jeffreyi Balf. | 43 images |
| Pinus lambertiana Douglas | 133 images |
| Pinus leiophylla Schiede ex Schltdl. & Cham. | 7 images |
| Pinus longaeva D.K.Bailey | 12 images |
| Pinus monophylla Torr. & Frém. | 30 images |
| Pinus monticola Douglas ex D.Don | 21 images |
| Pinus muricata D.Don | 21 images |
| Pinus ponderosa Douglas ex C.Lawson | 444 images |
| Pinus quadrifolia Parl. ex Sudw. | 20 images |
| Pinus radiata D.Don | 341 images |
| Pinus sabiniana Douglas | 24 images |
| Pinus torreyana Parry ex Carrière | 39 images |
| Piptochaetium stipoides (Trin. & Rupr.) Hack. & Arechav. | 2 images |
| Pistacia atlantica Desf. | 548 images |
| Pistacia chinensis Bunge | 242 images |
| Pittosporum crassifolium Banks & Sol. ex A.Cunn. | 172 images |
| Pittosporum tenuifolium Gaertn. | 1721 images |
| Pittosporum tobira (Thunb.) W.T.Aiton | 14609 images |
| Pittosporum undulatum Vent. | 1600 images |
| Plagiobothrys acanthocarpus (Piper) I.M.Johnst. | 5 images |
| Plagiobothrys arizonicus (A.Gray) Greene ex A.Gray | 10 images |
| Plagiobothrys bracteatus (Howell) I.M.Johnst. | 10 images |
| Plagiobothrys canescens Benth. | 12 images |
| Plagiobothrys chorisianus (Cham.) I.M.Johnst. | 7 images |
| Plagiobothrys mollis (A.Gray) I.M.Johnst. | 6 images |
| Plagiobothrys nothofulvus (A.Gray) A.Gray | 52 images |
| Plagiobothrys parishii I.M.Johnst. | 6 images |
| Plagiobothrys stipitatus (Greene) I.M.Johnst. | 7 images |
| Plagiobothrys tenellus (Nutt.) A.Gray | 6 images |
| Plantago aristata Michx. | 25 images |
| Plantago australis Lam. | 116 images |
| Plantago coronopus L. | 2532 images |
| Plantago elongata Pursh | 15 images |
| Plantago eriopoda Torr. | 12 images |
| Plantago indica L. | 234 images |
| Plantago lanceolata L. | 13714 images |
| Plantago major L. | 10005 images |
| Plantago maritima L. | 796 images |
| Plantago ovata Forssk. | 244 images |
| Plantago patagonica Jacq. | 50 images |
| Plantago pusilla Nutt. | 10 images |
| Plantago rhodosperma Decne. | 34 images |
| Plantago sempervirens Crantz | 385 images |
| Plantago subnuda Pilg. | 23 images |
| Plantago virginica L. | 179 images |
| Plantago wrightiana Decne. | 6 images |
| Platanthera aquilonis Sheviak | 21 images |
| Platanthera dilatata (Pursh) Lindl. ex L.C.Beck | 4 images |
| Platanthera elegans Lindl. | 17 images |
| Platanthera ephemerantha R.M.Bateman | 1 images |
| Platanthera obtusata (Banks ex Pursh) Lindl. | 12 images |
| Platanthera sparsiflora (S.Watson) Schltr. | 46 images |
| Platanthera stricta Lindl. | 22 images |
| Platanus racemosa Nutt. | 486 images |
| Platanus wrightii S.Watson | 2 images |
| Platystemon californicus Benth. | 205 images |
| Platystigma lineare Benth. | 2 images |
| Plectocephalus americanus (Nutt.) D.Don | 4 images |
| Pleiacanthus spinosus (Nutt.) Rydb. | 32 images |
| Pleradenophora bilocularis (S.Watson) Esser & A.L.Melo | 2 images |
| Pleuricospora fimbriolata A.Gray | 6 images |
| Pluchea odorata (L.) Cass. | 267 images |
| Pluchea sericea Coville | 56 images |
| Plumbago zeylanica L. | 346 images |
| Poa alpina L. | 316 images |
| Poa angustifolia L. | 3 images |
| Poa annua L. | 2976 images |
| Poa atropurpurea Scribn. | 8 images |
| Poa bolanderi Vasey | 10 images |
| Poa bulbosa L. | 1172 images |
| Poa compressa L. | 110 images |
| Poa confinis Vasey | 2 images |
| Poa cusickii Vasey | 7 images |
| Poa douglasii Nees | 6 images |
| Poa fendleriana (Steud.) Vasey | 12 images |
| Poa glauca Vahl | 40 images |
| Poa infirma Kunth | 51 images |
| Poa leptocoma Trin. | 9 images |
| Poa macrantha Vasey | 1 images |
| Poa napensis Beetle | 1 images |
| Poa nemoralis L. | 393 images |
| Poa occidentalis (Vasey) Vasey | 6 images |
| Poa palustris L. | 125 images |
| Poa pratensis L. | 2838 images |
| Poa rhizomata Hitchc. | 1 images |
| Poa secunda J.Presl | 9 images |
| Poa stenantha Trin. | 1 images |
| Poa trivialis L. | 1776 images |
| Podagrostis humilis (Vasey) Björkman | 1 images |
| Podistera nevadensis (A.Gray) S.Watson | 17 images |
| Pogogyne douglasii Benth. | 3 images |
| Pogogyne floribunda Jokerst | 7 images |
| Pogogyne zizyphoroides Benth. | 2 images |
| Polemonium californicum Eastw. | 34 images |
| Polemonium carneum A.Gray | 32 images |
| Polemonium chartaceum H.Mason | 8 images |
| Polemonium elegans Greene | 20 images |
| Polemonium eximium Greene | 31 images |
| Polemonium foliosissimum A.Gray | 30 images |
| Polemonium micranthum Benth. | 4 images |
| Polemonium occidentale Greene | 103 images |
| Polemonium pauciflorum S.Watson | 12 images |
| Polemonium pulcherrimum Hook. | 85 images |
| Polemonium viscosum Nutt. | 25 images |
| Poliomintha incana (Torr.) A.Gray | 2 images |
| Polycarpon depressum Nutt. | 5 images |
| Polycarpon tetraphyllum (L.) L. | 1187 images |
| Polyctenium fremontii (S.Watson) Greene | 4 images |
| Polygala alba Nutt. | 26 images |
| Polygala glochidiata Kunth | 5 images |
| Polygala myrtifolia L. | 5704 images |
| Polygala verticillata L. | 5 images |
| Polygonatum biflorum (Walter) Elliott | 695 images |
| Polygonum arenastrum Boreau | 174 images |
| Polygonum aviculare L. | 5023 images |
| Polygonum bidwelliae S.Watson | 2 images |
| Polygonum douglasii Greene | 5 images |
| Polygonum majus (Meisn.) Piper | 2 images |
| Polygonum minimum S.Watson | 15 images |
| Polygonum parryi Greene | 1 images |
| Polygonum polygaloides Meisn. | 1 images |
| Polygonum shastense W.H.Brewer ex A.Gray | 38 images |
| Polypodium californicum Kaulf. | 77 images |
| Polypodium cambricum L. | 1640 images |
| Polypodium hesperium Maxon | 10 images |
| Polypodium scouleri Hook. & Grev. | 26 images |
| Polypogon australis Brongn. | 8 images |
| Polypogon maritimus Willd. | 35 images |
| Polypogon monspeliensis (L.) Desf. | 800 images |
| Polypogon viridis (Gouan) Breistr. | 201 images |
| Polystemma cordifolium (A.Gray) McDonnell & Fishbein | 2 images |
| Polystichum californicum (D.C.Eaton) Diels | 7 images |
| Polystichum dudleyi Maxon | 5 images |
| Polystichum imbricans (D.C.Eaton) D.H.Wagner | 46 images |
| Polystichum lemmonii Underw. | 20 images |
| Polystichum lonchitis (L.) Roth | 610 images |
| Polystichum munitum (Kaulf.) C.Presl | 916 images |
| Polystichum scopulinum (D.C.Eaton) Maxon | 9 images |
| Pombalia verticillata (Ortega) Paula-Souza | 9 images |
| Pontederia crassipes Mart. | 1617 images |
| Pontederia vaginalis Burm.f. | 22 images |
| Populus angustifolia E.James | 5 images |
| Populus deltoides W.Bartram ex Marshall | 547 images |
| Populus fremontii S.Watson | 13 images |
| Populus tremuloides Michx. | 1350 images |
| Populus tristis Fisch. | 210 images |
| Porophyllum gracile Benth. | 21 images |
| Porophyllum ruderale (Jacq.) Cass. | 305 images |
| Portulaca grandiflora Hook. | 7749 images |
| Portulaca halimoides L. | 31 images |
| Portulaca oleracea L. | 12319 images |
| Portulaca pilosa L. | 692 images |
| Portulaca suffrutescens Engelm. | 18 images |
| Portulaca umbraticola Kunth | 1485 images |
| Potamogeton alpinus Balb. | 23 images |
| Potamogeton amplifolius Tuck. | 7 images |
| Potamogeton berchtoldii Fieber | 24 images |
| Potamogeton crispus L. | 157 images |
| Potamogeton diversifolius Raf. | 1 images |
| Potamogeton epihydrus Raf. | 4 images |
| Potamogeton foliosus Raf. | 5 images |
| Potamogeton friesii Rupr. | 8 images |
| Potamogeton gramineus L. | 39 images |
| Potamogeton natans L. | 543 images |
| Potamogeton nodosus Poir. | 307 images |
| Potamogeton praelongus Wulfen | 22 images |
| Potamogeton pusillus L. | 42 images |
| Potentilla anglica Laichard. | 670 images |
| Potentilla biennis Greene | 2 images |
| Potentilla concinna Richardson | 8 images |
| Potentilla daucifolia Greene | 10 images |
| Potentilla douglasii Greene | 15 images |
| Potentilla drummondii Lehm. | 17 images |
| Potentilla flabellifolia Hook. ex Torr. & A.Gray | 1 images |
| Potentilla gracilis Douglas ex Hook. | 181 images |
| Potentilla hippiana Lehm. | 10 images |
