| Abies balsamea (L.) Mill. | 1058 images |
| Abies concolor (Gordon & Glend.) Lindl. ex Hildebr. | 794 images |
| Abutilon theophrasti Medik. | 3414 images |
| Acalypha australis L. | 59 images |
| Acalypha rhomboidea Raf. | 3 images |
| Acalypha virginica L. | 1302 images |
| Acanthospermum australe (Loefl.) Kuntze | 125 images |
| Acanthospermum hispidum DC. | 152 images |
| Acer × freemanii A.E.Murray | 1067 images |
| Acer campestre L. | 22160 images |
| Acer negundo L. | 18501 images |
| Acer palmatum Thunb. | 13170 images |
| Acer pensylvanicum L. | 902 images |
| Acer platanoides L. | 18388 images |
| Acer pseudoplatanus L. | 25632 images |
| Acer rubrum L. | 6761 images |
| Acer saccharinum L. | 8581 images |
| Acer saccharum Marshall | 2755 images |
| Acer spicatum Lam. | 497 images |
| Acer tataricum L. | 3571 images |
| Achillea ageratum L. | 571 images |
| Achillea distans Waldst. & Kit. ex Willd. | 2889 images |
| Achillea filipendulina Lam. | 6457 images |
| Achillea ligustica All. | 440 images |
| Achillea millefolium L. | 26333 images |
| Achillea nobilis L. | 12353 images |
| Achillea ptarmica L. | 4004 images |
| Achyranthes bidentata Blume | 36 images |
| Acicarpha tribuloides Juss. | 44 images |
| Acmella decumbens (Sm.) R.K.Jansen | 12 images |
| Acmispon americanus (Nutt.) Rydb. | 29 images |
| Aconitum columbianum Nutt. | 175 images |
| Aconitum napellus L. | 7590 images |
| Aconitum uncinatum L. | 10 images |
| Acorus calamus L. | 789 images |
| Actaea cordifolia DC. | 1 images |
| Actaea pachypoda Elliott | 935 images |
| Actaea racemosa L. | 773 images |
| Actaea rubra (Aiton) Willd. | 806 images |
| Actinidia arguta (Siebold & Zucc.) Planch. ex Miq. | 399 images |
| Actinidia polygama (Siebold & Zucc.) Planch. ex Maxim. | 2 images |
| Adenocaulon bicolor Hook. | 165 images |
| Adiantum aleuticum (Rupr.) C.A.Paris | 3 images |
| Adiantum capillus-veneris L. | 3493 images |
| Adiantum hispidulum Sw. | 336 images |
| Adiantum pedatum L. | 667 images |
| Adlumia fungosa (Aiton) Britton, Sterns & Poggenb. | 8 images |
| Adonis aestivalis L. | 811 images |
| Adonis vernalis L. | 1520 images |
| Adoxa moschatellina L. | 801 images |
| Aegilops crassa Boiss. ex Hohen. | 11 images |
| Aegilops cylindrica Host | 63 images |
| Aegilops geniculata Roth | 1067 images |
| Aegilops tauschii Coss. | 20 images |
| Aegilops triuncialis L. | 170 images |
| Aegopodium podagraria L. | 13263 images |
| Aeschynomene rudis Benth. | 16 images |
| Aeschynomene villosa Poir. | 65 images |
| Aesculus flava Sol. | 296 images |
| Aesculus glabra Willd. | 1156 images |
| Aesculus hippocastanum L. | 18926 images |
| Aesculus parviflora Walter | 1428 images |
| Aesculus pavia L. | 1673 images |
| Aethusa cynapium L. | 2302 images |
| Agalinis maritima (Raf.) Raf. | 6 images |
| Agalinis purpurea (L.) Pennell | 213 images |
| Agalinis skinneriana (Alph.Wood ex A.Gray) Britton | 8 images |
| Agalinis tenuifolia (Vahl) Raf. | 109 images |
| Agastache foeniculum (Pursh) Kuntze | 2477 images |
| Agastache nepetoides (L.) Kuntze | 80 images |
| Agastache scrophulariifolia (Willd.) Kuntze | 21 images |
| Agave virginica L. | 55 images |
| Ageratina altissima (L.) R.M.King & H.Rob. | 1549 images |
| Ageratina aromatica (L.) Spach | 597 images |
| Ageratum conyzoides L. | 726 images |
| Ageratum houstonianum Mill. | 3725 images |
| Agoseris glauca (Pursh) Raf. | 36 images |
| Agrimonia eupatoria L. | 12893 images |
| Agrimonia gryposepala Wallr. | 435 images |
| Agrimonia pubescens Wallr. | 26 images |
| Agrimonia rostellata Wallr. | 31 images |
| Agrimonia striata Michx. | 20 images |
| Agropyron cristatum (L.) Gaertn. | 137 images |
| Agropyron desertorum (Fisch. ex Link) Schult. | 3 images |
| Agrostemma githago L. | 4450 images |
| Agrostis canina L. | 62 images |
| Agrostis capillaris L. | 2147 images |
| Agrostis exarata Trin. | 11 images |
| Agrostis gigantea Roth | 190 images |
| Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. | 4 images |
| Agrostis mertensii Trin. | 14 images |
| Agrostis pallens Trin. | 4 images |
| Agrostis perennans (Walter) Tuck. | 4 images |
| Agrostis scabra Willd. | 2 images |
| Agrostis stolonifera L. | 426 images |
| Ailanthus altissima (Mill.) Swingle | 14173 images |
| Aira praecox L. | 116 images |
| Ajuga genevensis L. | 4640 images |
| Ajuga reptans L. | 22814 images |
| Akebia quinata (Thunb. ex Houtt.) Decne. | 1284 images |
| Albizia julibrissin Durazz. | 15335 images |
| Alcea rosea L. | 15829 images |
| Alchemilla arvensis (L.) Scop. | 537 images |
| Alchemilla australis (Rydb.) Bomble | 60 images |
| Alchemilla micans Buser | 9 images |
| Alchemilla monticola Opiz | 920 images |
| Aldrovanda vesiculosa L. | 23 images |
| Aletris farinosa L. | 19 images |
| Alisma gramineum Lej. | 27 images |
| Alisma subcordatum Raf. | 37 images |
| Alisma triviale Pursh | 38 images |
| Alkekengi officinarum Moench | 5082 images |
| Alliaria petiolata (M.Bieb.) Cavara & Grande | 32328 images |
| Allium ampeloprasum L. | 6755 images |
| Allium canadense L. | 340 images |
| Allium cepa L. | 2656 images |
| Allium cernuum Roth | 273 images |
| Allium neapolitanum Cirillo | 3450 images |
| Allium rotundum L. | 611 images |
| Allium sativum L. | 1410 images |
| Allium schoenoprasum L. | 4939 images |
| Allium scorodoprasum L. | 1137 images |
| Allium stellatum Nutt. ex Ker Gawl. | 22 images |
| Allium tricoccum Aiton | 422 images |
| Allium tuberosum Rottler ex Spreng. | 1526 images |
| Allium vineale L. | 3637 images |
| Alnus alnobetula (Ehrh.) K.Koch | 2014 images |
| Alnus glutinosa (L.) Gaertn. | 17860 images |
| Alnus incana (L.) Moench | 3287 images |
| Alnus serrulata (Aiton) Willd. | 156 images |
| Alopecurus aequalis Sobol. | 141 images |
| Alopecurus carolinianus Walter | 4 images |
| Alopecurus geniculatus L. | 138 images |
| Alopecurus myosuroides Huds. | 585 images |
| Alopecurus pratensis L. | 3022 images |
| Alopecurus rendlei Eig | 42 images |
| Alternanthera paronychioides A.St.-Hil. | 62 images |
| Alternanthera pungens Kunth | 182 images |
| Althaea officinalis L. | 3889 images |
| Alyssum alyssoides (L.) L. | 1170 images |
| Amaranthus albus L. | 609 images |
| Amaranthus blitoides S.Watson | 596 images |
| Amaranthus blitum L. | 2588 images |
| Amaranthus cannabinus (L.) J.D.Sauer | 2 images |
| Amaranthus caudatus L. | 4054 images |
| Amaranthus cruentus L. | 1371 images |
| Amaranthus deflexus L. | 2035 images |
| Amaranthus graecizans L. | 39 images |
| Amaranthus hybridus L. | 1734 images |
| Amaranthus hypochondriacus L. | 1514 images |
| Amaranthus palmeri S.Watson | 133 images |
| Amaranthus powellii S.Watson | 143 images |
| Amaranthus pumilus Raf. | 5 images |
| Amaranthus retroflexus L. | 9545 images |
| Amaranthus spinosus L. | 1589 images |
| Amaranthus viridis L. | 1904 images |
| Ambrosia artemisiifolia L. | 5822 images |
| Ambrosia bidentata Michx. | 20 images |
| Ambrosia psilostachya DC. | 446 images |
| Ambrosia trifida L. | 1183 images |
| Amelanchier × lamarckii F.G.Schroed. | 2641 images |
| Amelanchier alnifolia (Nutt.) Nutt. ex M.Roem. | 848 images |
| Amelanchier arborea (F.Michx.) Fernald | 37 images |
| Amelanchier bartramiana (Tausch) M.Roem. | 4 images |
| Amelanchier canadensis (L.) Medik. | 2848 images |
| Amelanchier interior E.L.Nielsen | 2 images |
| Amelanchier laevis Wiegand | 205 images |
| Amelanchier obovalis (Michx.) Ashe | 2 images |
| Amelanchier stolonifera Wiegand | 9 images |
| Amianthium muscitoxicum (Walter) A.Gray | 26 images |
| Ammannia coccinea Rottb. | 54 images |
| Ammannia latifolia L. | 22 images |
| Ammannia robusta Heer & Regel | 7 images |
| Ammi majus L. | 2618 images |
| Amorpha canescens Pursh | 254 images |
| Amorpha fruticosa L. | 2320 images |
| Ampelopsis aconitifolia Bunge | 57 images |
| Ampelopsis cordata Michx. | 494 images |
| Ampelopsis glandulosa (Wall.) Momiy. | 163 images |
| Amphiachyris dracunculoides (DC.) Nutt. | 108 images |
| Amphicarpaea bracteata (L.) Fernald | 500 images |
| Amsinckia lycopsoides Lindl. ex Lehm. | 1 images |
| Amsinckia menziesii (Lehm.) A.Nelson & J.F.Macbr. | 236 images |
| Amsinckia spectabilis Fisch. & C.A.Mey. | 1 images |
| Amsonia tabernaemontana Walter | 907 images |
| Anaphalis margaritacea (L.) Benth. & Hook.f. | 1572 images |
| Anchusa arvensis (L.) M.Bieb. | 2914 images |
| Anchusa azurea Mill. | 3367 images |
| Anchusa officinalis L. | 5466 images |
| Andersonglossum virginianum (L.) J.I.Cohen | 265 images |
| Andromeda polifolia L. | 692 images |
| Andropogon gerardi Vitman | 234 images |
| Andropogon glomeratus (Walter) Britton, Sterns & Poggenb. | 7 images |
| Andropogon gyrans Ashe | 10 images |
| Andropogon hallii Hack. | 3 images |
| Andropogon ternarius Michx. | 35 images |
| Andropogon virginicus L. | 3 images |
| Androsace maxima L. | 140 images |
| Androsace occidentalis Pursh | 5 images |
| Anemonastrum canadense (L.) Mosyakin | 1053 images |
| Anemone caroliniana Walter | 9 images |
| Anemone cylindrica A.Gray | 15 images |
| Anemone multifida Poir. | 144 images |
| Anemone virginiana L. | 411 images |
| Anemonella thalictroides (L.) Spach | 406 images |
| Anemonoides lancifolia (Pursh) Holub | 6 images |
| Anemonoides quinquefolia (L.) Holub | 1354 images |
| Anethum graveolens L. | 2971 images |
| Angelica atropurpurea L. | 428 images |
| Angelica lucida L. | 55 images |
| Angelica triquinata Michx. | 30 images |
| Anoda cristata (L.) Schltdl. | 68 images |
| Antennaria howellii Greene | 24 images |
| Antennaria neglecta Greene | 203 images |
| Antennaria parlinii Fernald | 24 images |
| Antennaria parvifolia Nutt. | 100 images |