| Potentilla inclinata Vill. | 46 images |
| Potentilla indica (Andrews) Th.Wolf | 5182 images |
| Potentilla lindleyi Greene | 10 images |
| Potentilla marinensis (Elmer) J.T.Howell | 2 images |
| Potentilla millefolia Rydb. | 19 images |
| Potentilla morefieldii Ertter | 8 images |
| Potentilla nivea L. | 26 images |
| Potentilla norvegica L. | 673 images |
| Potentilla pensylvanica L. | 16 images |
| Potentilla plattensis Nutt. | 1 images |
| Potentilla pseudosericea Rydb. | 9 images |
| Potentilla purpurascens (S.Watson) Greene | 1 images |
| Potentilla recta L. | 3227 images |
| Potentilla reptans L. | 10241 images |
| Potentilla rydbergii (Elmer) Mosyakin & Shiyan | 2 images |
| Potentilla santolinoides (A.Gray) Greene | 16 images |
| Potentilla sericata (S.Watson) Greene | 1 images |
| Potentilla supina L. | 185 images |
| Potentilla thurberi A.Gray | 79 images |
| Potentilla tilingii (Regel) Greene | 19 images |
| Potentilla yadonii (Ertter) Mosyakin & Shiyan | 1 images |
| Primula clevelandii (Greene) A.R.Mast & Reveal | 41 images |
| Primula fragrans A.R.Mast & Reveal | 3 images |
| Primula hendersonii (A.Gray) A.R.Mast & Reveal | 20 images |
| Primula jeffreyi (Van Houtte) A.R.Mast & Reveal | 47 images |
| Primula parryi A.Gray | 35 images |
| Primula pauciflora (Durand) A.R.Mast & Reveal | 40 images |
| Primula rusbyi Greene | 4 images |
| Primula specuicola Rydb. | 3 images |
| Primula subalpina (Eastw.) A.R.Mast & Reveal | 1 images |
| Primula suffrutescens A.Gray | 62 images |
| Primula tetrandra (Suksd.) A.R.Mast & Reveal | 2 images |
| Proboscidea althaeifolia (Benth.) Decne. | 3 images |
| Proboscidea louisianica (Mill.) Thell. | 217 images |
| Prosartes hookeri Torr. | 124 images |
| Prosartes smithii (Hook.) Utech, Shinwari & Kawano | 61 images |
| Prosartes trachycarpa S.Watson | 38 images |
| Prosopis glandulosa Torr. | 456 images |
| Prosopis pubescens Benth. | 40 images |
| Prosopis velutina Wooton | 31 images |
| Prunella vulgaris L. | 18738 images |
| Prunus × yedoensis Matsum. | 1021 images |
| Prunus americana Marshall | 61 images |
| Prunus amygdalus Batsch | 921 images |
| Prunus armeniaca L. | 5600 images |
| Prunus avium (L.) L. | 20049 images |
| Prunus cerasifera Ehrh. | 21800 images |
| Prunus cerasus L. | 10296 images |
| Prunus domestica L. | 16961 images |
| Prunus fasciculata (Torr.) A.Gray | 2 images |
| Prunus fremontii S.Watson | 1 images |
| Prunus ilicifolia (Nutt. ex Hook. & Arn.) D.Dietr. | 67 images |
| Prunus laurocerasus L. | 20256 images |
| Prunus lusitanica L. | 4204 images |
| Prunus mahaleb L. | 6677 images |
| Prunus padus L. | 13694 images |
| Prunus persica (L.) Batsch | 10217 images |
| Prunus pumila L. | 22 images |
| Prunus rivularis Scheele | 25 images |
| Prunus serotina Ehrh. | 8277 images |
| Prunus speciosa (Koidz.) Nakai | 4 images |
| Prunus subcordata Benth. | 12 images |
| Prunus tomentosa Thunb. | 361 images |
| Prunus virginiana L. | 2718 images |
| Psathyrotes annua (Nutt.) A.Gray | 9 images |
| Psathyrotes ramosissima A.Gray | 30 images |
| Pseudobahia bahiifolia Rydb. | 8 images |
| Pseudobahia heermannii Rydb. | 10 images |
| Pseudobahia peirsonii Munz | 18 images |
| Pseudocydonia sinensis (Dum.Cours.) C.K.Schneid. | 72 images |
| Pseudognaphalium biolettii Anderb. ex Nesom | 43 images |
| Pseudognaphalium californicum (DC.) Anderb. | 194 images |
| Pseudognaphalium canescens (DC.) Anderb. | 1 images |
| Pseudognaphalium leucocephalum (A.Gray) Anderb. | 22 images |
| Pseudognaphalium luteoalbum (L.) Hilliard & B.L.Burtt | 1209 images |
| Pseudognaphalium microcephalum (Nutt.) Anderb. | 8 images |
| Pseudognaphalium ramosissimum (Nutt.) Anderb. | 18 images |
| Pseudognaphalium stramineum (Kunth) Anderb. | 101 images |
| Pseudopodospermum hispanicum (L.) Zaika, Sukhor. & N.Kilian | 628 images |
| Pseudosasa japonica (Siebold & Zucc. ex Steud.) Makino ex Nakai | 88 images |
| Pseudotsuga macrocarpa (Vasey) Mayr | 25 images |
| Pseudotsuga menziesii (Mirb.) Franco | 4346 images |
| Pseudoziziphus parryi (Torr.) Hauenschild | 14 images |
| Psilactis asteroides A.Gray | 2 images |
| Psilocarphus brevissimus Nutt. | 36 images |
| Psilocarphus elatior A.Gray | 1 images |
| Psilocarphus oregonus Nutt. | 3 images |
| Psilocarphus tenellus Nutt. | 30 images |
| Psilostrophe cooperi (A.Gray) Greene | 26 images |
| Psilostrophe sparsiflora (A.Gray) A.Nelson | 5 images |
| Psilostrophe tagetina (Nutt.) Greene | 12 images |
| Psilotum nudum (L.) P.Beauv. | 179 images |
| Psorothamnus fremontii (Torr. ex A.Gray) Barneby | 2 images |
| Psorothamnus schottii (Torr.) Barneby | 71 images |
| Ptelea crenulata Greene | 32 images |
| Ptelea trifoliata L. | 427 images |
| Pteris cretica L. | 884 images |
| Pteris multifida Poir. | 13 images |
| Pteris tremula R.Br. | 24 images |
| Pteris vittata L. | 505 images |
| Pterospora andromedea Nutt. | 257 images |
| Puccinellia distans (Jacq.) Parl. | 92 images |
| Puccinellia fasciculata (Torr.) E.P.Bicknell | 9 images |
| Puccinellia maritima (Huds.) Parl. | 57 images |
| Puccinellia parishii Hitchc. | 2 images |
| Pulicaria paludosa Link | 93 images |
| Pulsatilla occidentalis (S.Watson) Freyn | 3 images |
| Punica granatum L. | 13487 images |
| Purshia glandulosa Curran | 7 images |
| Purshia stansburiana (Torr.) Henrard | 12 images |
| Purshia tridentata (Pursh) DC. | 175 images |
| Pyracantha angustifolia (Franch.) C.K.Schneid. | 86 images |
| Pyracantha coccinea M.Roem. | 15409 images |
| Pyracantha crenulata (D.Don) M.Roem. | 1395 images |
| Pyracantha koidzumii (Hayata) Rehder | 683 images |
| Pyrola asarifolia Michx. | 106 images |
| Pyrola chlorantha Sw. | 309 images |
| Pyrola elliptica Nutt. | 141 images |
| Pyrola minor L. | 594 images |
| Pyrola picta Sm. | 124 images |
| Pyrrocoma carthamoides Hook. | 4 images |
| Pyrrocoma crocea (A.Gray) Greene | 25 images |
| Pyrrocoma lanceolata (Hook.) Greene | 1 images |
| Pyrrocoma uniflora (Hook.) Greene | 13 images |
| Pyrus calleryana Decne. | 4516 images |
| Pyrus communis L. | 10358 images |
| Quercus agrifolia Née | 212 images |
| Quercus arizonica Sarg. | 8 images |
| Quercus berberidifolia Liebm. | 57 images |
| Quercus chrysolepis Liebm. | 151 images |
| Quercus cornelius-mulleri Nixon & K.P.Steele | 4 images |
| Quercus douglasii Hook. & Arn. | 16 images |
| Quercus dumosa Nutt. | 26 images |
| Quercus durata Jeps. | 50 images |
| Quercus emoryi Torr. | 19 images |
| Quercus engelmannii Greene | 46 images |
| Quercus gambelii Nutt. | 155 images |
| Quercus garryana Douglas ex Hook. | 170 images |
| Quercus grisea Liebm. | 15 images |
| Quercus hypoleucoides A.Camus | 3 images |
| Quercus kelloggii Newb. | 52 images |
| Quercus lobata Née | 32 images |
| Quercus oblongifolia Torr. | 10 images |
| Quercus pacifica Nixon & C.H.Müll. | 9 images |
| Quercus palmeri (Engelm.) Engelm. | 39 images |
| Quercus parvula Greene | 5 images |
| Quercus pungens Liebm. | 3 images |
| Quercus rugosa Née | 29 images |
| Quercus tomentella Engelm. | 49 images |
| Quercus toumeyi Sarg. | 7 images |
| Quercus turbinella Greene | 79 images |
| Quercus vacciniifolia Hittell | 23 images |
| Quercus wislizeni A.DC. | 27 images |
| Quincula lobata (Torr.) Raf. | 52 images |
| Rafinesquia californica Nutt. | 31 images |
| Rafinesquia neomexicana A.Gray | 77 images |
| Raillardella argentea A.Gray | 20 images |
| Raillardella pringlei Greene | 10 images |
| Raillardella scaposa A.Gray | 12 images |
| Ranunculus acris L. | 11776 images |
| Ranunculus adoneus A.Gray | 7 images |
| Ranunculus alismifolius Geyer ex Benth. | 55 images |
| Ranunculus arizonicus Lemmon. ex A.Gray | 2 images |
| Ranunculus arvensis L. | 450 images |
| Ranunculus bonariensis Poir. | 2 images |
| Ranunculus bulbosus L. | 5038 images |
| Ranunculus californicus Benth. | 182 images |
| Ranunculus canus Benth. | 13 images |
| Ranunculus cupulatus (S.Watson) Christenh. & Byng | 5 images |