| Antennaria plantaginifolia (L.) Hook. | 215 images |
| Antennaria rosea Greene | 6 images |
| Antennaria solitaria Rydb. | 6 images |
| Antennaria virginica Stebbins | 4 images |
| Anthemis arvensis L. | 4389 images |
| Anthemis cotula L. | 1780 images |
| Anthoxanthum aristatum Boiss. | 59 images |
| Anthoxanthum nitens (Weber) Y.Schouten & Veldkamp | 84 images |
| Anthoxanthum odoratum L. | 2282 images |
| Anthoxanthum ovatum Lag. | 3 images |
| Anthriscus caucalis M.Bieb. | 1886 images |
| Anthriscus cerefolium (L.) Hoffm. | 3653 images |
| Anthriscus sylvestris (L.) Hoffm. | 20337 images |
| Anthyllis vulneraria L. | 9713 images |
| Anticlea elegans (Pursh) Rydb. | 67 images |
| Antirrhinum majus L. | 15941 images |
| Apera interrupta (L.) P.Beauv. | 32 images |
| Apera spica-venti (L.) P.Beauv. | 114 images |
| Apios americana Medik. | 356 images |
| Apium graveolens L. | 2108 images |
| Aplectrum hyemale (Muhl. ex Willd.) Torr. | 33 images |
| Apocynum androsaemifolium L. | 1134 images |
| Apocynum cannabinum L. | 1128 images |
| Aquarius cordifolius (L.) Christenh. & Byng | 95 images |
| Aquilegia canadensis L. | 2152 images |
| Aquilegia vulgaris L. | 21188 images |
| Arabidopsis lyrata (L.) O'Kane & Al-Shehbaz | 2 images |
| Arabidopsis thaliana (L.) Heynh. | 2225 images |
| Arabis alpina L. | 1937 images |
| Arabis caucasica Willd. | 796 images |
| Aralia elata (Miq.) Seem. | 934 images |
| Aralia hispida Vent. | 100 images |
| Aralia nudicaulis L. | 940 images |
| Aralia racemosa L. | 320 images |
| Aralia spinosa L. | 475 images |
| Arctium × nothum (Ruhmer) J.Weiss | 10 images |
| Arctium lappa L. | 11298 images |
| Arctium minus (Hill) Bernh. | 12714 images |
| Arctium tomentosum Mill. | 2427 images |
| Arctostaphylos uva-ursi (L.) Spreng. | 2337 images |
| Arctous alpina (L.) Nied. | 338 images |
| Arenaria serpyllifolia L. | 1584 images |
| Arethusa bulbosa L. | 42 images |
| Argemone albiflora Hornem. | 256 images |
| Argemone mexicana L. | 1285 images |
| Argentina anserina (L.) Rydb. | 5681 images |
| Arisaema dracontium (L.) Schott | 371 images |
| Arisaema stewardsonii Britton | 1 images |
| Arisaema triphyllum (L.) Schott | 2260 images |
| Aristida adscensionis L. | 169 images |
| Aristolochia clematitis L. | 3278 images |
| Aristolochia macrophylla Lam. | 909 images |
| Aristolochia serpentaria L. | 19 images |
| Aristolochia tomentosa Sims | 94 images |
| Armoracia rusticana G.Gaertn., B.Mey. & Scherb. | 301 images |
| Arnica cordifolia Hook. | 228 images |
| Arnica lanceolata Nutt. | 22 images |
| Arnoglossum atriplicifolium (L.) H.Rob. | 97 images |
| Arnoglossum plantagineum Raf. | 56 images |
| Aronia × prunifolia (Marshall) Rehder | 11 images |
| Aronia arbutifolia (L.) Pers. | 220 images |
| Aronia melanocarpa (Michx.) Elliott | 3512 images |
| Arrhenatherum elatius (L.) P.Beauv. ex J.Presl & C.Presl | 2490 images |
| Artemisia abrotanum L. | 1614 images |
| Artemisia absinthium L. | 5641 images |
| Artemisia annua L. | 3955 images |
| Artemisia biennis Willd. | 173 images |
| Artemisia campestris L. | 2011 images |
| Artemisia dracunculus L. | 2676 images |
| Artemisia frigida Willd. | 147 images |
| Artemisia ludoviciana Nutt. | 1348 images |
| Artemisia pontica L. | 98 images |
| Artemisia stelleriana Besser | 234 images |
| Artemisia tridentata Nutt. | 369 images |
| Artemisia umbelliformis Lam. | 400 images |
| Artemisia vulgaris L. | 19096 images |
| Arthraxon hispidus (Thunb.) Makino | 52 images |
| Arum italicum Mill. | 19015 images |
| Aruncus dioicus (Walter) Fernald | 5336 images |
| Arundinaria gigantea (Walter) Muhl. | 219 images |
| Arundinaria tecta (Walter) Muhl. | 4 images |
| Arundo donax L. | 3493 images |
| Asarum canadense L. | 671 images |
| Asarum heterophyllum Ashe | 1 images |
| Asarum virginicum L. | 37 images |
| Asclepias amplexicaulis Sm. | 60 images |
| Asclepias exaltata L. | 115 images |
| Asclepias hirtella (Pennell) Woodson | 18 images |
| Asclepias incarnata L. | 1346 images |
| Asclepias lanceolata Walter | 8 images |
| Asclepias longifolia Michx. | 17 images |
| Asclepias meadii Torr. ex A.Gray | 3 images |
| Asclepias ovalifolia Decne. | 8 images |
| Asclepias perennis Walter | 44 images |
| Asclepias purpurascens L. | 691 images |
| Asclepias quadrifolia Jacq. | 96 images |
| Asclepias rubra L. | 9 images |
| Asclepias speciosa Torr. | 776 images |
| Asclepias sullivantii Engelm. ex A.Gray | 329 images |
| Asclepias syriaca L. | 4372 images |
| Asclepias tuberosa L. | 2681 images |
| Asclepias variegata L. | 148 images |
| Asclepias verticillata L. | 207 images |
| Asclepias viridiflora Raf. | 215 images |
| Asclepias viridis Walter | 536 images |
| Asimina triloba (L.) Dunal | 1643 images |
| Asparagus officinalis L. | 3591 images |
| Asperugo procumbens L. | 473 images |
| Asperula arvensis L. | 169 images |
| Asplenium × alternifolium Wulfen | 4 images |
| Asplenium bradleyi D.C.Eaton | 1 images |
| Asplenium montanum Willd. | 23 images |
| Asplenium pinnatifidum Nutt. | 3 images |
| Asplenium platyneuron (L.) Britton, Sterns & Poggenb. | 377 images |
| Asplenium resiliens Kunze | 11 images |
| Asplenium rhizophyllum L. | 76 images |
| Asplenium ruta-muraria L. | 2266 images |
| Asplenium scolopendrium L. | 7180 images |
| Asplenium septentrionale (L.) Hoffm. | 448 images |
| Asplenium trichomanes L. | 6805 images |
| Asplenium viride Huds. | 632 images |
| Aster tataricus L.f. | 68 images |
| Astilbe biternata (Vent.) Britton | 1 images |
| Astilbe japonica (C.Morren & Decne.) A.Gray | 3394 images |
| Astragalus alpinus L. | 439 images |
| Astragalus canadensis L. | 52 images |
| Astragalus cicer L. | 442 images |
| Astragalus glycyphyllos L. | 1940 images |
| Athysanus pusillus (Hook.) Greene | 1 images |
| Atocion armeria (L.) Raf. | 3141 images |
| Atriplex argentea Nutt. | 3 images |
| Atriplex glabriuscula Edmondston | 98 images |
| Atriplex hortensis L. | 1192 images |
| Atriplex laciniata L. | 565 images |
| Atriplex littoralis L. | 391 images |
| Atriplex micrantha Ledeb. | 74 images |
| Atriplex patula L. | 888 images |
| Atriplex prostrata Boucher ex DC. | 1623 images |
| Atriplex rosea L. | 50 images |
| Atriplex tatarica L. | 165 images |
| Aureolaria flava (L.) Farw. | 60 images |
| Aureolaria grandiflora (Benth.) Pennell | 53 images |
| Aureolaria levigata (Raf.) Raf. | 6 images |
| Aureolaria virginica (L.) Pennell | 37 images |
| Aurinia petraea (Ard.) Schur | 26 images |
| Aurinia saxatilis (L.) Desv. | 2974 images |
| Avena barbata Pott ex Link | 1356 images |
| Avena fatua L. | 2894 images |
| Avena sativa L. | 3943 images |
| Avena sterilis L. | 267 images |
| Avena strigosa Schreb. | 25 images |
| Avenella flexuosa (L.) Drejer | 549 images |
| Avenula pubescens (Huds.) Dumort. | 133 images |
| Azolla caroliniana Willd. | 20 images |
| Azolla filiculoides Lam. | 365 images |
| Baccharis halimifolia L. | 1905 images |
| Bacopa rotundifolia (Michx.) Wettst. | 7 images |
| Ballota nigra L. | 5964 images |
| Baptisia alba (L.) R.Br. | 150 images |
| Baptisia australis (L.) R.Br. | 1343 images |
| Baptisia tinctoria (L.) R.Br. | 57 images |
| Barbarea orthoceras Ledeb. | 572 images |
| Barbarea stricta Andrz. ex Besser | 80 images |
| Barbarea verna (Mill.) Asch. | 1627 images |
| Barbarea vulgaris W.T.Aiton | 1319 images |
| Bassia hyssopifolia (Pall.) Kuntze | 52 images |
| Bassia scoparia (L.) A.J.Scott | 566 images |
| Beckmannia syzigachne (Steud.) Fernald | 18 images |
| Bellis perennis L. | 15051 images |
| Berberis aquifolium Pursh | 17331 images |
| Berberis canadensis Mill. | 22 images |
| Berberis julianae C.K.Schneid. | 3436 images |
| Berberis koreana Palib. | 31 images |
| Berberis thunbergii DC. | 9785 images |
| Berberis vulgaris L. | 5938 images |
| Berteroa incana (L.) DC. | 5603 images |
| Berula erecta (Huds.) Coville | 880 images |
| Beta vulgaris L. | 9746 images |
| Betonica macrantha K.Koch | 453 images |
| Betonica officinalis L. | 7573 images |
| Betula × caerulea Blanch. | 8 images |
| Betula alleghaniensis Britton | 315 images |
| Betula cordifolia Regel | 7 images |
| Betula glandulosa Michx. | 10 images |
| Betula lenta L. | 173 images |
| Betula nigra L. | 990 images |
| Betula papyrifera Marshall | 585 images |
| Betula pendula Roth | 12408 images |
| Betula populifolia Marshall | 82 images |
| Betula pubescens Ehrh. | 7066 images |
| Betula pumila L. | 11 images |
| Bidens alba (L.) DC. | 374 images |
| Bidens aristosa (Michx.) Britton | 201 images |
| Bidens bipinnata L. | 1390 images |
| Bidens cernua L. | 590 images |
| Bidens connata Muhl. ex Willd. | 68 images |
| Bidens frondosa L. | 3554 images |
| Bidens tripartita L. | 1314 images |
| Bidens vulgata Greene | 81 images |
| Bifora radians M.Bieb. | 171 images |
| Bignonia capreolata L. | 623 images |
| Bistorta officinalis Delarbre | 7609 images |
| Bistorta vivipara (L.) Delarbre | 1480 images |
| Blepharipappus scaber Hook. | 23 images |
| Blephilia ciliata (L.) Raf. ex Benth. | 82 images |
| Blephilia hirsuta (Pursh) Benth. | 92 images |
| Bletia spicata (Walter) Sosa & M.W.Chase | 18 images |
| Blitum bonus-henricus (L.) Rchb. | 1678 images |
| Blitum capitatum L. | 236 images |
| Blitum virgatum L. | 139 images |
| Boechera drummondii (A.Gray) Á.Löve & D.Löve | 3 images |
| Boehmeria cylindrica (L.) Sw. | 688 images |
| Bolboschoenus fluviatilis (Torr.) Soják | 3 images |
| Bolboschoenus glaucus (Lam.) S.G.Sm. | 21 images |
| Bolboschoenus maritimus (L.) Palla | 891 images |
| Boltonia asteroides L'Hér. | 5 images |
| Borago officinalis L. | 21262 images |
| Borodinia laevigata (Muhl. ex Willd.) P.J.Alexander & Windham | 4 images |
| Bothriochloa ischaemum (L.) Keng | 643 images |
| Botrychium dissectum Spreng. | 173 images |
| Botrychium lunaria (L.) Sw. | 597 images |
| Botrychium multifidum (S.G.Gmel.) Rupr. | 2 images |
| Botrychium simplex E.Hitchc. | 49 images |
| Botrychium virginianum (L.) Sw. | 232 images |
| Bouteloua aristidoides (Kunth) Griseb. | 4 images |
| Bouteloua curtipendula (Michx.) Torr. | 125 images |
| Bouteloua gracilis (Kunth) Lag. ex Griffiths | 78 images |
| Bouteloua rigidiseta (Steud.) Hitchc. | 21 images |
| Bouteloua simplex Lag. | 10 images |
| Boykinia aconitifolia Nutt. | 7 images |
| Brachypodium pinnatum (L.) P.Beauv. | 575 images |
| Brachypodium sylvaticum (Huds.) P.Beauv. | 1831 images |
| Brasenia schreberi J.F.Gmel. | 16 images |
| Brassica juncea (L.) Czern. | 1836 images |
| Brassica napus L. | 10273 images |
| Brassica oleracea L. | 9336 images |
| Brassica rapa L. | 4170 images |
| Brickellia eupatorioides (L.) Shinners | 86 images |
| Briza maxima L. | 2118 images |
| Briza media L. | 1159 images |
| Briza minor L. | 353 images |
| Bromus arvensis L. | 157 images |
| Bromus catharticus Vahl | 500 images |
| Bromus ciliatus L. | 1 images |
| Bromus commutatus Schrad. | 103 images |
| Bromus diandrus Roth | 1399 images |
| Bromus erectus Huds. | 1165 images |
| Bromus grossus Desf. ex DC. | 1 images |
| Bromus hordeaceus L. | 3142 images |
| Bromus inermis Leyss. | 862 images |
| Bromus kalmii A.Gray | 1 images |
| Bromus lanceolatus Roth | 76 images |
| Bromus latiglumis (Shear) Hitchc. | 2 images |
| Bromus madritensis L. | 561 images |
| Bromus marginatus Nees ex Steud. | 1 images |
| Bromus pubescens Muhl. ex Willd. | 5 images |
| Bromus racemosus L. | 192 images |
| Bromus ramosus Huds. | 294 images |
| Bromus rigidus Roth | 14 images |
| Bromus rubens L. | 400 images |
| Bromus scoparius L. | 13 images |
| Bromus secalinus L. | 252 images |
| Bromus squarrosus L. | 135 images |
| Bromus sterilis L. | 2952 images |
| Bromus tectorum L. | 463 images |
| Broussonetia papyrifera (L.) L'Hér. ex Vent. | 3148 images |
| Brunnera macrophylla (Adams) I.M.Johnst. | 4647 images |
| Bryonia alba L. | 3229 images |
| Buddleja alternifolia Maxim. | 629 images |
| Buddleja davidii Franch. | 18006 images |
| Buglossoides arvensis (L.) I.M.Johnst. | 1199 images |
| Bulbostylis capillaris (L.) Kunth ex C.B.Clarke | 2 images |
| Bunias erucago L. | 1248 images |
| Bunias orientalis L. | 2657 images |
| Bupleurum lancifolium Hornem. | 31 images |
| Bupleurum rotundifolium L. | 551 images |
| Butomus umbellatus L. | 1824 images |
| Buxus sempervirens L. | 10174 images |
| Cabomba caroliniana A.Gray | 63 images |
| Cakile edentula (Bigelow) Hook. | 282 images |
| Cakile maritima Scop. | 7103 images |
| Calamagrostis arenaria (L.) Roth | 1850 images |
| Calamagrostis breviligulata (Fernald) Saarela | 70 images |
| Calamagrostis canadensis (Michx.) P.Beauv. | 4 images |
| Calamagrostis epigejos (L.) Roth | 3507 images |
| Calamagrostis purpurea (Trin.) Trin. | 25 images |
| Calamagrostis stricta (Timm) Koeler | 35 images |
| Calandrinia ciliata (Ruiz & Pav.) DC. | 37 images |
| Calendula officinalis L. | 16547 images |
| Calibrachoa parviflora (Juss.) D'Arcy | 2996 images |
| Calla palustris L. | 771 images |
| Callirhoe involucrata (Torr. & A.Gray) A.Gray | 58 images |
| Callistephus chinensis (L.) Nees | 4625 images |
| Callitriche hermaphroditica L. | 7 images |
| Callitriche heterophylla Pursh | 3 images |
| Callitriche palustris L. | 449 images |
| Callitriche stagnalis Scop. | 773 images |
| Callitriche terrestris Raf. | 5 images |
| Calluna vulgaris (L.) Hull | 10211 images |
| Calopogon tuberosus (L.) Britton, Sterns & Poggenb. | 79 images |
| Caltha palustris L. | 11106 images |
| Calycanthus floridus L. | 2504 images |
| Calycocarpum lyonii (Pursh) Nutt. ex A.Gray | 1 images |
| Calypso bulbosa (L.) Oakes | 455 images |
| Calystegia hederacea Wall. | 18 images |
| Calystegia sepium (L.) R.Br. | 10538 images |
| Calystegia silvatica (Kit.) Griseb. | 2783 images |
| Calystegia spithamaea (L.) Pursh | 19 images |
| Camassia angusta (Engelm. & A.Gray) Blank. | 5 images |
| Camassia scilloides (Raf.) Cory | 150 images |
| Camelina microcarpa Andrz. ex DC. | 118 images |
| Camelina sativa (L.) Crantz | 239 images |
| Campanula bononiensis L. | 264 images |
| Campanula carpatica Jacq. | 880 images |
| Campanula divaricata Michx. | 36 images |
| Campanula glomerata L. | 8710 images |
| Campanula lactiflora M.Bieb. | 549 images |
| Campanula lanata Friv. | 13 images |
| Campanula latifolia L. | 1814 images |
| Campanula medium L. | 3161 images |
| Campanula patula L. | 5264 images |
| Campanula persicifolia L. | 11025 images |
| Campanula punctata Lam. | 480 images |
| Campanula rapunculoides L. | 6071 images |
| Campanula trachelium L. | 11088 images |
| Campanulastrum americanum (L.) Small | 401 images |
| Campsis radicans (L.) Bureau | 7902 images |
| Cannabis sativa L. | 5968 images |
| Capnoides sempervirens (L.) Borkh. | 124 images |
| Capsella bursa-pastoris (L.) Medik. | 10357 images |
| Capsicum annuum L. | 12712 images |
| Caragana arborescens Lam. | 1908 images |
| Cardamine angustata O.E.Schulz | 13 images |
| Cardamine bellidifolia L. | 32 images |
| Cardamine bulbosa (Schreb. ex Muhl.) Britton, Sterns & Poggenb. | 27 images |
| Cardamine concatenata (Michx.) O.Schwarz | 394 images |
| Cardamine diphylla (Michx.) Alph.Wood | 66 images |
| Cardamine douglassii Britton | 7 images |
| Cardamine flexuosa With. | 5602 images |
| Cardamine hirsuta L. | 4228 images |
| Cardamine impatiens L. | 1852 images |
| Cardamine parviflora L. | 1991 images |
| Cardamine pensylvanica Muhl. ex Willd. | 7 images |
| Cardamine pratensis L. | 17410 images |
| Cardiospermum halicacabum L. | 1399 images |
| Carduus acanthoides L. | 4248 images |
| Carduus crispus L. | 903 images |
| Carduus nutans L. | 5203 images |
| Carduus pycnocephalus L. | 4685 images |
| Carduus tenuiflorus Curtis | 1497 images |
| Carex acutiformis Ehrh. | 1941 images |
| Carex albolutescens Schwein. | 5 images |
| Carex aquatilis Wahlenb. | 21 images |
| Carex arcta Boott | 6 images |
| Carex atherodes Spreng. | 5 images |
| Carex aurea Nutt. | 18 images |
| Carex baileyi Britton | 1 images |
| Carex barrattii Torr. ex Schwein. | 1 images |
| Carex bigelowii Torr. ex Schwein. | 26 images |
| Carex blanda Dewey | 41 images |
| Carex bromoides Willd. | 4 images |
| Carex brunnea Thunb. | 13 images |
| Carex brunnescens (Pers.) Poir. | 41 images |
| Carex bushii Mack. | 5 images |
| Carex buxbaumii Wahlenb. | 73 images |
| Carex canescens L. | 138 images |
| Carex capillaris L. | 53 images |
| Carex careyana Torr. ex Dewey | 8 images |
| Carex caroliniana Schwein. | 1 images |
| Carex caryophyllea Latourr. | 736 images |
| Carex cephalophora Muhl. ex Willd. | 20 images |
| Carex chordorrhiza L.f. | 39 images |
| Carex comosa Boott | 44 images |
| Carex conjuncta Boott | 6 images |
| Carex crinita Lam. | 83 images |
| Carex crus-corvi Shuttlew. ex Kunze | 1 images |
| Carex cryptolepis Mack. | 8 images |
| Carex cumulata (L.H.Bailey) Mack. | 1 images |
| Carex decomposita Muhl. | 3 images |
| Carex demissa Hornem. | 13 images |
| Carex deweyana Schwein. | 7 images |
| Carex diandra Schrank | 81 images |
| Carex disperma Dewey | 3 images |
| Carex distans L. | 173 images |
| Carex disticha Huds. | 135 images |
| Carex divulsa Stokes | 788 images |
| Carex eburnea Boott | 28 images |
| Carex echinata Murray | 318 images |
| Carex emoryi Dewey | 8 images |
| Carex extensa Gooden. | 127 images |
| Carex ferruginea Scop. | 60 images |
| Carex festucacea Willd. | 1 images |
| Carex flacca Schreb. | 2084 images |
| Carex flava L. | 334 images |
| Carex folliculata L. | 5 images |
| Carex formosa Dewey | 1 images |
| Carex frankii Kunth | 25 images |
| Carex fuscula d'Urv. | 4 images |
| Carex garberi Fernald | 1 images |
| Carex gracillima Schwein. | 24 images |
| Carex granularis Muhl. ex Willd. | 12 images |
| Carex grayi J.Carey | 309 images |
| Carex grisea Wahlenb. | 22 images |
| Carex heleonastes Ehrh. ex L.f. | 23 images |
| Carex hirsutella Mack. | 14 images |
| Carex hirta L. | 940 images |
| Carex hirtifolia Mack. | 9 images |
| Carex hitchcockiana Dewey | 1 images |
| Carex hostiana DC. | 75 images |
| Carex hyalinolepis Steud. | 5 images |
| Carex hystericina Muhl. ex Willd. | 33 images |
| Carex inops L.H.Bailey | 1 images |
| Carex intumescens Rudge | 122 images |
| Carex jamesii Schwein. | 9 images |
| Carex kobomugi Ohwi | 3 images |
| Carex lacustris Willd. | 15 images |
| Carex laevivaginata (Kük.) Mack. | 1 images |
| Carex lasiocarpa Ehrh. | 53 images |
| Carex laxiflora Lam. | 8 images |
| Carex lenticularis Michx. | 5 images |
| Carex leporina L. | 333 images |
| Carex limosa L. | 121 images |
| Carex livida (Wahlenb.) Willd. | 6 images |
| Carex longii Mack. | 13 images |
| Carex lupuliformis Sartwell ex Dewey | 8 images |
| Carex lupulina Muhl. ex Willd. | 91 images |
| Carex lurida Wahlenb. | 127 images |
| Carex magellanica Lam. | 67 images |
| Carex meadii Dewey | 6 images |
| Carex mesochorea Mack. | 2 images |
| Carex michauxiana Boeckeler | 3 images |
| Carex molesta Mack. | 8 images |
| Carex montana L. | 208 images |
| Carex muehlenbergii Willd. | 3 images |
| Carex muricata L. | 101 images |
| Carex muskingumensis Schwein. | 153 images |
| Carex nigra (L.) Reichard | 535 images |
| Carex nigromarginata Schwein. | 3 images |
| Carex normalis Mack. | 17 images |
| Carex oederi Retz. | 312 images |
| Carex oligosperma Michx. | 9 images |
| Carex pairae F.W.Schultz | 76 images |