| Ranunculus digitatus Hook. | 4 images |
| Ranunculus eschscholtzii Schltdl. | 24 images |
| Ranunculus flabellaris Raf. | 11 images |
| Ranunculus flammula L. | 1778 images |
| Ranunculus glaberrimus Hook. | 68 images |
| Ranunculus gmelinii DC. | 4 images |
| Ranunculus gormanii Greene | 3 images |
| Ranunculus hyperboreus Rottb. | 14 images |
| Ranunculus inamoenus Greene | 3 images |
| Ranunculus macounii Britton | 11 images |
| Ranunculus minimus (L.) E.H.L.Krause | 168 images |
| Ranunculus muricatus L. | 1072 images |
| Ranunculus occidentalis Nutt. | 66 images |
| Ranunculus orthorhynchus Hook. | 44 images |
| Ranunculus parviflorus Loefl. | 6 images |
| Ranunculus pensylvanicus L.f. | 2 images |
| Ranunculus petiolaris Humb., Bonpl. & Kunth ex DC. | 3 images |
| Ranunculus populago Greene | 1 images |
| Ranunculus pusillus Poir. | 5 images |
| Ranunculus pygmaeus Wahlenb. | 16 images |
| Ranunculus repens L. | 15091 images |
| Ranunculus sardous Crantz | 879 images |
| Ranunculus sceleratus L. | 1412 images |
| Ranunculus sessilis (S.Watson) Christenh. & Byng | 3 images |
| Ranunculus trichophyllus Chaix | 480 images |
| Ranunculus uncinatus D.Don ex G.Don | 5 images |
| Raphanus raphanistrum L. | 13500 images |
| Rapistrum rugosum (L.) All. | 3012 images |
| Ratibida columnifera (Nutt.) Wooton & Standl. | 427 images |
| Ravenella exigua (Rattan) Morin | 9 images |
| Ravenella sharsmithiae (Morin) Morin | 3 images |
| Reseda alba L. | 1980 images |
| Reseda aucheri Boiss. | 12 images |
| Reseda lutea L. | 5935 images |
| Reseda luteola L. | 2988 images |
| Reseda odorata L. | 74 images |
| Reynoutria japonica Houtt. | 10643 images |
| Reynoutria sachalinensis (F.Schmidt) Nakai | 2308 images |
| Rhagadiolus stellatus (L.) Gaertn. | 180 images |
| Rhamnus alaternus L. | 9559 images |
| Rhamnus cathartica L. | 5232 images |
| Rhamnus crocea Nutt. | 149 images |
| Rhamphospermum arvense (L.) Andrz. ex Besser | 10213 images |
| Rhamphospermum nigrum (L.) Al-Shehbaz | 707 images |
| Rhaphiolepis bibas (Lour.) Galasso & Banfi | 11521 images |
| Rheum rhabarbarum L. | 590 images |
| Rhinanthus minor L. | 2697 images |
| Rhinotropis acanthoclada (A.Gray) J.R.Abbott | 14 images |
| Rhinotropis californica (Nutt.) J.R.Abbott | 56 images |
| Rhinotropis cornuta (Kellogg) J.R.Abbott | 31 images |
| Rhinotropis heterorhyncha (Barneby) J.R.Abbott | 2 images |
| Rhinotropis intermontana (T.Wendt) J.R.Abbott | 1 images |
| Rhinotropis lindheimeri (A.Gray) J.R.Abbott | 1 images |
| Rhodiola integrifolia Raf. | 76 images |
| Rhodiola rhodantha (A.Gray) H.Jacobsen | 9 images |
| Rhododendron columbianum (Piper) Harmaja | 74 images |
| Rhododendron macrophyllum D.Don ex G.Don | 166 images |
| Rhododendron menziesii Craven | 20 images |
| Rhododendron occidentale (Torr. & A.Gray) A.Gray | 114 images |
| Rhus glabra L. | 1732 images |
| Rhus integrifolia (Nutt.) Benth. & Hook.f. ex W.H.Brewer & S.Watson | 31 images |
| Rhus kearneyi F.A.Barkley | 1 images |
| Rhus microphylla Engelm. | 32 images |
| Rhus ovata S.Watson | 315 images |
| Rhus trilobata Nutt. | 14 images |
| Rhus typhina L. | 10201 images |
| Rhynchosida physocalyx (A.Gray) Fryxell | 19 images |
| Rhynchospora alba (L.) Vahl | 181 images |
| Rhynchospora capitellata (Michx.) Vahl | 3 images |
| Ribes amarum McClatchie | 4 images |
| Ribes aureum Pursh | 1678 images |
| Ribes californicum Hook. & Arn. | 8 images |
| Ribes cereum Douglas | 147 images |
| Ribes divaricatum Douglas | 27 images |
| Ribes hudsonianum Richardson | 5 images |
| Ribes indecorum Eastw. | 41 images |
| Ribes inerme Rydb. | 24 images |
| Ribes lacustre (Pers.) Poir. | 84 images |
| Ribes laxiflorum Pursh | 14 images |
| Ribes leptanthum A.Gray | 4 images |
| Ribes lobbii A.Gray | 1 images |
| Ribes malvaceum Sm. | 74 images |
| Ribes menziesii Pursh | 27 images |
| Ribes montigenum McClatchie | 30 images |
| Ribes nevadense Kellogg | 38 images |
| Ribes niveum Lindl. | 7 images |
| Ribes oxyacanthoides L. | 2 images |
| Ribes quercetorum Greene | 18 images |
| Ribes roezlii Regel | 59 images |
| Ribes sanguineum Pursh | 6277 images |
| Ribes sericeum Eastw. | 1 images |
| Ribes speciosum Pursh | 237 images |
| Ribes thacherianum (Jeps.) Munz | 5 images |
| Ribes velutinum Greene | 21 images |
| Ribes viburnifolium A.Gray | 14 images |
| Ribes victoris Greene | 2 images |
| Ribes viscosissimum Pursh | 24 images |
| Ribes wolfii Rothr. | 4 images |
| Ricinus communis L. | 10944 images |
| Rigiopappus leptocladus A.Gray | 8 images |
| Rivina humilis L. | 1033 images |
| Robinia hispida L. | 1381 images |
| Robinia neomexicana A.Gray | 30 images |
| Robinia pseudoacacia L. | 21893 images |
| Roemeria argemone (L.) C.Morales, R.Mend. & Romero García | 1366 images |
| Roemeria refracta DC. | 9 images |
| Roemeria sicula (Guss.) ined. | 932 images |
| Roldana hartwegii (Benth.) H.Rob. & Brettell | 3 images |
| Romanzoffia californica Greene | 21 images |
| Romanzoffia tracyi Jeps. | 1 images |
| Romneya coulteri Harv. | 702 images |
| Romneya trichocalyx Eastw. | 14 images |
| Romulea rosea (L.) Eckl. | 128 images |
| Rorippa austriaca (Crantz) Besser | 157 images |
| Rorippa curvipes Greene | 10 images |
| Rorippa curvisiliqua (Hook.) Bessey ex Britton | 4 images |
| Rorippa palustris (L.) Besser | 969 images |
| Rorippa subumbellata Rollins | 13 images |
| Rorippa sylvestris (L.) Besser | 2138 images |
| Rosa bridgesii Crép. ex Rydb. | 23 images |
| Rosa californica Cham. & Schltdl. | 26 images |
| Rosa canina L. | 21336 images |
| Rosa gymnocarpa Nutt. | 6 images |
| Rosa lucieae Franch. & Rochebr. ex Crép. | 2446 images |
| Rosa minutifolia Engelm. | 4 images |
| Rosa multiflora Thunb. | 5124 images |
| Rosa nutkana C.Presl | 15 images |
| Rosa pisocarpa A.Gray | 2 images |
| Rosa rubiginosa L. | 3844 images |
| Rosa rugosa Thunb. | 9163 images |
| Rosa stellata Wooton | 8 images |
| Rosa woodsii Lindl. | 840 images |
| Rostraria cristata (L.) Tzvelev | 598 images |
| Rotala ramosior (L.) Koehne | 9 images |
| Rubus allegheniensis Porter | 67 images |
| Rubus armeniacus Focke | 1052 images |
| Rubus deliciosus Torr. | 105 images |
| Rubus flagellaris Willd. | 36 images |
| Rubus idaeus L. | 7145 images |
| Rubus leucodermis (Douglas ex Hook.) Douglas ex Torr. & A.Gray | 2 images |
| Rubus nemoralis P.J.Müll. | 999 images |
| Rubus nivalis Douglas ex Hook. | 14 images |
| Rubus pensilvanicus Poir. | 42 images |
| Rubus spectabilis Pursh | 1167 images |
| Rubus ulmifolius Schott | 11440 images |
| Rubus ursinus Cham. & Schltdl. | 179 images |
| Rudbeckia glaucescens Eastw. | 8 images |
| Rudbeckia hirta L. | 4646 images |
| Rudbeckia laciniata L. | 2406 images |
| Rudbeckia occidentalis Nutt. | 72 images |
| Rudbeckia triloba L. | 1061 images |
| Ruellia ciliatiflora Hook. | 237 images |
| Rumex × acutus L. | 1523 images |
| Rumex acetosella L. | 5118 images |
| Rumex altissimus Alph.Wood | 12 images |
| Rumex conglomeratus Murray | 2435 images |
| Rumex crispus L. | 9794 images |
| Rumex dentatus L. | 18 images |
| Rumex ellipticus Greene | 22 images |
| Rumex hymenosepalus Torr. | 84 images |
| Rumex hypogaeus T.M.Schust. & Reveal | 3 images |
| Rumex obtusifolius L. | 12721 images |
| Rumex occidentalis S.Watson | 4 images |
| Rumex palustris Sm. | 190 images |
| Rumex patientia L. | 2940 images |
| Rumex paucifolius Nutt. | 11 images |
| Rumex pulcher L. | 2127 images |
| Rumex salicifolius Weinm. | 29 images |
| Rumex spinosus L. | 382 images |
| Rumex stenophyllus Ledeb. | 1 images |
| Rumex venosus Pursh | 12 images |
| Ruppia cirrhosa (Petagna) Grande | 33 images |
| Ruppia maritima L. | 23 images |
| Ruta chalepensis L. | 1331 images |
| Ruta graveolens L. | 3216 images |
| Sabulina douglasii (Fenzl ex Torr. & A.Gray) Dillenb. & Kadereit | 12 images |
| Sabulina stricta (Sw.) Rchb. | 3 images |
| Sagina apetala Ard. | 204 images |
| Sagina maxima A.Gray | 10 images |