| Carex paleacea Schreb. ex Wahlenb. | 8 images |
| Carex pallescens L. | 353 images |
| Carex panicea L. | 254 images |
| Carex pauciflora Lightf. | 91 images |
| Carex pedunculata Muhl. ex Willd. | 22 images |
| Carex pensylvanica Lam. | 92 images |
| Carex picta Steud. | 16 images |
| Carex plantaginea Lam. | 197 images |
| Carex platyphylla J.Carey | 8 images |
| Carex prairea Dewey ex Alph.Wood | 2 images |
| Carex praticola Rydb. | 1 images |
| Carex pseudocyperus L. | 518 images |
| Carex radiata (Wahlenb.) Small | 39 images |
| Carex rariflora (Wahlenb.) Sm. | 2 images |
| Carex retrorsa Schwein. | 12 images |
| Carex rosea Willd. | 1 images |
| Carex rostrata Stokes | 374 images |
| Carex sartwellii Dewey | 4 images |
| Carex scabrata Schwein. | 11 images |
| Carex scirpoidea Michx. | 2 images |
| Carex secalina Willd. ex Wahlenb. | 3 images |
| Carex shortiana Dewey & Torr. | 4 images |
| Carex sparganioides Muhl. ex Willd. | 18 images |
| Carex spicata Huds. | 444 images |
| Carex sprengelii Dewey ex Spreng. | 7 images |
| Carex squarrosa L. | 29 images |
| Carex sterilis Willd. | 3 images |
| Carex stipata Muhl. ex Willd. | 63 images |
| Carex straminea Willd. ex Schkuhr | 1 images |
| Carex stricta Lam. | 53 images |
| Carex swanii (Fernald) Mack. | 8 images |
| Carex sylvatica Huds. | 1628 images |
| Carex tenera Dewey | 8 images |
| Carex tenuiflora Wahlenb. | 2 images |
| Carex torta Boott ex Tuck. | 5 images |
| Carex tribuloides Wahlenb. | 26 images |
| Carex trichocarpa Muhl. ex Willd. | 15 images |
| Carex typhina Michx. | 4 images |
| Carex utriculata Boott | 10 images |
| Carex vaginata Tausch | 64 images |
| Carex vesicaria L. | 342 images |
| Carex virescens Muhl. ex Willd. | 6 images |
| Carex vulpinoidea Michx. | 139 images |
| Carex woodii Dewey | 2 images |
| Carlina vulgaris L. | 2379 images |
| Carpinus betulus L. | 22039 images |
| Carpinus caroliniana Walter | 532 images |
| Carthamus lanatus L. | 1831 images |
| Carthamus tinctorius L. | 1104 images |
| Carum carvi L. | 1566 images |
| Carya cordiformis (Wangenh.) K.Koch | 114 images |
| Carya glabra (Mill.) Sweet | 2634 images |
| Carya illinoinensis (Wangenh.) K.Koch | 1094 images |
| Carya laciniosa (F.Michx.) G.Don | 29 images |
| Carya ovata (Mill.) K.Koch | 454 images |
| Carya pallida (Ashe) Engelm. & Graebn. | 26 images |
| Carya texana Buckley | 1 images |
| Carya tomentosa (Lam.) Nutt. | 119 images |
| Cassiope hypnoides (L.) D.Don | 54 images |
| Castanea × neglecta Dode | 2 images |
| Castanea crenata Siebold & Zucc. | 952 images |
| Castanea dentata (Marshall) Borkh. | 1044 images |
| Castanea mollissima Blume | 95 images |
| Castanea pumila (L.) Mill. | 62 images |
| Castanea sativa Mill. | 15222 images |
| Castilleja coccinea (L.) Spreng. | 109 images |
| Castilleja septentrionalis Lindl. | 28 images |
| Catalpa bignonioides Walter | 15453 images |
| Catalpa ovata G.Don | 2351 images |
| Catalpa speciosa Teas | 785 images |
| Catapodium rigidum (L.) C.E.Hubb. | 499 images |
| Caucalis platycarpos L. | 488 images |
| Caulophyllum thalictroides (L.) Michx. | 507 images |
| Ceanothus americanus L. | 838 images |
| Ceanothus herbaceus Raf. | 35 images |
| Ceanothus sanguineus Pursh | 14 images |
| Celastrus orbiculatus Thunb. | 965 images |
| Celastrus scandens L. | 1183 images |
| Celosia argentea L. | 11056 images |
| Celtis laevigata Willd. | 670 images |
| Celtis occidentalis L. | 4420 images |
| Celtis tenuifolia Nutt. | 47 images |
| Cenchrus alopecuroides (L.) Thunb. | 877 images |
| Cenchrus americanus (L.) Morrone | 145 images |
| Cenchrus biflorus Roxb. | 72 images |
| Cenchrus ciliaris L. | 567 images |
| Cenchrus echinatus L. | 149 images |
| Cenchrus longisetus M.C.Johnst. | 1270 images |
| Cenchrus longispinus (Hack.) Fernald | 102 images |
| Cenchrus spinifex Cav. | 45 images |
| Cenchrus tribuloides L. | 1 images |
| Centaurea × gerstlaueri Erdner | 1 images |
| Centaurea aspera L. | 3868 images |
| Centaurea benedicta (L.) L. | 368 images |
| Centaurea calcitrapa L. | 1906 images |
| Centaurea cyanus L. | 18254 images |
| Centaurea diffusa Lam. | 263 images |
| Centaurea diluta Aiton | 27 images |
| Centaurea jacea L. | 15521 images |
| Centaurea macrocephala Muss.Puschk. ex Willd. | 563 images |
| Centaurea melitensis L. | 855 images |
| Centaurea montana L. | 9859 images |
| Centaurea nigra L. | 9257 images |
| Centaurea nigrescens Willd. | 1301 images |
| Centaurea phrygia L. | 608 images |
| Centaurea pungens Pomel | 38 images |
| Centaurea scabiosa L. | 9584 images |
| Centaurea solstitialis L. | 1412 images |
| Centaurea stoebe L. | 1156 images |
| Centaurea virgata Lam. | 46 images |
| Centaurium erythraea Rafn | 8831 images |
| Centaurium pulchellum (Sw.) Hayek ex Hand.-Mazz., Stadlm., Janch. & Faltis | 70 images |
| Centella erecta (L.f.) Fernald | 21 images |
| Centromadia pungens Greene | 3 images |
| Centrosema virginianum (L.) Benth. | 573 images |
| Cephalanthus occidentalis L. | 1539 images |
| Cephalaria gigantea (Ledeb.) Bobrov | 784 images |
| Cerastium arvense L. | 5475 images |
| Cerastium brachypetalum Desp. ex Pers. | 72 images |
| Cerastium glomeratum Thuill. | 4829 images |
| Cerastium holosteoides Fr. | 18 images |
| Cerastium nutans Raf. | 9 images |
| Cerastium pumilum Curtis | 422 images |
| Cerastium semidecandrum L. | 506 images |
| Cerastium tomentosum L. | 7079 images |
| Ceratophyllum demersum L. | 395 images |
| Cercidiphyllum japonicum Siebold & Zucc. ex J.J.Hoffm. & J.H.Schult.bis | 1451 images |
| Cercis canadensis L. | 7226 images |
| Chaenactis stevioides Hook. & Arn. | 69 images |
| Chaenomeles japonica (Thunb.) Lindl. ex Spach | 10572 images |
| Chaenomeles speciosa (Sweet) Nakai | 7918 images |
| Chaenorhinum minus (L.) Lange | 812 images |
| Chaerophyllum procumbens (L.) Crantz | 16 images |
| Chaerophyllum tainturieri Hook. & Arn. | 216 images |
| Chaerophyllum temulum L. | 6544 images |
| Chaiturus marrubiastrum (L.) Ehrh. ex Rchb. | 89 images |
| Chamaecrista fasciculata (Michx.) Greene | 973 images |
| Chamaecrista nictitans (L.) Moench | 265 images |
| Chamaecyparis pisifera (Siebold & Zucc.) Endl. | 1515 images |
| Chamaecyparis thyoides (L.) Britton, Sterns & Poggenb. | 109 images |
| Chamaedaphne calyculata (L.) Moench | 193 images |
| Chamaelirium luteum (L.) A.Gray | 48 images |
| Chamaemelum nobile (L.) All. | 2964 images |
| Chamaerhodos erecta (L.) Bunge | 1 images |
| Chasmanthium latifolium (Michx.) H.O.Yates | 595 images |
| Chelidonium majus L. | 27794 images |
| Chelone glabra L. | 546 images |
| Chelone obliqua L. | 302 images |
| Chenopodiastrum murale (L.) S.Fuentes, Uotila & Borsch | 1668 images |
| Chenopodium album L. | 15931 images |
| Chenopodium berlandieri Moq. | 50 images |
| Chenopodium betaceum Andrz. | 9 images |
| Chenopodium ficifolium Sm. | 2108 images |
| Chenopodium opulifolium Schrad. ex W.D.J.Koch & Ziz | 9 images |
| Chenopodium pratericola Rydb. | 26 images |
| Chenopodium standleyanum Aellen | 3 images |
| Chenopodium vulvaria L. | 1020 images |
| Chimaphila maculata (L.) Pursh | 855 images |
| Chimaphila umbellata (L.) W.P.C.Barton | 164 images |
| Chionanthus virginicus L. | 783 images |
| Chloris cucullata Bisch. | 7 images |
| Chloris gayana Kunth | 150 images |
| Chloris verticillata Nutt. | 33 images |
| Chloris virgata Sw. | 85 images |
| Chondrilla juncea L. | 2287 images |
| Chorispora tenella (Pall.) DC. | 225 images |
| Chromolaena laevigata (Lam.) R.M.King & H.Rob. | 27 images |
| Chrysogonum virginianum L. | 203 images |
| Chrysopsis mariana Elliott | 57 images |
| Chrysosplenium americanum Schwein. ex Hook. | 27 images |
| Cicer arietinum L. | 956 images |
| Cichorium intybus L. | 20545 images |
| Cicuta bulbifera L. | 42 images |
| Cicuta maculata L. | 380 images |
| Cinna arundinacea L. | 19 images |
| Circaea alpina L. | 283 images |
| Circaea canadensis (L.) Hill | 78 images |
| Cirsium altissimum (L.) Spreng. | 323 images |
| Cirsium arvense (L.) Scop. | 18178 images |
| Cirsium discolor (Muhl. ex Willd.) Spreng. | 263 images |
| Cirsium flodmanii Arthur | 9 images |
| Cirsium horridulum Michx. | 266 images |
| Cirsium muticum Michx. | 72 images |
| Cirsium palustre (L.) Scop. | 4714 images |
| Cirsium undulatum Spreng. | 128 images |
| Cirsium vulgare (Savi) Ten. | 22410 images |
| Citrullus colocynthis (L.) Schrad. | 509 images |
| Citrullus lanatus (Thunb.) Matsum. & Nakai | 2661 images |
| Citrus trifoliata L. | 2995 images |
| Cladanthus mixtus (L.) Chevall. | 438 images |
| Cladium mariscoides (Muhl.) Torr. | 4 images |
| Cladrastis kentukea (Dum.Cours.) Rudd | 452 images |
| Clarkia pulchella Pursh | 55 images |
| Clarkia purpurea (Curtis) A.Nelson & J.F.Macbr. | 12 images |
| Clarkia rhomboidea Douglas | 65 images |
| Claytonia caroliniana Michx. | 318 images |
| Claytonia virginica L. | 1245 images |
| Cleistesiopsis divaricata (L.) Pansarin & F.Barros | 4 images |
| Clematis occidentalis (Hornem.) DC. | 64 images |
| Clematis ochroleuca Aiton | 10 images |
| Clematis pitcheri Torr. & A.Gray | 4 images |
| Clematis recta L. | 987 images |
| Clematis terniflora DC. | 1187 images |
| Clematis viorna L. | 88 images |
| Clematis virginiana L. | 1136 images |
| Clematis vitalba L. | 21567 images |
| Clematis viticella L. | 6285 images |
| Cleome dodecandra L. | 157 images |
| Cleome gynandra L. | 507 images |
| Cleome houtteana Schltdl. | 2837 images |
| Cleome ornithopodioides L. | 12 images |
| Cleome spinosa Jacq. | 1305 images |
| Cleome viscosa L. | 551 images |
| Cleomella serrulata (Pursh) Roalson & J.C.Hall | 108 images |
| Clethra acuminata Michx. | 31 images |