| Sagina procumbens L. | 937 images |
| Sagina saginoides (L.) H.Karst. | 72 images |
| Sagittaria latifolia Willd. | 700 images |
| Sagittaria montevidensis Cham. & Schltdl. | 156 images |
| Sagittaria rigida Pursh | 8 images |
| Sagittaria sanfordii Greene | 1 images |
| Sairocarpus nuttallianus (Benth.) D.A.Sutton | 10 images |
| Sairocarpus subcordatus (A.Gray) D.A.Sutton | 1 images |
| Sairocarpus virga (A.Gray) D.A.Sutton | 4 images |
| Salicornia bigelovii Torr. | 24 images |
| Salicornia rubra A.Nelson | 14 images |
| Salicornia virginica L. | 10 images |
| Salix × fragilis L. | 113 images |
| Salix alba L. | 9971 images |
| Salix amygdaloides Andersson | 24 images |
| Salix babylonica L. | 6143 images |
| Salix bebbiana Sarg. | 29 images |
| Salix bonplandiana Kunth | 8 images |
| Salix boothii Dorn | 1 images |
| Salix brachycarpa Nutt. | 1 images |
| Salix breweri Bebb | 3 images |
| Salix cascadensis Cockerell | 1 images |
| Salix cinerea L. | 5649 images |
| Salix drummondiana Barratt ex Hook. | 2 images |
| Salix eastwoodiae Cockerell ex A.Heller | 1 images |
| Salix exigua Nutt. | 231 images |
| Salix geyeriana Andersson | 5 images |
| Salix glauca L. | 204 images |
| Salix gooddingii C.R.Ball | 5 images |
| Salix hookeriana Barratt ex Hook. | 15 images |
| Salix irrorata Andersson | 2 images |
| Salix laevigata Bebb | 37 images |
| Salix lasiandra Benth. | 3 images |
| Salix lasiolepis Benth. | 177 images |
| Salix lemmonii Bebb | 2 images |
| Salix lucida Muhl. | 63 images |
| Salix lutea Nutt. | 2 images |
| Salix melanopsis Nutt. | 8 images |
| Salix nivalis Hook. | 9 images |
| Salix petrophila Rydb. | 32 images |
| Salix planifolia Pursh | 7 images |
| Salix prolixa Andersson | 13 images |
| Salix purpurea L. | 3092 images |
| Salix scouleriana Barratt ex Hook. | 20 images |
| Salix sitchensis Sanson ex Bong. | 41 images |
| Salsola tragus L. | 50 images |
| Saltugilia caruifolia (Abrams) L.A.Johnson | 33 images |
| Salvia × bernardina Parish ex Greene | 1 images |
| Salvia aethiopis L. | 326 images |
| Salvia apiana Jeps. | 535 images |
| Salvia azurea Michx. ex Vahl | 80 images |
| Salvia carduacea Benth. | 59 images |
| Salvia clevelandii (A.Gray) Greene | 58 images |
| Salvia columbariae Benth. | 267 images |
| Salvia dorrii (Kellogg) Abrams | 74 images |
| Salvia eremostachya Jeps. | 1 images |
| Salvia greatae Brandegee | 1 images |
| Salvia leucophylla Greene | 314 images |
| Salvia mellifera Greene | 530 images |
| Salvia microphylla Kunth | 13078 images |
| Salvia mohavensis Greene | 1 images |
| Salvia munzii Epling | 4 images |
| Salvia officinalis L. | 11203 images |
| Salvia pachyphylla Epling ex Munz | 62 images |
| Salvia reflexa Hornem. | 29 images |
| Salvia sclarea L. | 3639 images |
| Salvia sonomensis Greene | 45 images |
| Salvia spathacea Greene | 203 images |
| Salvia subincisa Benth. | 9 images |
| Salvia vaseyi (Porter) Parish | 10 images |
| Salvia verbenaca L. | 5923 images |
| Salvinia molesta D.Mitch. | 28 images |
| Sambucus canadensis L. | 4235 images |
| Sambucus cerulea Raf. | 9 images |
| Sambucus mexicana C.Presl ex DC. | 2 images |
| Sambucus racemosa L. | 8487 images |
| Samolus ebracteatus Kunth | 14 images |
| Samolus parviflorus Raf. | 2 images |
| Sanguisorba minor Scop. | 8538 images |
| Sanguisorba officinalis L. | 3183 images |
| Sanicula arctopoides Hook. & Arn. | 121 images |
| Sanicula arguta Greene ex J.M.Coult. & Rose | 9 images |
| Sanicula bipinnata Hook. & Arn. | 26 images |
| Sanicula bipinnatifida Douglas | 209 images |
| Sanicula crassicaulis Poepp. ex DC. | 210 images |
| Sanicula graveolens Poepp. ex DC. | 18 images |
| Sanicula laciniata Hook. & Arn. | 30 images |
| Sanicula saxatilis Greene | 5 images |
| Sanicula tuberosa Torr. | 15 images |
| Santolina chamaecyparissus L. | 6345 images |
| Sanvitalia abertii A.Gray | 8 images |
| Sanvitalia procumbens Lam. | 1440 images |
| Saponaria ocymoides L. | 6074 images |
| Saponaria officinalis L. | 15387 images |
| Sarcobatus vermiculatus (Hook.) Torr. | 42 images |
| Sarcodes sanguinea Torr. | 299 images |
| Sarracenia purpurea L. | 1216 images |
| Saussurea americana Eaton | 6 images |
| Saxifraga adscendens L. | 43 images |
| Saxifraga bronchialis L. | 52 images |
| Saxifraga cernua L. | 28 images |
| Saxifraga cespitosa L. | 84 images |
| Saxifraga chrysantha A.Gray | 3 images |
| Saxifraga hirculus L. | 114 images |
| Scabiosa atropurpurea L. | 4956 images |
| Scabrethia scabra (Hook.) W.A.Weber | 13 images |
| Scandix pecten-veneris L. | 2711 images |
| Scheuchzeria palustris L. | 104 images |
| Schinus molle L. | 6146 images |
| Schinus polygama (Cav.) Cabrera | 57 images |
| Schinus terebinthifolia Raddi | 2343 images |
| Schismus arabicus Nees | 14 images |
| Schismus barbatus (L.) Thell. | 18 images |
| Schizachyrium scoparium (Michx.) Nash | 50 images |
| Schkuhria pinnata (Lam.) Kuntze ex Thell. | 53 images |
| Schoenoplectiella mucronata (L.) J.Jung & H.K.Choi | 36 images |
| Schoenoplectus californicus (C.A.Mey.) Soják | 32 images |
| Schoenoplectus pungens (Vahl) Palla | 60 images |
| Schoenoplectus tabernaemontani (C.C.Gmel.) Palla | 82 images |
| Schoenus nigricans L. | 382 images |
| Scilla luciliae (Boiss.) Speta | 3866 images |
| Scilla siberica Andrews | 2361 images |
| Scirpus atrovirens Willd. | 177 images |
| Scirpus microcarpus J.Presl & C.Presl | 4 images |
| Scirpus pendulus Muhl. | 30 images |
| Scleranthus annuus L. | 279 images |
| Sclerocactus blainei S.L.Welsh & K.H.Thorne | 6 images |
| Sclerocactus brevispinus K.D.Heil & J.M.Porter | 1 images |
| Sclerocactus johnsonii (Parry ex Engelm.) N.P.Taylor | 15 images |
| Sclerocactus nyensis Hochstätter | 6 images |
| Sclerocactus papyracanthus (Engelm.) N.P.Taylor | 7 images |
| Sclerocactus parviflorus Clover & Jotter | 20 images |
| Sclerocactus polyancistrus (Engelm. & J.M.Bigelow) Britton & Rose | 5 images |
| Sclerocactus pubispinus (Engelm.) L.D.Benson | 3 images |
| Sclerocactus spinosior (Engelm.) D.Woodruff & L.D.Benson | 9 images |
| Sclerocactus wetlandicus Hochstätter | 5 images |
| Sclerocactus whipplei (Engelm. & J.M.Bigelow) Britton & Rose | 3 images |
| Sclerocactus wrightiae L.D.Benson | 6 images |
| Sclerochloa dura (L.) P.Beauv. | 57 images |
| Scoliopus bigelovii Torr. | 121 images |
| Scolymus hispanicus L. | 3481 images |
| Scrophularia atrata Pennell | 1 images |
| Scrophularia californica Cham. & Schltdl. | 44 images |
| Scrophularia lanceolata Pursh | 13 images |
| Scrophularia peregrina L. | 893 images |
| Scutellaria angustifolia Pursh | 2 images |
| Scutellaria antirrhinoides Benth. | 12 images |
| Scutellaria galericulata L. | 1214 images |
| Scutellaria lateriflora L. | 84 images |
| Scutellaria mexicana (Torr.) A.J.Paton | 11 images |
| Scutellaria sapphirina (Barneby) Olmstead | 5 images |
| Scutellaria siphocampyloides Vatke | 33 images |
| Scutellaria tuberosa Benth. | 74 images |
| Searsia lancea (L.f.) F.A.Barkley | 158 images |
| Secale cereale L. | 3345 images |
| Sedum albomarginatum R.T.Clausen | 35 images |
| Sedum album L. | 9593 images |
| Sedum cockerellii Britton | 2 images |
| Sedum divergens S.Watson | 19 images |
| Sedum hispanicum L. | 1231 images |
| Sedum lanceolatum Torr. | 83 images |
| Sedum laxum (Britton) A.Berger | 40 images |
| Sedum niveum Davidson | 35 images |
| Sedum oblanceolatum R.T.Clausen | 2 images |
| Sedum obtusatum A.Gray | 87 images |
| Sedum oreganum Nutt. | 107 images |
| Sedum oregonense (S.Watson) M.E.Peck | 29 images |
| Sedum pentandrum (Sharsm.) ined. | 1 images |
| Sedum praealtum A.DC. | 295 images |
| Sedum pumilum Benth. | 4 images |
| Sedum spathulifolium Hook. | 1358 images |
| Sedum stelliforme S.Watson | 10 images |
| Sedum stenopetalum Pursh | 19 images |
| Selaginella kraussiana (Kunze) A.Braun | 198 images |
| Selaginella selaginoides (L.) P.Beauv. ex Schrank & Mart. | 140 images |
| Sempervivum tectorum L. | 11120 images |
| Senecio arizonicus Greene | 2 images |
| Senecio aronicoides DC. | 17 images |
| Senecio atratus Greene | 31 images |
| Senecio bigelovii A.Gray | 10 images |
| Senecio blochmaniae Greene | 7 images |
| Senecio californicus DC. | 27 images |
| Senecio clarkianus A.Gray | 7 images |
| Senecio elegans L. | 282 images |
| Senecio eremophilus Richardson | 2 images |
| Senecio flaccidus Less. | 138 images |
| Senecio hydrophilus Nutt. | 6 images |
| Senecio integerrimus Nutt. | 129 images |
| Senecio lemmonii A.Gray | 2 images |
| Senecio minimus Poir. | 166 images |
| Senecio mohavensis A.Gray | 19 images |
| Senecio pattersonensis Hoover | 1 images |
| Senecio riddellii Torr. & A.Gray | 4 images |
| Senecio scorzonella Greene | 19 images |
| Senecio serra Hook. | 11 images |
| Senecio spartioides Torr. & A.Gray | 19 images |
| Senecio squalidus L. | 3165 images |
| Senecio sylvaticus L. | 1751 images |
| Senecio triangularis Hook. | 275 images |
| Senecio vulgaris L. | 9272 images |
| Senecio wootonii Greene | 10 images |
| Senegalia berlandieri (Benth.) Britton & Rose | 32 images |
| Senna alata (L.) Roxb. | 877 images |
| Senna armata (S.Watson) H.S.Irwin & Barneby | 2 images |
| Senna artemisioides (Gaudich. ex DC.) Randell | 42 images |
| Senna hirsuta (L.) H.S.Irwin & Barneby | 57 images |
| Senna multiglandulosa (Jacq.) H.S.Irwin & Barneby | 84 images |
| Senna pendula (Humb. & Bonpl. ex Willd.) H.S.Irwin & Barneby | 274 images |
| Sequoia sempervirens (D.Don) Endl. | 3126 images |
| Sequoiadendron giganteum (Lindl.) J.Buchholz | 4645 images |
| Sericocarpus oregonensis Nutt. | 11 images |
| Sesamum indicum L. | 359 images |
| Sesbania herbacea (Mill.) McVaugh | 107 images |
| Sesuvium revolutifolium Ortega | 36 images |
| Setaria adhaerens (Forssk.) Chiov. | 12 images |
| Setaria faberi R.A.W.Herrm. | 28 images |
| Setaria italica (L.) P.Beauv. | 1302 images |
| Setaria leucopila (Scribn. & Merr.) K.Schum. | 3 images |
| Setaria liebmannii E.Fourn. | 16 images |
| Setaria macrostachya Kunth | 5 images |
| Setaria parviflora (Poir.) Kerguélen | 155 images |
| Setaria pumila (Poir.) Roem. & Schult. | 2513 images |
| Setaria scheelei (Steud.) Hitchc. | 7 images |
| Setaria sphacelata (Schumach.) Stapf & C.E.Hubb. ex Moss | 4 images |
| Setaria verticillata (L.) P.Beauv. | 1206 images |
| Setaria viridis (L.) P.Beauv. | 149 images |
| Setaria vulpiseta (Lam.) Roem. & Schult. | 12 images |
| Seymeria bipinnatisecta Seem. | 4 images |
| Shepherdia argentea (Pursh) Nutt. | 51 images |
| Shepherdia canadensis (L.) Nutt. | 149 images |
| Shepherdia rotundifolia Parry | 18 images |
| Sherardia arvensis L. | 3981 images |
| Sibbaldia procumbens L. | 173 images |
| Sida spinosa L. | 151 images |
| Sidalcea candida A.Gray | 20 images |
| Sidalcea covillei Greene | 12 images |
| Sidalcea glaucescens Greene | 55 images |
| Sidalcea hartwegii A.Gray ex Benth. | 2 images |
| Sidalcea hickmanii Greene | 6 images |
| Sidalcea malviflora (DC.) A.Gray | 159 images |
| Sidalcea multifida Greene | 3 images |
| Sidalcea neomexicana A.Gray | 25 images |
| Sidalcea oregana (Nutt.) A.Gray | 3 images |
| Sidalcea pedata A.Gray | 5 images |
| Sidalcea reptans Greene | 11 images |
| Sideroxylon lanuginosum Michx. | 93 images |
| Silene acaulis (L.) Jacq. | 2679 images |
| Silene antirrhina L. | 14 images |
| Silene bridgesii Rohrb. | 7 images |
| Silene conoidea L. | 13 images |
| Silene coronaria (L.) Clairv. | 6175 images |
| Silene dichotoma Ehrh. | 907 images |
| Silene douglasii Hook. | 49 images |
| Silene gallica L. | 1711 images |
| Silene grayi S.Watson | 8 images |
| Silene hookeri Nutt. | 12 images |
| Silene laciniata Cav. | 247 images |
| Silene latifolia Poir. | 19242 images |
| Silene lemmonii S.Watson | 25 images |
| Silene noctiflora L. | 1363 images |
| Silene occidentalis S.Watson | 7 images |
| Silene oregana S.Watson | 4 images |
| Silene parishii S.Watson | 2 images |
| Silene pendula L. | 1319 images |
| Silene pseudoatocion Desf. | 24 images |
| Silene sargentii S.Watson | 8 images |
| Silene scouleri Hook. | 2 images |
| Silene suksdorfii B.L.Rob. | 1 images |
| Silene uralensis (Rupr.) Bocquet | 14 images |
| Silene verecunda S.Watson | 4 images |
| Silene vulgaris (Moench) Garcke | 14408 images |
| Silybum marianum (L.) Gaertn. | 9053 images |
| Simmondsia chinensis (Link) C.K.Schneid. | 16 images |
| Simpsonanthus jonesii (A.Gray) Guilliams, Hasenstab & B.G.Baldwin | 1 images |
| Sinapis alba L. | 6144 images |
| Sisymbrium altissimum L. | 304 images |
| Sisymbrium erysimoides Desf. | 97 images |
| Sisymbrium irio L. | 2423 images |
| Sisymbrium loeselii L. | 1266 images |
| Sisymbrium officinale (L.) Scop. | 5661 images |
| Sisymbrium orientale L. | 319 images |
| Sisyrinchium bellum S.Watson | 17 images |
| Sisyrinchium californicum (Ker Gawl.) Dryand. | 78 images |
| Sisyrinchium elmeri Greene | 14 images |
| Sisyrinchium halophilum Greene | 25 images |
| Sisyrinchium idahoense E.P.Bicknell | 7 images |
| Sium suave Walter | 65 images |
| Smithiastrum prenanthoides (Durand) Morin | 12 images |
| Smithiastrum wilkinsianum (Greene) Morin | 9 images |
| Soda inermis Fourr. | 481 images |
| Solanum alatum Moench | 3 images |
| Solanum americanum Mill. | 5571 images |
| Solanum aviculare G.Forst. | 381 images |
| Solanum carolinense L. | 1469 images |
| Solanum chenopodioides Lam. | 1879 images |
| Solanum crispum Ruiz & Pav. | 280 images |
| Solanum dimidiatum Raf. | 171 images |
| Solanum douglasii Dunal | 148 images |
| Solanum dulcamara L. | 13421 images |
| Solanum elaeagnifolium Cav. | 1532 images |
| Solanum furcatum Dunal | 7 images |
| Solanum hindsianum Benth. | 45 images |
| Solanum lanceolatum Cav. | 16 images |
| Solanum lycopersicum L. | 15654 images |
| Solanum marginatum L.f. | 8 images |
| Solanum mauritianum Scop. | 1599 images |
| Solanum nigrum L. | 12751 images |
| Solanum peruvianum L. | 1 images |
| Solanum rostratum Dunal | 535 images |
| Solanum sisymbriifolium Lam. | 971 images |
| Solanum stoloniferum Schltdl. | 4 images |
| Solanum triflorum Nutt. | 57 images |
| Solanum umbelliferum Eschsch. | 276 images |
| Solanum villosum Mill. | 1913 images |
| Soleirolia soleirolii (Req.) Dandy | 1885 images |
| Solidago altissima L. | 466 images |
| Solidago canadensis L. | 13501 images |
| Solidago gigantea Aiton | 5970 images |
| Solidago missouriensis Nutt. | 23 images |
| Solidago multiradiata Aiton | 32 images |
| Solidago simplex Kunth | 16 images |
| Solidago velutina DC. | 89 images |
| Soliva sessilis Ruiz & Pav. | 149 images |
| Sonchus arvensis L. | 4865 images |
| Sonchus asper (L.) Hill | 13077 images |
| Sonchus tenerrimus L. | 4753 images |
| Sophora stenophylla A.Gray | 1 images |
| Sorbus aucuparia L. | 18423 images |
| Sorbus californica Greene | 24 images |
| Sorbus scopulina Greene | 51 images |
| Sorbus sitchensis M.Roem. | 1 images |
| Sorghastrum nutans (L.) Nash | 170 images |
| Sorghum × drummondii (Nees ex Steud.) Millsp. & Chase | 3 images |
| Sorghum arundinaceum (Desv.) Stapf | 23 images |
| Sorghum bicolor (L.) Moench | 2106 images |
| Sorghum halepense (L.) Pers. | 2781 images |
| Sparaxis tricolor (Schneev.) Ker Gawl. | 584 images |
| Sparganium angustifolium Michx. | 262 images |
| Sparganium emersum Rehmann | 186 images |
| Sparganium eurycarpum Engelm. | 46 images |
| Sparganium natans L. | 50 images |
| Spartium junceum L. | 5999 images |
| Spergula arvensis L. | 1152 images |
| Spergularia bocconei (Scheele) Graebn. | 59 images |
| Spergularia marina (L.) Besser | 591 images |
| Spergularia media (L.) C.Presl | 313 images |
| Spergularia rubra (L.) J.Presl & C.Presl | 1391 images |
| Sphaeralcea ambigua A.Gray | 444 images |
| Sphaeralcea angustifolia (Cav.) G.Don | 21 images |
| Sphaeralcea coccinea (Nutt.) Rydb. | 159 images |
| Sphaeralcea coulteri (S.Watson) A.Gray | 11 images |
| Sphaeralcea emoryi Torr. ex A.Gray | 13 images |
| Sphaeralcea fendleri A.Gray | 5 images |