| Clethra alnifolia L. | 1084 images |
| Clinopodium acinos (L.) Kuntze | 869 images |
| Clinopodium arkansanum (Nutt.) House | 1 images |
| Clinopodium glabellum (Michx.) Kuntze | 17 images |
| Clinopodium menthifolium (Host) Merino | 78 images |
| Clinopodium nepeta (L.) Kuntze | 7882 images |
| Clinopodium vulgare L. | 8905 images |
| Clintonia borealis (Aiton) Raf. | 826 images |
| Clintonia umbellulata (Michx.) Morong | 31 images |
| Clitoria mariana L. | 146 images |
| Cocculus carolinus (L.) DC. | 400 images |
| Coincya monensis (L.) Greuter & Burdet | 433 images |
| Coix lacryma-jobi L. | 384 images |
| Colchicum autumnale L. | 6745 images |
| Coleataenia anceps (Michx.) Soreng | 3 images |
| Collinsia parviflora Douglas ex Lindl. | 51 images |
| Collinsia verna Nutt. | 72 images |
| Collinsonia canadensis L. | 155 images |
| Collomia linearis Nutt. | 42 images |
| Colutea arborescens L. | 3963 images |
| Comandra umbellata (L.) Nutt. | 105 images |
| Comarum palustre L. | 1209 images |
| Commelina communis L. | 2525 images |
| Commelina diffusa Burm.f. | 684 images |
| Commelina erecta L. | 2059 images |
| Commelina virginica L. | 61 images |
| Comptonia peregrina (L.) Coult. | 255 images |
| Conium maculatum L. | 8412 images |
| Conoclinium coelestinum DC. | 1361 images |
| Conopholis americana (L.) Wallr. | 340 images |
| Conringia orientalis (L.) C.Presl | 4 images |
| Convallaria majalis L. | 7901 images |
| Convallaria pseudomajalis W.Bartram | 6 images |
| Convolvulus arvensis L. | 18714 images |
| Coptis trifolia (L.) Salisb. | 278 images |
| Corallorhiza maculata Raf. | 330 images |
| Corallorhiza odontorhiza (Willd.) Nutt. | 2 images |
| Corallorhiza striata Lindl. | 141 images |
| Corallorhiza trifida Châtel. | 206 images |
| Corallorhiza wisteriana Conrad | 34 images |
| Corchorus tridens L. | 32 images |
| Corema conradii (Torr.) Torr. ex Loudon | 1 images |
| Coreopsis auriculata L. | 149 images |
| Coreopsis grandiflora Hogg ex Sweet | 3019 images |
| Coreopsis lanceolata L. | 3275 images |
| Coreopsis major Walter | 142 images |
| Coreopsis palmata Nutt. | 71 images |
| Coreopsis pubescens Elliott | 24 images |
| Coreopsis rosea Nutt. | 16 images |
| Coreopsis tinctoria Nutt. | 3646 images |
| Coreopsis tripteris L. | 201 images |
| Coreopsis verticillata L. | 2305 images |
| Coriandrum sativum L. | 3562 images |
| Corispermum americanum (Nutt.) Nutt. | 2 images |
| Corispermum pallasii Steven | 119 images |
| Cornus alternifolia L.f. | 408 images |
| Cornus amomum Mill. | 747 images |
| Cornus canadensis L. | 1596 images |
| Cornus drummondii C.A.Mey. | 40 images |
| Cornus florida L. | 6334 images |
| Cornus foemina Mill. | 45 images |
| Cornus kousa Bürger ex Hance | 3908 images |
| Cornus mas L. | 13058 images |
| Cornus racemosa Lam. | 631 images |
| Cornus rugosa Lam. | 298 images |
| Cornus sanguinea L. | 31459 images |
| Cornus sericea L. | 8235 images |
| Coronilla varia L. | 11157 images |
| Cortaderia selloana (Schult. & Schult.f.) Asch. & Graebn. | 4788 images |
| Corydalis aurea Willd. | 106 images |
| Corydalis flavula (Raf.) DC. | 99 images |
| Corydalis incisa (Thunb.) Pers. | 17 images |
| Corydalis solida (L.) Clairv. | 5767 images |
| Corylus americana Walter | 84 images |
| Corylus cornuta Marshall | 2019 images |
| Corynephorus canescens (L.) P.Beauv. | 459 images |
| Coryphopteris simulata (Davenp.) S.E.Fawc. | 1 images |
| Cosmos bipinnatus Cav. | 15121 images |
| Cosmos parviflorus (Jacq.) Pers. | 45 images |
| Cosmos sulphureus Cav. | 4603 images |
| Cota tinctoria (L.) J.Gay | 2875 images |
| Cotinus coggygria Scop. | 15398 images |
| Cotoneaster acutifolius Turcz. | 1006 images |
| Cotoneaster adpressus Bois | 45 images |
| Cotoneaster cochleatus (Franch.) G.Klotz | 24 images |
| Cotoneaster divaricatus Rehder & E.H.Wilson | 712 images |
| Cotoneaster horizontalis Decne. | 6244 images |
| Cotoneaster microphyllus Wall. ex Lindl. | 707 images |
| Cotula australis Hook.f. | 268 images |
| Cotula coronopifolia L. | 575 images |
| Crassula aquatica (L.) Schönland | 9 images |
| Crataegus calpodendron (Ehrh.) Medik. | 10 images |
| Crataegus chrysocarpa Ashe | 17 images |
| Crataegus coccinea L. | 236 images |
| Crataegus coccinioides Ashe | 24 images |
| Crataegus collina Chapm. | 4 images |
| Crataegus crus-galli L. | 918 images |
| Crataegus douglasii Lindl. | 496 images |
| Crataegus flabellata (Bosc ex Spach) K.Koch | 2 images |
| Crataegus fluviatilis Sarg. | 2 images |
| Crataegus holmesiana Ashe | 28 images |
| Crataegus intricata Lange | 10 images |
| Crataegus irrasa Sarg. | 3 images |
| Crataegus macracantha Lodd. ex Loudon | 10 images |
| Crataegus macrosperma Ashe | 10 images |
| Crataegus magniflora Sarg. | 3 images |
| Crataegus mollis (Torr. & A.Gray) Scheele | 42 images |
| Crataegus monogyna Jacq. | 25904 images |
| Crataegus pennsylvanica Ashe | 6 images |
| Crataegus persimilis Sarg. | 588 images |
| Crataegus phaenopyrum (L.f.) Medik. | 254 images |
| Crataegus pruinosa (H.L.Wendl.) K.Koch | 9 images |
| Crataegus punctata Jacq. | 100 images |
| Crataegus scabrida Sarg. | 5 images |
| Crataegus submollis Sarg. | 285 images |
| Crataegus succulenta Schrad. ex Link | 15 images |
| Crataegus uniflora Münchh. | 17 images |
| Crataegus viridis L. | 36 images |
| Crepis biennis L. | 5293 images |
| Crepis capillaris (L.) Wallr. | 10491 images |
| Crepis foetida L. | 2351 images |
| Crepis nicaeensis Balb. | 51 images |
| Crepis pannonica (Jacq.) K.Koch | 2 images |
| Crepis pulchra L. | 1151 images |
| Crepis setosa Haller f. | 3006 images |
| Crepis tectorum L. | 470 images |
| Crepis vesicaria L. | 3474 images |
| Crocanthemum bicknellii (Fernald) Janch. | 4 images |
| Crocanthemum canadense (L.) Britton | 1 images |
| Crocus angustifolius Weston | 35 images |
| Crocus imperati Ten. | 56 images |
| Crocus sieberi J.Gay | 89 images |
| Crocus tommasinianus Herb. | 2397 images |
| Crotalaria sagittalis L. | 62 images |
| Crotalaria spectabilis Roth | 208 images |
| Croton capitatus Michx. | 236 images |
| Croton glandulosus L. | 96 images |
| Croton monanthogynus Michx. | 127 images |
| Cruciata laevipes Opiz | 5575 images |
| Cruciata pedemontana (Bellardi) Ehrend. | 137 images |
| Crupina vulgaris Pers. ex Cass. | 96 images |
| Cryptantha clevelandii Greene | 43 images |
| Cryptogramma acrostichoides R.Br. | 1 images |
| Cryptotaenia canadensis (L.) DC. | 282 images |
| Cucumis anguria L. | 212 images |
| Cucumis melo L. | 5413 images |
| Cucumis sativus L. | 5299 images |
| Cucurbita foetidissima Kunth | 291 images |
| Cucurbita maxima Duchesne | 5729 images |
| Cucurbita moschata Duchesne | 3344 images |
| Cucurbita pepo L. | 7822 images |
| Cullen americanum (L.) Rydb. | 5 images |
| Cuminum cyminum L. | 60 images |
| Cunila origanoides (L.) Britton | 52 images |
| Cuphea procumbens Ortega | 18 images |
| Cuphea viscosissima Jacq. | 73 images |
| Cuscuta approximata Bab. | 43 images |
| Cuscuta australis R.Br. | 3 images |
| Cuscuta campestris Yunck. | 705 images |
| Cuscuta cephalanthi Engelm. | 4 images |
| Cuscuta compacta Juss. ex Choisy | 1 images |
| Cuscuta epilinum Weihe | 15 images |
| Cuscuta epithymum (L.) L. | 1275 images |
| Cuscuta europaea L. | 331 images |
| Cuscuta glomerata Choisy | 2 images |
| Cuscuta gronovii Willd. ex Schult. | 4 images |
| Cuscuta indecora Choisy | 15 images |
| Cuscuta pentagona Engelm. | 12 images |
| Cuscuta polygonorum Engelm. | 2 images |
| Cyclachaena xanthiifolia (Nutt.) Fresen. | 125 images |
| Cyclospermum leptophyllum (Pers.) Sprague ex Britton & P.Wilson | 441 images |
| Cydonia oblonga Mill. | 10963 images |
| Cymbalaria muralis G.Gaertn., B.Mey. & Scherb. | 2479 images |
| Cymbalaria pallida (Ten.) Wettst. | 53 images |
| Cynanchum laeve (Michx.) Pers. | 237 images |
| Cynodon dactylon (L.) Pers. | 2905 images |
| Cynoglossum amabile Stapf & J.R.Drumm. | 1059 images |
| Cynoglossum microglochin Benth. | 15 images |
| Cynoglossum officinale L. | 3489 images |
| Cynoglossum wallichii G.Don | 8 images |
| Cynoglottis barrelieri (All.) Vural & Kit Tan | 37 images |
| Cynosurus cristatus L. | 849 images |
| Cynosurus echinatus L. | 674 images |
| Cyperus aggregatus (Willd.) Endl. | 60 images |
| Cyperus alternifolius L. | 2444 images |
| Cyperus bipartitus Torr. | 8 images |
| Cyperus brevifolioides Thieret & Delahouss. | 4 images |
| Cyperus compressus L. | 48 images |
| Cyperus difformis L. | 133 images |
| Cyperus eragrostis Lam. | 2853 images |
| Cyperus erythrorhizos Muhl. | 1 images |
| Cyperus esculentus L. | 1001 images |
| Cyperus flavescens L. | 69 images |
| Cyperus fuscus L. | 348 images |
| Cyperus hortensis (Salzm. ex Steud.) Dorr | 144 images |
| Cyperus iria L. | 57 images |
| Cyperus lupulinus (Biehler) Marcks | 2 images |
| Cyperus macrostachyos Lam. | 5 images |
| Cyperus microiria Steud. | 26 images |
| Cyperus ochraceus Vahl | 7 images |
| Cyperus odoratus L. | 131 images |
| Cyperus polystachyos Rottb. | 36 images |
| Cyperus pseudovegetus Steud. | 5 images |
| Cyperus rotundus L. | 1177 images |
| Cyperus serotinus Rottb. | 13 images |
| Cyperus squarrosus L. | 27 images |
| Cyperus strigosus L. | 385 images |
| Cyperus subsquarrosus (Muhl.) Bauters | 162 images |
| Cypripedium acaule Aiton | 951 images |
| Cypripedium candidum Muhl. ex Willd. | 44 images |
| Cypripedium parviflorum Salisb. | 316 images |
| Cypripedium reginae Walter | 221 images |
| Cyrtomium falcatum (L.f.) C.Presl | 481 images |
| Cyrtosia septentrionalis (Rchb.f.) Garay | 4 images |
| Cystopteris × tennesseensis Shaver | 13 images |
| Cystopteris bulbifera (L.) Bernh. | 98 images |