| Sphaeralcea hastulata A.Gray | 25 images |
| Sphaeralcea incana Torr. ex A.Gray | 19 images |
| Sphaeralcea parvifolia A.Nelson | 19 images |
| Sphaeralcea rusbyi A.Gray | 12 images |
| Sphaerophysa salsula (Pall.) DC. | 16 images |
| Sphenopholis intermedia (Rydb.) Rydb. | 9 images |
| Sphenopholis obtusata (Michx.) Scribn. | 9 images |
| Spinacia oleracea L. | 1546 images |
| Spiraea douglasii Hook. | 3363 images |
| Spiraea japonica L.f. | 10968 images |
| Spiraea prunifolia Siebold & Zucc. | 251 images |
| Spiraea splendens Baumann ex K.Koch | 8 images |
| Spiranthes delitescens Sheviak | 1 images |
| Spiranthes diluvialis Sheviak | 5 images |
| Spiranthes porrifolia Lindl. | 13 images |
| Spiranthes romanzoffiana Cham. | 90 images |
| Spirodela polyrhiza (L.) Schleid. | 181 images |
| Sporobolus airoides (Torr.) Torr. | 24 images |
| Sporobolus alopecuroides (Piller & Mitterp.) P.M.Peterson | 55 images |
| Sporobolus alterniflorus (Loisel.) P.M.Peterson & Saarela | 60 images |
| Sporobolus anglicus (C.E.Hubb.) P.M.Peterson & Saarela | 73 images |
| Sporobolus cryptandrus (Torr.) A.Gray | 9 images |
| Sporobolus foliosus (Trin.) P.M.Peterson & Saarela | 2 images |
| Sporobolus hookerianus P.M.Peterson & Saarela | 4 images |
| Sporobolus indicus (L.) R.Br. | 395 images |
| Sporobolus michauxianus (Hitchc.) P.M.Peterson & Saarela | 62 images |
| Sporobolus neglectus Nash | 2 images |
| Sporobolus niliacus (Fig. & De Not.) P.M.Peterson | 4 images |
| Sporobolus pumilus (Roth) P.M.Peterson & Saarela | 47 images |
| Sporobolus pyramidatus (Lam.) Hitchc. | 4 images |
| Sporobolus schoenoides (L.) P.M.Peterson | 88 images |
| Sporobolus vaginiflorus (Torr. ex A.Gray) Alph.Wood | 8 images |
| Stachys ajugoides Benth. | 39 images |
| Stachys arvensis (L.) L. | 596 images |
| Stachys bullata Benth. | 138 images |
| Stachys byzantina K.Koch | 7302 images |
| Stachys chamissonis Benth. | 73 images |
| Stachys coccinea Ortega | 41 images |
| Stachys mexicana Benth. | 10 images |
| Stachys palustris L. | 4870 images |
| Stachys pilosa Nutt. | 16 images |
| Stachys pycnantha Benth. | 2 images |
| Stachys rigida Nutt. ex Benth. | 34 images |
| Stanleya pinnata (Pursh) Britton | 93 images |
| Stanleya viridiflora Nutt. | 3 images |
| Staphylea bolanderi A.Gray | 9 images |
| Stellaria apetala Ucria | 193 images |
| Stellaria borealis Bigelow | 3 images |
| Stellaria crassifolia Ehrh. | 20 images |
| Stellaria graminea L. | 3903 images |
| Stellaria littoralis Torr. | 7 images |
| Stellaria longifolia Muhl. ex Willd. | 9 images |
| Stellaria longipes Goldie | 20 images |
| Stellaria media (L.) Vill. | 12183 images |
| Stellaria nitens Nutt. | 5 images |
| Stellaria obtusa Engelm. | 2 images |
| Stemodia durantifolia (L.) Sw. | 57 images |
| Stenocereus thurberi (Engelm.) Buxb. | 249 images |
| Stenotaphrum secundatum (Walter) Kuntze | 476 images |
| Stenotus acaulis (Nutt.) Nutt. | 46 images |
| Stenotus armerioides Nutt. | 12 images |
| Stephanomeria diegensis Gottlieb | 25 images |
| Stephanomeria exigua Nutt. | 12 images |
| Stephanomeria virgata Benth. | 42 images |
| Stevia micrantha Lag. | 8 images |
| Stevia serrata Cav. | 23 images |
| Stevia viscida Kunth | 24 images |
| Stillingia spinulosa Torr. | 12 images |
| Streptanthus barbatus S.Watson | 10 images |
| Streptanthus barbiger Greene | 1 images |
| Streptanthus bernardinus (Greene) Parish | 2 images |
| Streptanthus breweri A.Gray | 1 images |
| Streptanthus cordatus Nutt. | 7 images |
| Streptanthus diversifolius S.Watson | 3 images |
| Streptanthus flavescens Hook. | 10 images |
| Streptanthus glandulosus Hook. | 80 images |
| Streptanthus heterophyllus Nutt. | 28 images |
| Streptanthus hispidus A.Gray | 36 images |
| Streptanthus insignis Jeps. | 5 images |
| Streptanthus morrisonii F.W.Hoffm. | 3 images |
| Streptanthus oliganthus Rollins | 1 images |
| Streptanthus polygaloides A.Gray | 16 images |
| Streptanthus simulans (Payson) Jeps. | 21 images |
| Streptanthus tortuosus Kellogg | 92 images |
| Streptopus amplexifolius (L.) DC. | 541 images |
| Strigosella africana (L.) Botsch. | 158 images |
| Stuckenia filiformis (Pers.) Börner | 4 images |
| Stuckenia pectinata (L.) Börner | 103 images |
| Stuckenia striata (Ruiz & Pav.) Holub | 2 images |
| Stylocline citroleum Morefield | 3 images |
| Suaeda californica S.Watson | 2 images |
| Suaeda spicata (Willd.) Moq. | 12 images |
| Suaeda taxifolia (Standl.) Standl. | 6 images |
| Subularia aquatica L. | 26 images |
| Swertia perennis L. | 587 images |
| Symphoricarpos albus (L.) S.F.Blake | 9651 images |
| Symphoricarpos longiflorus A.Gray | 22 images |
| Symphoricarpos mollis Nutt. | 148 images |
| Symphoricarpos occidentalis (R.Br.) Hook. | 57 images |
| Symphoricarpos orbiculatus Moench | 3037 images |
| Symphoricarpos oreophilus A.Gray | 9 images |
| Symphoricarpos rotundifolius A.Gray | 42 images |
| Symphyotrichum chilense (Nees) G.L.Nesom | 3 images |
| Symphyotrichum ericoides (L.) G.L.Nesom | 1498 images |
| Symphyotrichum foliaceum (Lindl. ex DC.) G.L.Nesom | 1 images |
| Symphyotrichum laeve (L.) Á.Löve & D.Löve | 166 images |
| Symphyotrichum lanceolatum (Willd.) G.L.Nesom | 2867 images |
| Symphyotrichum novae-angliae (L.) G.L.Nesom | 2515 images |
| Symphyotrichum subspicatum (Nees) G.L.Nesom | 22 images |
| Symphyotrichum subulatum (Michx.) G.L.Nesom | 719 images |
| Symphytum asperum Lepech. | 2222 images |
| Symphytum officinale L. | 18808 images |
| Syntrichopappus fremontii A.Gray | 9 images |
| Syntrichopappus lemmonii (A.Gray) A.Gray | 22 images |
| Syringa vulgaris L. | 19960 images |
| Syzygium australe (J.C.Wendl. ex Link) B.Hyland | 47 images |
| Syzygium paniculatum Gaertn. | 813 images |
| Taeniatherum caput-medusae (L.) Nevski | 83 images |
| Tagetes erecta L. | 13256 images |
| Tagetes lemmonii A.Gray | 272 images |
| Tagetes micrantha Cav. | 7 images |
| Tagetes minuta L. | 917 images |
| Talinum paniculatum (Jacq.) Gaertn. | 1739 images |
| Tamarix aphylla (L.) H.Karst. | 166 images |
| Tamarix chinensis Lour. | 159 images |
| Tamarix gallica L. | 5849 images |
| Tamarix parviflora DC. | 3074 images |
| Tamarix ramosissima Ledeb. | 1509 images |
| Tanacetum balsamita L. | 513 images |
| Tanacetum bipinnatum Sch.Bip. | 28 images |
| Tanacetum parthenium (L.) Sch.Bip. | 7849 images |
| Tanacetum vulgare L. | 16730 images |
| Tara spinosa (Molina) Britton & Rose | 175 images |
| Taraxacum erythrospermum Andrz. ex Besser | 1082 images |
| Taraxacum sect. Taraxacum F.H.Wigg. | 14239 images |
| Taraxia ovata (Nutt.) Small | 25 images |
| Taraxia subacaulis (Pursh) Rydb. | 2 images |
| Tauschia arguta (Torr. & A.Gray) J.F.Macbr. | 20 images |
| Tauschia howellii (J.M.Coult. & Rose) J.F.Macbr. | 3 images |
| Tauschia kelloggii (A.Gray) J.F.Macbr. | 13 images |
| Tauschia parishii (J.M.Coult. & Rose) J.F.Macbr. | 32 images |
| Taxus brevifolia Nutt. | 1018 images |
| Tecoma stans (L.) Juss. ex Kunth | 5328 images |
| Teesdalia coronopifolia (J.P.Bergeret) Thell. | 119 images |
| Teesdalia nudicaulis (L.) W.T.Aiton | 24 images |
| Tellima grandiflora (Pursh) Douglas ex Lindl. | 1277 images |
| Tephrosia vicioides Schltdl. | 23 images |
| Tetracoccus dioicus Parry | 24 images |
| Tetradymia axillaris A.Nelson | 2 images |
| Tetradymia canescens DC. | 85 images |
| Tetragonia tetragonoides (Pall.) Kuntze | 559 images |
| Tetramerium nervosum Nees | 36 images |
| Tetraneuris acaulis Greene | 25 images |
| Tetraneuris argentea Greene | 1 images |
| Tetraneuris ivesiana Greene | 3 images |
| Tetrapogon chlorideus (J.Presl) P.M.Peterson | 1 images |
| Teucrium canadense L. | 559 images |
| Teucrium laciniatum Torr. | 24 images |
| Thalictrum alpinum L. | 62 images |
| Thalictrum dasycarpum Fisch., C.A.Mey. & Avé-Lall. | 9 images |
| Thalictrum fendleri Engelm. ex A.Gray | 54 images |
| Thalictrum occidentale A.Gray | 35 images |
| Thalictrum revolutum DC. | 20 images |