| Cystopteris fragilis (L.) Bernh. | 1301 images |
| Cystopteris protrusa (Weath.) Blasdell | 43 images |
| Cystopteris tenuis (Michx.) Desv. | 3 images |
| Cytisus scoparius (L.) Link | 12662 images |
| Cytisus villosus Pourr. | 979 images |
| Dactylis glomerata L. | 11240 images |
| Dactyloctenium aegyptium (L.) Willd. | 451 images |
| Dactyloctenium radulans (R.Br.) P.Beauv. | 262 images |
| Dactylorhiza viridis (L.) R.M.Bateman, Pridgeon & M.W.Chase | 928 images |
| Dalea candida Willd. | 18 images |
| Dalea leporina (Aiton) Bullock | 28 images |
| Dalea purpurea Vent. | 275 images |
| Dalea villosa (Nutt.) Spreng. | 3 images |
| Dalibarda repens L. | 31 images |
| Danthonia californica Bol. | 18 images |
| Danthonia compressa Austin | 4 images |
| Danthonia intermedia Vasey | 6 images |
| Daphne mezereum L. | 4650 images |
| Dasiphora fruticosa (L.) Rydb. | 7513 images |
| Dasistoma macrophylla (Nutt.) Raf. | 61 images |
| Dasypyrum villosum (L.) Borbás | 2 images |
| Datura innoxia Mill. | 1952 images |
| Datura metel L. | 671 images |
| Datura stramonium L. | 16041 images |
| Daucus carota L. | 28132 images |
| Decodon verticillatus (L.) Elliott | 62 images |
| Delphinium ajacis L. | 6731 images |
| Delphinium consolida L. | 2937 images |
| Delphinium exaltatum Aiton | 19 images |
| Delphinium tricorne Michx. | 219 images |
| Dennstaedtia punctilobula (Michx.) T.Moore | 4 images |
| Deparia acrostichoides (Sw.) M.Kato | 53 images |
| Deschampsia cespitosa (L.) P.Beauv. | 631 images |
| Deschampsia elongata (Hook.) Munro | 3 images |
| Descurainia pinnata (Walter) Britton | 165 images |
| Descurainia sophia (L.) Webb ex Prantl | 831 images |
| Desmanthus illinoensis (Michx.) MacMill. ex B.L.Rob. & Fernald | 147 images |
| Desmodium canadense (L.) DC. | 289 images |
| Desmodium canescens (L.) DC. | 8 images |
| Desmodium glabellum (Michx.) DC. | 7 images |
| Desmodium illinoense A.Gray | 2 images |
| Desmodium paniculatum (L.) DC. | 613 images |
| Deutzia crenata Siebold & Zucc. | 659 images |
| Dianthera americana L. | 196 images |
| Dianthus armeria L. | 2732 images |
| Dianthus barbatus L. | 11758 images |
| Dianthus carthusianorum L. | 6872 images |
| Dianthus deltoides L. | 4520 images |
| Dianthus plumarius L. | 1669 images |
| Diapensia lapponica L. | 43 images |
| Dicentra canadensis (Goldie) Walp. | 155 images |
| Dicentra cucullaria (L.) Bernh. | 664 images |
| Dicentra eximia (Ker Gawl.) Torr. | 115 images |
| Dichanthelium acuminatum (Sw.) Gould & C.A.Clark | 49 images |
| Dichanthelium clandestinum (L.) Gould | 235 images |
| Dichanthelium latifolium (L.) Harvill | 2 images |
| Dichanthelium oligosanthes (Schult.) Gould | 36 images |
| Dichanthelium sabulorum (Lam.) Gould & C.A.Clark | 1 images |
| Dichanthelium scribnerianum (Nash) J.R.Thomas | 2 images |
| Dichodon viscidum (M.Bieb.) Holub | 43 images |
| Dichondra carolinensis Michx. | 232 images |
| Dicliptera brachiata Spreng. | 74 images |
| Dictamnus albus L. | 2106 images |
| Diervilla lonicera Mill. | 737 images |
| Dieteria canescens (Pursh) Nutt. | 81 images |
| Digitalis grandiflora Mill. | 2872 images |
| Digitalis lanata Ehrh. | 244 images |
| Digitalis lutea L. | 3218 images |
| Digitalis purpurea L. | 22152 images |
| Digitaria ciliaris (Retz.) Koeler | 237 images |
| Digitaria filiformis (L.) Koeler | 7 images |
| Digitaria ischaemum (Schreb.) Muhl. | 53 images |
| Digitaria sanguinalis (L.) Scop. | 2664 images |
| Digitaria violascens Link | 12 images |
| Diodia virginiana L. | 428 images |
| Dionaea muscipula J.Ellis | 1843 images |
| Dioscorea polystachya Turcz. | 57 images |
| Dioscorea villosa L. | 314 images |
| Diospyros virginiana L. | 2722 images |
| Diplachne fusca (L.) P.Beauv. ex Roem. & Schult. | 44 images |
| Diplotaxis erucoides (L.) DC. | 7969 images |
| Diplotaxis muralis (L.) DC. | 953 images |
| Diplotaxis tenuifolia (L.) DC. | 6427 images |
| Dipsacus fullonum L. | 15286 images |
| Dipsacus laciniatus L. | 1103 images |
| Dipsacus sativus (L.) Honck. | 2968 images |
| Dirca palustris L. | 89 images |
| Distichlis spicata (L.) Greene | 97 images |
| Dittrichia graveolens (L.) Greuter | 1114 images |
| Doellingeria infirma Greene | 6 images |
| Doellingeria umbellata (Mill.) Nees | 561 images |
| Draba glabella Pursh | 7 images |
| Draba incana L. | 28 images |
| Draba nemorosa L. | 84 images |
| Draba verna L. | 2811 images |
| Dracocephalum moldavica L. | 311 images |
| Dracocephalum parviflorum Nutt. | 39 images |
| Dracocephalum thymiflorum L. | 38 images |
| Drosera anglica Huds. | 317 images |
| Drosera capillaris Poir. | 142 images |
| Drosera filiformis Raf. | 77 images |
| Drosera intermedia Hayne | 453 images |
| Drosera linearis Goldie | 17 images |
| Drosera rotundifolia L. | 1653 images |
| Drymocallis arguta (Pursh) Rydb. | 14 images |
| Dryopteris × boottii (Tuck.) Underw. | 4 images |
| Dryopteris × uliginosa (A.Braun ex Döll) Kuntze ex Druce | 1 images |
| Dryopteris campyloptera Clarkson | 1 images |
| Dryopteris carthusiana (Vill.) H.P.Fuchs | 1008 images |
| Dryopteris celsa (W.Palmer) Knowlt., T.S.Palmer & Pollard ex Small | 7 images |
| Dryopteris clintoniana (D.C.Eaton) Dowell | 7 images |
| Dryopteris cristata (L.) A.Gray | 333 images |
| Dryopteris expansa (C.Presl) Fraser-Jenk. & Jermy | 125 images |
| Dryopteris filix-mas (L.) Schott | 7307 images |
| Dryopteris fragrans (L.) Schott | 31 images |
| Dryopteris goldieana (Hook. ex Goldie) A.Gray | 16 images |
| Dryopteris intermedia A.Gray | 12 images |
| Dryopteris marginalis (L.) A.Gray | 5 images |
| Dulichium arundinaceum (L.) Britton | 49 images |
| Dysphania ambrosioides (L.) Mosyakin & Clemants | 1454 images |
| Dysphania anthelmintica (L.) Mosyakin & Clemants | 1 images |
| Dysphania atriplicifolia (Spreng.) G.Kadereit, Sukhor. & Uotila | 62 images |
| Dysphania botrys (L.) Mosyakin & Clemants | 136 images |
| Dysphania incisa (Poir.) ined. | 1 images |
| Dysphania multifida (L.) Mosyakin & Clemants | 64 images |
| Dysphania pumilio (R.Br.) Mosyakin & Clemants | 315 images |
| Dyssodia papposa (Vent.) Hitchc. | 32 images |
| Ecballium elaterium (L.) A.Rich. | 5851 images |
| Echinacea pallida (Nutt.) Nutt. | 930 images |
| Echinacea purpurea (L.) Moench | 7500 images |
| Echinochloa colonum (L.) Link | 242 images |
| Echinochloa crus-galli (L.) P.Beauv. | 3215 images |
| Echinochloa frumentacea Link | 17 images |
| Echinochloa muricata (P.Beauv.) Fernald | 54 images |
| Echinochloa walteri (Pursh) A.Heller | 1 images |
| Echinocystis lobata (Michx.) Torr. & A.Gray | 926 images |
| Echinodorus berteroi (Spreng.) Fassett | 13 images |
| Echinops ritro L. | 5303 images |
| Echinops sphaerocephalus L. | 3490 images |
| Echium creticum L. | 1034 images |
| Echium plantagineum L. | 8093 images |
| Echium vulgare L. | 36507 images |
| Eclipta prostrata (L.) L. | 1458 images |
| Elaeagnus angustifolia L. | 5520 images |
| Elaeagnus commutata Bernh. ex Rydb. | 262 images |
| Elaeagnus multiflora Thunb. | 198 images |
| Elaeagnus pungens Thunb. | 5374 images |
| Elaeagnus umbellata Thunb. | 2903 images |
| Elatine triandra Schkuhr | 43 images |
| Eleocharis acicularis (L.) Roem. & Schult. | 61 images |
| Eleocharis atropurpurea (Retz.) J.Presl & C.Presl | 4 images |
| Eleocharis compressa Sull. | 16 images |
| Eleocharis erythropoda Steud. | 7 images |
| Eleocharis exigua (Kunth) Roem. & Schult. | 2 images |
| Eleocharis flavescens (Poir.) Urb. | 8 images |
| Eleocharis geniculata (L.) Roem. & Schult. | 3 images |
| Eleocharis obtusa (Willd.) Schult. | 40 images |
| Eleocharis ovata (Roth) Roem. & Schult. | 45 images |
| Eleocharis palustris (L.) Roem. & Schult. | 732 images |
| Eleocharis parvula (Roem. & Schult.) Link ex Bluff, Nees & Schauer | 41 images |
| Eleocharis quinqueflora (Hartmann) O.Schwarz | 55 images |
| Eleocharis tortilis (Link) Schult. | 1 images |
| Eleocharis tuberculosa (Michx.) Roem. & Schult. | 1 images |
| Eleocharis uniglumis (Link) Schult. | 30 images |
| Elephantopus carolinianus Raeusch. | 60 images |
| Eleusine indica (L.) Gaertn. | 1068 images |
| Eleusine tristachya (Lam.) Lam. | 162 images |
| Eleutherococcus sieboldianus (Makino) Koidz. | 16 images |
| Ellisia nyctelea (L.) L. | 58 images |
| Elodea canadensis Michx. | 258 images |
| Elodea densa (Planch.) Casp. | 126 images |
| Elodea nuttallii (Planch.) H.St.John | 97 images |
| Elsholtzia ciliata (Thunb.) Hyl. | 51 images |
| Elymus canadensis L. | 157 images |
| Elymus glaucus Buckley | 13 images |
| Elymus hystrix L. | 70 images |
| Elymus repens (L.) Gould | 739 images |
| Elymus riparius Wiegand | 5 images |
| Elymus villosus Muhl. ex Willd. | 7 images |
| Elymus violaceus (Hornem.) J.Feilberg | 8 images |
| Elymus virginicus L. | 67 images |
| Empetrum nigrum L. | 1454 images |
| Enemion biternatum Raf. | 8 images |
| Epifagus virginiana (L.) Barton | 115 images |
| Epigaea repens L. | 194 images |
| Epilobium anagallidifolium Lam. | 207 images |
| Epilobium angustifolium L. | 19719 images |
| Epilobium ciliatum Raf. | 4685 images |
| Epilobium coloratum Biehler | 85 images |
| Epilobium hirsutum L. | 15275 images |
| Epilobium hornemannii Rchb. | 25 images |
| Epilobium lactiflorum Hausskn. | 18 images |
| Epilobium leptophyllum Raf. | 9 images |
| Epilobium montanum L. | 3715 images |
| Epilobium obscurum Schreb. | 75 images |
| Epilobium palustre L. | 516 images |
| Epilobium parviflorum Schreb. | 4805 images |
| Epipactis atrorubens (Hoffm.) Besser | 2602 images |
| Epipactis helleborine (L.) Crantz | 7322 images |
| Epipactis palustris (L.) Crantz | 1319 images |
| Equisetum × ferrissii Clute | 6 images |