| Thelesperma megapotamicum (Spreng.) Herter | 43 images |
| Thelypodium brachycarpum (Torr.) Torr. | 1 images |
| Thelypodium flexuosum B.L.Rob. | 2 images |
| Thelypodium howellii S.Watson | 1 images |
| Thelypodium integrifolium (Nutt.) Endl. | 2 images |
| Thelypodium laciniatum (Hook.) Endl. | 2 images |
| Thelypodium milleflorum A.Nelson | 5 images |
| Thelypodium stenopetalum S.Watson | 2 images |
| Themeda quadrivalvis (L.) Kuntze | 4 images |
| Thermopsis gracilis Howell | 13 images |
| Thermopsis montana Nutt. | 9 images |
| Thinopyrum elongatum (Host) D.R.Dewey | 21 images |
| Thinopyrum intermedium (Host) Barkworth & D.R.Dewey | 19 images |
| Thinopyrum junceum (L.) Á.Löve | 192 images |
| Thlaspi arvense L. | 2622 images |
| Thuja plicata Donn ex D.Don | 2570 images |
| Thymophylla acerosa (DC.) Strother | 13 images |
| Thymophylla concinna (A.Gray) Strother | 1 images |
| Thymophylla pentachaeta (DC.) Small | 91 images |
| Thysanocarpus curvipes Hook. | 70 images |
| Thysanocarpus laciniatus Nutt. | 27 images |
| Thysanocarpus radians Benth. | 16 images |
| Thysanolaena latifolia (Roxb. ex Hornem.) Honda | 91 images |
| Tiarella trifoliata L. | 152 images |
| Tidestromia lanuginosa (Nutt.) Standl. | 25 images |
| Tidestromia suffruticosa (Torr.) Standl. | 8 images |
| Tillandsia recurvata (L.) L. | 478 images |
| Tiquilia latior (I.M.Johnst.) A.T.Richardson | 2 images |
| Tiquilia palmeri (A.Gray) A.T.Richardson | 36 images |
| Tiquilia plicata (Torr.) A.T.Richardson | 34 images |
| Tithonia thurberi A.Gray | 2 images |
| Tolpis barbata (L.) Gaertn. | 922 images |
| Tomostima cuneifolia (Nutt.) Al-Shehbaz, M.Koch & Jordon-Thaden | 1 images |
| Tordylium apulum L. | 1554 images |
| Torilis africana Spreng. | 58 images |
| Torilis arvensis (Huds.) Link | 4525 images |
| Torilis japonica (Houtt.) DC. | 1408 images |
| Torilis nodosa (L.) Gaertn. | 851 images |
| Torreya californica Torr. | 199 images |
| Torreyochloa pallida (Torr.) Church | 10 images |
| Townsendia exscapa (Richardson) Porter | 11 images |
| Townsendia formosa Greene | 1 images |
| Townsendia hookeri Beaman | 10 images |
| Townsendia incana Nutt. | 6 images |
| Townsendia jonesii (Beaman) Reveal | 1 images |
| Townsendia mensana M.E.Jones | 1 images |
| Townsendia parryi Eaton | 3 images |
| Toxicodendron diversilobum (Torr. & A.Gray) Greene | 1322 images |
| Toxicodendron radicans (L.) Kuntze | 4735 images |
| Toxicodendron rydbergii (Small ex Rydb.) Greene | 119 images |
| Toxicoscordion brevibracteatum (M.E.Jones) R.R.Gates | 1 images |
| Toxicoscordion fremontii (Torr.) Rydb. | 51 images |
| Toxicoscordion paniculatum (Nutt.) Rydb. | 19 images |
| Toxicoscordion venenosum (S.Watson) Rydb. | 38 images |
| Trachypogon spicatus (L.f.) Kuntze | 10 images |
| Tradescantia fluminensis Vell. | 6475 images |
| Tradescantia occidentalis (Britton) Smyth | 95 images |
| Tradescantia pinetorum Greene | 5 images |
| Tradescantia virginiana L. | 4754 images |
| Tragia ramosa Torr. | 38 images |
| Tragopogon dubius Scop. | 5599 images |
| Tragopogon porrifolius L. | 4751 images |
| Tragopogon pratensis L. | 7942 images |
| Tragus berteronianus Schult. | 74 images |
| Tragus racemosus (L.) All. | 161 images |
| Trautvetteria caroliniensis (Walter) Vail | 34 images |
| Triadica sebifera (L.) Small | 617 images |
| Trianthema portulacastrum L. | 271 images |
| Tribulus terrestris L. | 2111 images |
| Tricardia watsonii Torr. ex S.Watson | 6 images |
| Trichophorum cespitosum (L.) Hartm. | 350 images |
| Trichophorum pumilum (Vahl) Schinz & Thell. | 19 images |
| Trichostema brachiatum L. | 24 images |
| Trichostema lanatum Benth. | 123 images |
| Trichostema lanceolatum Benth. | 120 images |
| Trichostema oblongum Benth. | 14 images |
| Trichostema parishii Vasey | 31 images |
| Trichostema simulatum Jeps. | 4 images |
| Tridens albescens (Vasey) Wooton & Standl. | 5 images |
| Tridens flavus (L.) Hitchc. | 62 images |
| Tridentopsis mutica (Torr.) P.M.Peterson | 3 images |
| Trifolium amabile Kunth | 10 images |
| Trifolium angustifolium L. | 1490 images |
| Trifolium arvense L. | 3259 images |
| Trifolium aureum Pollich | 790 images |
| Trifolium barbigerum Torr. | 19 images |
| Trifolium campestre Schreb. | 3745 images |
| Trifolium cernuum Brot. | 11 images |
| Trifolium ciliolatum Benth. | 26 images |
| Trifolium depauperatum Desv. | 44 images |
| Trifolium fragiferum L. | 1115 images |
| Trifolium fucatum Lindl. | 64 images |
| Trifolium glomeratum L. | 150 images |
| Trifolium hirtum All. | 309 images |
| Trifolium hybridum L. | 1431 images |
| Trifolium incarnatum L. | 6760 images |
| Trifolium macrocephalum (Pursh) Poir. | 26 images |
| Trifolium microcephalum Pursh | 5 images |
| Trifolium nanum Torr. | 9 images |
| Trifolium oliganthum Steud. | 5 images |
| Trifolium pratense L. | 17411 images |
| Trifolium repens L. | 11961 images |
| Trifolium resupinatum L. | 1352 images |
| Trifolium striatum L. | 235 images |
| Trifolium subterraneum L. | 609 images |
| Trifolium vesiculosum Savi | 71 images |
| Trifolium willdenovii Spreng. | 57 images |
| Trifolium wormskioldii Lehm. | 53 images |
| Triglochin maritima L. | 359 images |
| Triglochin palustris L. | 141 images |
| Trillium albidum J.D.Freeman | 9 images |
| Trillium chloropetalum (Torr.) Howell | 167 images |
| Trillium kurabayashii J.D.Freeman | 16 images |
| Trillium ovatum Pursh | 508 images |
| Triodanis perfoliata (L.) Nieuwl. | 563 images |
| Triphysaria pusilla (Benth.) T.I.Chuang & Heckard | 2 images |
| Tripidium ravennae (L.) H.Scholz | 89 images |
| Tripleurospermum inodorum (L.) Sch.Bip. | 1396 images |
| Tripleurospermum maritimum (L.) W.D.J.Koch | 703 images |
| Tripterocalyx crux-maltae (Kellogg) Standl. | 3 images |
| Trisetum flavescens (L.) P.Beauv. | 548 images |
| Triteleia bridgesii (S.Watson) Greene | 15 images |
| Triteleia clementina Hoover | 1 images |
| Triteleia crocea (Alph.Wood) Greene | 4 images |
| Triteleia dudleyi Hoover | 1 images |
| Triteleia grandiflora Lindl. | 58 images |
| Triteleia hendersonii Greene | 16 images |
| Triteleia hyacinthina (Lindl.) Greene | 86 images |
| Triteleia ixioides (Dryand. ex W.T.Aiton) Greene | 64 images |
| Triteleia laxa Benth. | 601 images |
| Triteleia lilacina Greene | 1 images |
| Triteleia lugens Greene | 12 images |
| Triteleia montana Hoover | 11 images |
| Triteleia peduncularis Lindl. | 10 images |
| Triteleiopsis palmeri (S.Watson) Hoover | 1 images |
| Triticum aestivum L. | 21276 images |
| Trixis californica Kellogg | 40 images |
| Trollius laxus Salisb. | 22 images |
| Tropaeolum majus L. | 9870 images |
| Tropidocarpum gracile Hook. | 24 images |
| Tsuga heterophylla (Raf.) Sarg. | 1032 images |
| Tsuga mertensiana (Bong.) Carrière | 72 images |
| Tuberaria guttata (L.) Fourr. | 2130 images |
| Tulipa clusiana Redouté | 2 images |
| Turritis glabra L. | 842 images |
| Typha × glauca Godr. | 49 images |
| Typha angustifolia L. | 998 images |
| Typha domingensis Pers. | 202 images |
| Typha latifolia L. | 3339 images |
| Ulex europaeus L. | 7161 images |
| Ulmus minor Mill. | 14418 images |
| Ulmus parvifolia Jacq. | 1024 images |
| Ulmus pumila L. | 2840 images |
| Umbellularia californica (Hook. & Arn.) Nutt. | 259 images |
| Urochloa fusca (Sw.) B.F.Hansen & Wunderlin | 16 images |
| Urospermum picroides (L.) Scop. ex F.W.Schmidt | 1174 images |
| Urtica dioica L. | 14218 images |
| Urtica gracilenta Greene | 9 images |
| Urtica gracilis Aiton | 1 images |
| Urtica urens L. | 4165 images |
| Utricularia intermedia Hayne | 80 images |
| Utricularia minor L. | 130 images |
| Utricularia ochroleuca R.W.Hartm. | 13 images |
| Vaccinium cespitosum Michx. | 3 images |
| Vaccinium deliciosum Piper | 11 images |
| Vaccinium membranaceum Douglas ex Torr. | 61 images |
| Vaccinium myrtillus L. | 5343 images |
| Vaccinium ovatum Pursh | 330 images |
| Vaccinium oxycoccos L. | 446 images |