| Equisetum × litorale Kühlew. ex Rupr. | 16 images |
| Equisetum arvense L. | 6630 images |
| Equisetum fluviatile L. | 897 images |
| Equisetum laevigatum A.Braun & Engelm. | 78 images |
| Equisetum palustre L. | 1036 images |
| Equisetum pratense Ehrh. | 442 images |
| Equisetum scirpoides Michx. | 82 images |
| Equisetum sylvaticum L. | 2624 images |
| Equisetum variegatum Schleich. ex F.Weber & D.Mohr | 112 images |
| Eragrostis barrelieri Daveau | 68 images |
| Eragrostis cilianensis (All.) Vignolo ex Janch. | 183 images |
| Eragrostis ciliaris (L.) R.Br. | 8 images |
| Eragrostis cumingii Steud. | 7 images |
| Eragrostis curvula (Schrad.) Nees | 97 images |
| Eragrostis hypnoides (Lam.) Britton, Sterns & Poggenb. | 5 images |
| Eragrostis mexicana (Hornem.) Link | 28 images |
| Eragrostis minor Host | 345 images |
| Eragrostis multicaulis Steud. | 6 images |
| Eragrostis pectinacea (Michx.) Nees | 28 images |
| Eragrostis pilosa (L.) P.Beauv. | 69 images |
| Eragrostis spectabilis (Pursh) Steud. | 206 images |
| Eranthis hyemalis (L.) Salisb. | 4253 images |
| Erechtites hieraciifolius (L.) Raf. ex DC. | 1995 images |
| Eremochloa ophiuroides (Munro) Hack. | 2 images |
| Eremopyrum bonaepartis (Spreng.) Nevski | 2 images |
| Eremopyrum triticeum (Gaertn.) Nevski | 10 images |
| Erianthus alopecuroides (L.) Elliott | 24 images |
| Erianthus giganteus (Walter) P.Beauv. | 4 images |
| Erica cinerea L. | 5764 images |
| Erica tetralix L. | 1343 images |
| Erica vagans L. | 2464 images |
| Erigenia bulbosa (Michx.) Nutt. | 72 images |
| Erigeron annuus (L.) Desf | 846 images |
| Erigeron canadensis L. | 15291 images |
| Erigeron divaricatus Michx. | 28 images |
| Erigeron philadelphicus L. | 3534 images |
| Erigeron pulchellus Michx. | 255 images |
| Erigeron strigosus Muhl. ex Willd. | 6027 images |
| Eriocaulon aquaticum (Hill) Druce | 40 images |
| Eriocaulon compressum Lam. | 1 images |
| Eriocaulon decangulare L. | 9 images |
| Eriocaulon parkeri B.L.Rob. | 1 images |
| Eriochloa villosa (Thunb.) Kunth | 6 images |
| Eriogonum allenii S.Watson | 9 images |
| Eriophorum angustifolium Honck. | 2617 images |
| Eriophorum vaginatum L. | 935 images |
| Eriophorum virginicum L. | 37 images |
| Eriophorum viridicarinatum (Engelm.) Fernald | 2 images |
| Erodium botrys (Cav.) Bertol. | 572 images |
| Erodium ciconium (L.) L'Hér. | 2318 images |
| Erodium cicutarium (L.) L'Hér. | 13488 images |
| Erodium malacoides (L.) L'Hér. | 4257 images |
| Erodium moschatum (L.) L'Hér. | 4850 images |
| Eruca vesicaria (L.) Cav. | 4280 images |
| Erucastrum gallicum (Willd.) O.E.Schulz | 331 images |
| Eryngium aquaticum L. | 20 images |
| Eryngium campestre L. | 5960 images |
| Eryngium maritimum L. | 4516 images |
| Eryngium planum L. | 2371 images |
| Eryngium yuccifolium Michx. | 505 images |
| Erysimum asperum (Nutt.) DC. | 117 images |
| Erysimum capitatum (Douglas) Greene | 15 images |
| Erysimum cheiranthoides L. | 1250 images |
| Erysimum repandum L. | 54 images |
| Erysimum virgatum Roth | 121 images |
| Erythranthe guttata (DC.) G.L.Nesom | 901 images |
| Erythranthe moschata (Douglas ex Lindl.) G.L.Nesom | 19 images |
| Erythronium albidum Nutt. | 209 images |
| Erythronium americanum Ker Gawl. | 1440 images |
| Erythronium rostratum W.Wolf | 13 images |
| Erythronium umbilicatum C.R.Parks & Hardin | 8 images |
| Eschscholzia californica Cham. | 15099 images |
| Euclidium syriacum (L.) W.T.Aiton | 3 images |
| Eucommia ulmoides Oliv. | 148 images |
| Euonymus alatus (Thunb.) Siebold | 3653 images |
| Euonymus americanus L. | 476 images |
| Euonymus atropurpureus Jacq. | 134 images |
| Euonymus europaeus L. | 22192 images |
| Euonymus fortunei (Turcz.) Hand.-Mazz. | 7053 images |
| Eupatorium album L. | 7 images |
| Eupatorium altissimum L. | 138 images |
| Eupatorium cannabinum L. | 23492 images |
| Eupatorium capillifolium (Lam.) Small ex Porter & Britton | 631 images |
| Eupatorium hyssopifolium L. | 75 images |
| Eupatorium perfoliatum L. | 1039 images |
| Eupatorium pilosum Walter | 8 images |
| Eupatorium resinosum Torr. ex DC. | 5 images |
| Eupatorium rotundifolium L. | 38 images |
| Eupatorium serotinum Michx. | 1158 images |
| Eupatorium sessilifolium L. | 9 images |
| Euphorbia agraria M.Bieb. | 7 images |
| Euphorbia corollata L. | 234 images |
| Euphorbia cyparissias L. | 16939 images |
| Euphorbia davidii Subils | 58 images |
| Euphorbia dentata Michx. | 28 images |
| Euphorbia epithymoides L. | 863 images |
| Euphorbia exigua L. | 634 images |
| Euphorbia falcata L. | 190 images |
| Euphorbia glyptosperma Engelm. | 36 images |
| Euphorbia helioscopia L. | 9026 images |
| Euphorbia heterophylla L. | 1171 images |
| Euphorbia hirta L. | 1317 images |
| Euphorbia hyssopifolia L. | 151 images |
| Euphorbia lathyris L. | 9721 images |
| Euphorbia lucida Waldst. & Kit. | 81 images |
| Euphorbia maculata L. | 979 images |
| Euphorbia marginata Pursh | 1621 images |
| Euphorbia nutans Lag. | 424 images |
| Euphorbia ophthalmica Pers. | 11 images |
| Euphorbia peplus L. | 7453 images |
| Euphorbia platyphyllos L. | 601 images |
| Euphorbia polygonifolia L. | 43 images |
| Euphorbia prostrata Aiton | 2304 images |
| Euphorbia pubentissima Michx. | 10 images |
| Euphorbia saratoi Ardoino | 1 images |
| Euphorbia serpens Kunth | 603 images |
| Euphorbia virgata Waldst. & Kit. | 33 images |
| Euphrasia arctica Lange ex Rostrup | 1 images |
| Euphrasia micrantha Rchb. | 41 images |
| Euphrasia nemorosa (Pers.) Wallr. | 417 images |
| Euphrasia stricta J.P.Wolff ex J.F.Lehm. | 40 images |
| Euphrasia tetraquetra (Bréb.) Arrond. | 42 images |
| Euploca tenella (Torr.) Feuillet & Halse | 41 images |
| Eurybia × herveyi (A.Gray) G.L.Nesom | 1 images |
| Eurybia divaricata (L.) G.L.Nesom | 636 images |
| Eurybia macrophylla (L.) Cass. | 1737 images |
| Eurybia radula (Aiton) G.L.Nesom | 3 images |
| Eurybia schreberi (Nees) Nees | 24 images |
| Eustachys petraea (Sw.) Desv. | 3 images |
| Eustachys retusa (Lag.) Kunth | 5 images |
| Euthamia caroliniana (L.) Greene ex Porter & Britton | 1 images |
| Euthamia graminifolia (L.) Nutt. | 870 images |
| Euthamia gymnospermoides Greene | 17 images |
| Eutrochium dubium (Willd. ex Poir.) E.E.Lamont | 1 images |
| Eutrochium fistulosum (Barratt) E.E.Lamont | 509 images |
| Eutrochium maculatum (L.) E.E.Lamont | 1748 images |
| Eutrochium purpureum (L.) E.E.Lamont | 298 images |
| Eutrochium steelei (E.E.Lamont) E.E.Lamont | 1 images |
| Exochorda racemosa (Fortune ex Lindl.) Rehder | 16 images |
| Fagopyrum esculentum Moench | 6660 images |
| Fagopyrum tataricum (L.) Gaertn. | 226 images |
| Fagus grandifolia Ehrh. | 2633 images |
| Fagus sylvatica L. | 31728 images |
| Falcaria vulgaris Bernh. | 1128 images |
| Fallopia baldschuanica (Regel) Holub | 1456 images |
| Fallopia convolvulus (L.) Á.Löve | 1668 images |
| Fallopia dumetorum (L.) Holub | 1107 images |
| Fallopia scandens (L.) Holub | 28 images |
| Fatoua villosa (Thunb.) Nakai | 380 images |
| Festuca ambigua Le Gall | 161 images |
| Festuca bromoides L. | 216 images |
| Festuca filiformis Pourr. | 187 images |
| Festuca heterophylla Lam. | 192 images |
| Festuca microstachys Nutt. | 18 images |
| Festuca myuros L. | 350 images |
| Festuca occidentalis Hook. | 7 images |
| Festuca octoflora Walter | 10 images |
| Festuca ovina L. | 261 images |
| Festuca rubra L. | 418 images |
| Festuca trachyphylla (Hack.) Hack. | 20 images |
| Festuca valesiaca Schleich. ex Gaudin | 32 images |
| Ficus carica L. | 16619 images |
| Filago arvensis L. | 228 images |
| Filago germanica (L.) Huds. | 241 images |
| Filipendula rubra (Hill) B.L.Rob. | 362 images |
| Filipendula ulmaria (L.) Maxim. | 14143 images |
| Filipendula vulgaris Moench | 4077 images |
| Fimbristylis autumnalis (L.) Roem. & Schult. | 287 images |
| Fimbristylis dichotoma (L.) Vahl | 83 images |
| Fimbristylis squarrosa Vahl | 3 images |
| Flaveria bidentis (L.) Kuntze | 31 images |
| Flaveria trinervia (Spreng.) C.Mohr | 78 images |
| Fleischmannia incarnata (Walter) R.M.King & H.Rob. | 15 images |
| Floerkea proserpinacoides Willd. | 46 images |
| Foeniculum vulgare Mill. | 12259 images |
| Forestiera acuminata (Michx.) Poir. | 18 images |
| Forsythia suspensa (Thunb.) Vahl | 5143 images |
| Forsythia viridissima Lindl. | 3526 images |
| Fragaria × ananassa (Duchesne ex Weston) Duchesne ex Rozier | 4613 images |
| Fragaria vesca L. | 12278 images |
| Fragaria virginiana Mill. | 465 images |
| Frangula alnus Mill. | 7047 images |
| Frangula caroliniana (Walter) A.Gray | 128 images |
| Frankenia pulverulenta L. | 151 images |
| Frasera caroliniensis Walter | 58 images |
| Fraxinus americana L. | 5492 images |
| Fraxinus excelsior L. | 26560 images |
| Fraxinus nigra Marshall | 30 images |
| Fraxinus pennsylvanica Marshall | 2052 images |
| Fraxinus profunda (Bush) Bush | 23 images |
| Fraxinus quadrangulata Michx. | 46 images |
| Froelichia floridana (Nutt.) Moq. | 60 images |
| Froelichia gracilis (Hook.) Moq. | 35 images |
| Fuirena pumila (Torr.) Spreng. | 1 images |
| Fuirena squarrosa Michx. | 1 images |
| Fumaria officinalis L. | 7823 images |
| Gagea fragifera (Vill.) E.Bayer & G.López | 355 images |
| Gaillardia aristata Pursh | 3105 images |
| Gaillardia pulchella Foug. | 3636 images |
| Galactia volubilis (L.) Britton | 5 images |
| Galanthus elwesii Hook.f. | 453 images |
| Galanthus nivalis L. | 5158 images |
| Galax urceolata (Poir.) Brummitt | 136 images |
| Galearis rotundifolia (Banks ex Pursh) R.M.Bateman | 6 images |
| Galearis spectabilis (L.) Raf. | 163 images |
| Galega officinalis L. | 2852 images |
| Galeopsis angustifolia Ehrh. ex Hoffm. | 1021 images |