| Vaccinium parvifolium Sm. | 227 images |
| Vaccinium scoparium Leiberg ex Coville | 25 images |
| Vaccinium uliginosum L. | 1465 images |
| Vachellia constricta (Benth.) Seigler & Ebinger | 3 images |
| Vachellia farnesiana (L.) Wight & Arn. | 1434 images |
| Vachellia nilotica (L.) P.J.H.Hurter & Mabb. | 419 images |
| Valeriana acutiloba Rydb. | 2 images |
| Valeriana californica A.Heller | 21 images |
| Valeriana carinata (Loisel.) Christenh. & Byng | 1 images |
| Valeriana ciliosa (Greene) Byng & Christenh. | 29 images |
| Valeriana congesta (Lindl.) Byng & Christenh. | 9 images |
| Valeriana dioica L. | 3006 images |
| Valeriana locusta L. | 6297 images |
| Valeriana occidentalis A.Heller | 7 images |
| Valeriana rubra L. | 20643 images |
| Valeriana sitchensis Bong. | 79 images |
| Vallisneria americana Michx. | 8 images |
| Vancouveria chrysantha Greene | 6 images |
| Vancouveria hexandra C.Morren & Decne. | 18 images |
| Vancouveria planipetala Calloni | 13 images |
| Venegasia carpesioides DC. | 55 images |
| Veratrum californicum Durand | 145 images |
| Veratrum fimbriatum A.Gray | 12 images |
| Veratrum insolitum Jeps. | 8 images |
| Veratrum viride Aiton | 607 images |
| Verbascum blattaria L. | 3173 images |
| Verbascum bombyciferum Boiss. | 18 images |
| Verbascum speciosum Schrad. | 390 images |
| Verbascum thapsus L. | 16216 images |
| Verbascum virgatum Stokes | 1394 images |
| Verbena aristigera S.Moore | 38 images |
| Verbena bipinnatifida Schauer | 397 images |
| Verbena bonariensis L. | 8281 images |
| Verbena bracteata Cav. ex Lag. & Rodr. | 36 images |
| Verbena brasiliensis Vell. | 700 images |
| Verbena californica Moldenke | 6 images |
| Verbena canescens Kunth | 18 images |
| Verbena chiricahensis (Umber) Moldenke | 1 images |
| Verbena gooddingii Briq. | 49 images |
| Verbena hastata L. | 1020 images |
| Verbena incompta P.W.Michael | 5 images |
| Verbena lasiostachys Link | 135 images |
| Verbena macdougalii A.Heller | 18 images |
| Verbena menthifolia Benth. | 12 images |
| Verbena officinalis L. | 7233 images |
| Verbena perennis Wooton | 2 images |
| Verbena rigida Spreng. | 1581 images |
| Verbena stricta Vent. | 314 images |
| Verbena tenera Spreng. | 294 images |
| Verbena urticifolia L. | 751 images |
| Verbena xutha Lehm. | 4 images |
| Verbesina encelioides (Cav.) Benth. & Hook.f. ex A.Gray | 477 images |
| Vernicia fordii (Hemsl.) Airy Shaw | 65 images |
| Veronica anagallis-aquatica L. | 1517 images |
| Veronica arvensis L. | 3059 images |
| Veronica beccabunga L. | 2510 images |
| Veronica catenata Pennell | 108 images |
| Veronica copelandii Eastw. | 9 images |
| Veronica cusickii A.Gray | 18 images |
| Veronica filiformis Sm. | 3039 images |
| Veronica hederifolia L. | 3165 images |
| Veronica officinalis L. | 3088 images |
| Veronica peregrina L. | 320 images |
| Veronica persica Poir. | 14289 images |
| Veronica polita Fr. | 2326 images |
| Veronica scutellata L. | 270 images |
| Veronica serpyllifolia L. | 3398 images |
| Veronica sublobata M.A.Fisch. | 809 images |
| Veronica triphyllos L. | 150 images |
| Veronica wormskjoldii Roem. & Schult. | 5 images |
| Vesper bulbosus (A.Nelson) R.L.Hartm. & G.L.Nesom | 2 images |
| Vesper purpurascens (A.Gray) R.L.Hartm. & G.L.Nesom | 15 images |
| Viburnum edule (Michx.) Raf. | 20 images |
| Viburnum ellipticum Hook. | 29 images |
| Viburnum tinus L. | 21962 images |
| Vicia americana Muhl. ex Willd. | 71 images |
| Vicia hirsuta (L.) Gray | 2037 images |
| Vicia lathyroides L. | 370 images |
| Vicia ludoviciana Nutt. | 28 images |
| Vicia lutea L. | 817 images |
| Vicia nigricans Hook. & Arn. | 16 images |
| Vicia pannonica Crantz | 543 images |
| Vicia sativa L. | 13561 images |
| Vicia tetrasperma (L.) Schreb. | 525 images |
| Vicia villosa Roth | 8404 images |
| Viguiera dentata (Cav.) Spreng. | 108 images |
| Vinca major L. | 16166 images |
| Vincetoxicum nigrum (L.) Moench | 505 images |
| Viola adunca Sm. | 185 images |
| Viola arvensis Murray | 4952 images |
| Viola bakeri Greene | 12 images |
| Viola beckwithii Torr. & A.Gray | 6 images |
| Viola canadensis L. | 223 images |
| Viola cuneata S.Watson | 12 images |
| Viola douglasii Steud. | 30 images |
| Viola glabella Nutt. | 158 images |
| Viola hallii A.Gray | 7 images |
| Viola lobata Benth. | 31 images |
| Viola macloskeyi F.E.Lloyd | 10 images |
| Viola nephrophylla Greene | 1 images |
| Viola nuttallii Pursh | 36 images |
| Viola odorata L. | 14662 images |
| Viola palustris L. | 998 images |
| Viola pedatifida G.Don | 17 images |
| Viola pedunculata Torr. & A.Gray | 4 images |
| Viola pinetorum Greene | 27 images |
| Viola purpurea Kellogg | 113 images |
| Viola riviniana Rchb. | 6237 images |
| Viola sempervirens Greene | 118 images |
| Viola sheltonii Torr. | 23 images |
| Viola sororia Willd. | 1617 images |
| Viola tricolor L. | 7920 images |
| Viola umbraticola Kunth | 1 images |
| Viscum album L. | 2488 images |
| Visnaga daucoides Gaertn. | 1350 images |
| Vitis arizonica Engelm. | 17 images |
| Vitis californica Benth. | 100 images |
| Vitis vinifera L. | 16152 images |
| Volutaria muricata (L.) Maire | 24 images |
| Waltheria indica L. | 412 images |
| Washingtonia filifera (Rafarin) H.Wendl. ex de Bary | 68 images |
| Washingtonia robusta H.Wendl. | 2807 images |
| Watsonia marginata (L.f.) Ker Gawl. | 8 images |
| Watsonia meriana (L.) Mill. | 173 images |
| Whipplea modesta Torr. | 48 images |
| Wigandia urens (Ruiz & Pav.) Kunth | 405 images |
| Wolffia arrhiza (L.) Horkel ex Wimm. | 56 images |
| Wolffia brasiliensis Wedd. | 270 images |
| Wolffia columbiana H.Karst. | 1 images |
| Wolffia globosa (Roxb.) Hartog & Plas | 1 images |
| Woodsia oregana D.C.Eaton | 14 images |
| Woodsia scopulina D.C.Eaton | 9 images |
| Woodwardia fimbriata Sm. | 190 images |
| Woodwardia radicans (L.) Sm. | 375 images |
| Wyethia angustifolia Nutt. | 151 images |
| Wyethia arizonica A.Gray | 2 images |
| Wyethia glabra A.Gray | 1 images |
| Wyethia helenioides Nutt. | 53 images |
| Wyethia helianthoides Nutt. | 10 images |
| Wyethia mollis A.Gray | 1 images |
| Wyethia sagittata (Pursh) Mabb. | 224 images |
| Xanthisma gracile (Nutt.) D.R.Morgan & R.L.Hartm. | 25 images |
| Xanthium chinense Mill. | 1 images |
| Xanthium orientale L. | 453 images |
| Xanthium spinosum L. | 963 images |
| Xanthocephalum gymnospermoides (A.Gray) Benth. & Hook.f. | 3 images |
| Xerophyllum tenax (Pursh) Nutt. | 128 images |
| Xylococcus bicolor Nutt. | 59 images |
| Xylorhiza cognata (H.M.Hall) T.J.Watson | 10 images |
| Xylorhiza glabriuscula Nutt. | 6 images |
| Xylorhiza orcuttii Greene | 16 images |
| Xylorhiza tortifolia Greene | 66 images |
| Yabea microcarpa (Hook. & Arn.) Koso-Pol. | 6 images |
| Yucca angustissima Engelm. ex Trel. | 87 images |
| Yucca baccata Torr. | 124 images |
| Yucca baileyi Wooton & Standl. | 11 images |
| Yucca brevifolia Engelm. | 528 images |
| Yucca elata (Engelm.) Engelm. | 120 images |
| Yucca harrimaniae Trel. | 22 images |
| Yucca madrensis Gentry | 21 images |
| Yucca schidigera Roezl ex Ortgies | 272 images |
| Zannichellia palustris L. | 59 images |
| Zantedeschia aethiopica (L.) Spreng. | 8081 images |
| Zapoteca formosa (Kunth) H.M.Hern. | 37 images |
| Zea mays L. | 23885 images |
| Zeltnera davyi (Jeps.) G.Mans. | 2 images |
| Zeltnera venusta (A.Gray) G.Mans. | 5 images |
| Zeuxine strateumatica (L.) Schltr. | 49 images |
| Zinnia acerosa (DC.) A.Gray | 23 images |
| Zinnia grandiflora Nutt. | 28 images |
| Zinnia peruviana (L.) L. | 2550 images |
| Zizania aquatica L. | 12 images |
| Zizia aptera (A.Gray) Fernald | 217 images |
| Ziziphus jujuba Mill. | 2516 images |
| Zornia reticulata Sm. | 72 images |
| Zostera marina L. | 126 images |
| Zoysia japonica Steud. | 9 images |
| Zuloagaea bulbosa (Kunth) Bess | 1 images |
| Zygophyllum laeve (Standl.) Christenh. & Byng | 44 images |
| Zygophyllum pachyacanthum (Rydb.) Christenh. & Byng | 20 images |