| Galeopsis bifida Boenn. | 727 images |
| Galeopsis ladanum L. | 782 images |
| Galeopsis tetrahit L. | 10160 images |
| Galinsoga parviflora Cav. | 3687 images |
| Galinsoga quadriradiata Ruiz & Pav. | 4669 images |
| Galium × pomeranicum Retz. | 233 images |
| Galium album Mill. | 5422 images |
| Galium aparine L. | 13646 images |
| Galium asprellum Michx. | 16 images |
| Galium boreale L. | 1102 images |
| Galium circaezans Michx. | 81 images |
| Galium divaricatum Pourr. ex Lam. | 23 images |
| Galium kamtschaticum Steller ex Schult. & Schult.f. | 3 images |
| Galium labradoricum (Wiegand) Wiegand | 1 images |
| Galium mollugo L. | 10041 images |
| Galium obtusum Bigelow | 8 images |
| Galium odoratum (L.) Scop. | 7767 images |
| Galium palustre L. | 1942 images |
| Galium pilosum Aiton | 9 images |
| Galium pumilum Murray | 500 images |
| Galium sylvaticum L. | 1608 images |
| Galium tinctorium L. | 1 images |
| Galium tricornutum Dandy | 333 images |
| Galium trifidum L. | 42 images |
| Galium triflorum Michx. | 259 images |
| Galium verum L. | 11766 images |
| Gamochaeta pensylvanica (Willd.) Cabrera | 88 images |
| Gamochaeta purpurea (L.) Cabrera | 111 images |
| Gastridium phleoides (Nees & Meyen) C.E.Hubb. | 1 images |
| Gaultheria hispidula (L.) Muhl. ex Bigelow | 82 images |
| Gaultheria procumbens L. | 1405 images |
| Gaylussacia baccata (Wangenh.) K.Koch | 71 images |
| Gaylussacia bigeloviana (Fernald) Sorrie & Weakley | 3 images |
| Gaylussacia brachycera (Michx.) Torr. & A.Gray | 2 images |
| Genista tinctoria L. | 2682 images |
| Gentiana alba Muhl. ex J.McNab | 10 images |
| Gentiana andrewsii Griseb. | 161 images |
| Gentiana autumnalis L. | 4 images |
| Gentiana clausa Raf. | 39 images |
| Gentiana cruciata L. | 1780 images |
| Gentiana linearis Froel. | 104 images |
| Gentiana puberulenta J.S.Pringle | 2 images |
| Gentiana saponaria L. | 8 images |
| Gentiana villosa L. | 16 images |
| Gentianella amarella (L.) Börner | 174 images |
| Gentianella quinquefolia (L.) Small | 22 images |
| Gentianopsis crinita (Froel.) Ma | 64 images |
| Gentianopsis virgata (Raf.) Holub | 14 images |
| Geocaulon lividum (Richardson) Fernald | 15 images |
| Geranium bicknellii Britton | 35 images |
| Geranium carolinianum L. | 1378 images |
| Geranium columbinum L. | 1497 images |
| Geranium dissectum L. | 6475 images |
| Geranium ibericum Cav. | 649 images |
| Geranium maculatum L. | 1504 images |
| Geranium molle L. | 9052 images |
| Geranium pratense L. | 9323 images |
| Geranium pusillum L. | 9415 images |
| Geranium pyrenaicum Burm.f. | 8705 images |
| Geranium robertianum L. | 24376 images |
| Geranium rotundifolium L. | 4870 images |
| Geranium sanguineum L. | 10367 images |
| Geranium sibiricum L. | 615 images |
| Geranium solanderi Carolin | 9 images |
| Geranium thunbergii Siebold & Zucc. | 20 images |
| Geranium versicolor L. | 589 images |
| Geum aleppicum Jacq. | 287 images |
| Geum canadense Jacq. | 118 images |
| Geum laciniatum Murray | 690 images |
| Geum macrophyllum Willd. | 4191 images |
| Geum rivale L. | 4157 images |
| Geum triflorum Pursh | 111 images |
| Geum urbanum L. | 15752 images |
| Geum vernum (Raf.) Torr. & A.Gray | 2 images |
| Geum virginianum L. | 13 images |
| Gilia achilleifolia Benth. | 68 images |
| Gilia capitata Sims | 587 images |
| Gilia tricolor Benth. | 417 images |
| Gillenia stipulata (Muhl. ex Willd.) Nutt. | 6 images |
| Gillenia trifoliata (L.) Moench | 156 images |
| Glaucium corniculatum (L.) Curtis | 128 images |
| Glaucium flavum Crantz | 5939 images |
| Glebionis coronaria (L.) Cass. ex Spach | 6088 images |
| Glebionis segetum (L.) Fourr. | 5226 images |
| Glechoma hederacea L. | 27249 images |
| Gleditsia aquatica Marshall | 75 images |
| Gleditsia triacanthos L. | 12599 images |
| Glyceria canadensis (Michx.) Trin. | 17 images |
| Glyceria declinata Bréb. | 31 images |
| Glyceria fluitans (L.) R.Br. | 229 images |
| Glyceria grandis S.Watson | 1 images |
| Glyceria maxima (Hartm.) Holmb. | 447 images |
| Glyceria obtusa (Muhl.) Trin. | 1 images |
| Glyceria septentrionalis Hitchc. | 2 images |
| Glyceria striata (Lam.) Hitchc. | 49 images |
| Glycine max (L.) Merr. | 2583 images |
| Glycyrrhiza lepidota Pursh | 87 images |
| Gnaphalium uliginosum L. | 1301 images |
| Gomphrena globosa L. | 3277 images |
| Gomphrena martiana Gillies ex Moq. | 3 images |
| Gonolobus suberosus (L.) R.Br. | 3 images |
| Goodyera oblongifolia Raf. | 209 images |
| Goodyera pubescens (Willd.) R.Br. | 347 images |
| Goodyera repens (L.) R.Br. | 401 images |
| Goodyera tesselata G.Lodd. | 32 images |
| Gossypium hirsutum L. | 612 images |
| Gratiola lutea Raf. | 10 images |
| Gratiola neglecta Torr. | 21 images |
| Gratiola virginiana L. | 9 images |
| Grindelia ciliata (Nutt.) Spreng. | 11 images |
| Grindelia hirsutula Hook. & Arn. | 131 images |
| Grindelia lanceolata Nutt. | 42 images |
| Grindelia squarrosa (Pursh) Dunal | 373 images |
| Guizotia abyssinica (L.f.) Cass. | 1082 images |
| Gutierrezia sarothrae (Pursh) Britton & Rusby | 94 images |
| Gymnadenia conopsea (L.) R.Br. | 6550 images |
| Gymnocarpium dryopteris (L.) Newman | 767 images |
| Gymnocarpium robertianum (Hoffm.) Newman | 315 images |
| Gymnocladus dioicus (L.) K.Koch | 687 images |
| Gypsophila acutifolia Steven ex Spreng. | 13 images |
| Gypsophila elegans M.Bieb. | 1339 images |
| Gypsophila paniculata L. | 1455 images |
| Gypsophila pilosa Huds. | 41 images |
| Gypsophila scorzonerifolia Ser. | 7 images |
| Gypsophila vaccaria (L.) Sm. | 1595 images |
| Hackelia deflexa (Wahlenb.) Opiz | 23 images |
| Hackelia floribunda (Lehm.) I.M.Johnst. | 21 images |
| Hackelia virginiana (L.) I.M.Johnst. | 180 images |
| Halerpestes cymbalaria (Pursh) Greene | 19 images |
| Halesia carolina L. | 544 images |
| Hamamelis virginiana L. | 3330 images |
| Harperella nodosa (Rose) Rose | 5 images |
| Hasteola suaveolens (L.) Pojark. | 32 images |
| Hedeoma hispida Pursh | 4 images |
| Hedeoma pulegioides (L.) Pers. | 24 images |
| Hedera helix L. | 25080 images |
| Hedlundia hybrida (L.) Sennikov & Kurtto | 57 images |
| Helanthium tenellum (Mart. ex Schult.f.) J.G.Sm. | 3 images |
| Helenium amarum (Raf.) H.Rock | 429 images |
| Helenium autumnale L. | 1871 images |
| Helenium flexuosum Raf. | 73 images |
| Helianthus × laetiflorus Pers. | 2422 images |
| Helianthus angustifolius L. | 155 images |
| Helianthus annuus L. | 16300 images |
| Helianthus atrorubens L. | 20 images |
| Helianthus debilis Nutt. | 556 images |
| Helianthus decapetalus L. | 391 images |
| Helianthus divaricatus L. | 1304 images |
| Helianthus giganteus L. | 1528 images |
| Helianthus grosseserratus M.Martens | 57 images |
| Helianthus hirsutus Raf. | 84 images |
| Helianthus maximiliani Schrad. | 556 images |
| Helianthus microcephalus Torr. & A.Gray | 5 images |
| Helianthus mollis Buc'hoz | 111 images |
| Helianthus occidentalis Riddell | 43 images |
| Helianthus pauciflorus Nutt. | 202 images |
| Helianthus petiolaris Nutt. | 803 images |
| Helianthus salicifolius A.Dietr. | 243 images |
| Helianthus strumosus L. | 86 images |
| Helianthus tuberosus L. | 8734 images |
| Heliomeris multiflora Nutt. | 65 images |
| Heliopsis helianthoides (L.) Sweet | 2908 images |
| Heliotropium amplexicaule Vahl | 381 images |
| Heliotropium curassavicum L. | 713 images |
| Heliotropium europaeum L. | 5707 images |
| Heliotropium indicum L. | 669 images |
| Heliotropium ramosissimum (Lehm.) Sieber ex DC. | 261 images |
| Heliotropium supinum L. | 167 images |
| Helleborus niger L. | 5251 images |
| Helleborus viridis L. | 5487 images |
| Helminthotheca echioides (L.) Holub | 8591 images |
| Helonias bullata L. | 33 images |
| Helosciadium nodiflorum (L.) W.D.J.Koch | 1686 images |
| Helosciadium repens (Jacq.) W.D.J.Koch | 77 images |
| Hemarthria altissima (Poir.) Stapf & C.E.Hubb. | 18 images |
| Hemerocallis fulva (L.) L. | 11502 images |
| Hemerocallis lilioasphodelus L. | 6584 images |
| Hemionitis atropurpurea (L.) Christenh. | 50 images |
| Hemionitis bradburyi (Hook.) Christenh. | 3 images |
| Hemionitis eatonii (Baker) Christenh. | 3 images |
| Hemionitis glabella (Mett.) Christenh. | 13 images |
| Hemionitis lanosa (Michx.) Christenh. | 19 images |
| Hepatica acutiloba DC. | 14 images |
| Hepatica americana (DC.) Ker Gawl. | 7 images |
| Heracleum mantegazzianum Sommier & Levier | 3182 images |
| Heracleum maximum W.Bartram | 776 images |
| Heracleum sibiricum L. | 4045 images |
| Heracleum sphondylium L. | 22836 images |
| Herniaria cinerea DC. | 30 images |
| Herniaria glabra L. | 823 images |
| Herniaria hirsuta L. | 381 images |
| Hesperis matronalis L. | 8902 images |
| Heteranthera dubia (Jacq.) MacMill. | 24 images |
| Heteranthera reniformis Ruiz & Pav. | 123 images |
| Heterotheca camporum (Greene) Shinners | 32 images |
| Heterotheca subaxillaris (Lam.) Britton & Rusby | 335 images |
| Heterotheca villosa (Pursh) Shinners | 188 images |
| Heuchera americana L. | 390 images |
| Heuchera longiflora Rydb. | 4 images |
| Heuchera pubescens Pursh | 5 images |
| Heuchera richardsonii R.Br. | 53 images |
| Heuchera villosa Michx. | 294 images |
| Hexasepalum teres (Walter) J.H.Kirkbr. | 125 images |
| Hibiscus laevis All. | 128 images |
| Hibiscus moscheutos L. | 6110 images |
| Hibiscus syriacus L. | 29396 images |
| Hibiscus trionum L. | 1255 images |
| Hieracium lachenalii Suter | 627 images |
| Hieracium maculatum Schrank | 797 images |
| Hieracium murorum L. | 4324 images |
| Hieracium paniculatum L. | 17 images |
| Hieracium sabaudum L. | 1115 images |
| Hieracium scabrum Michx. | 20 images |
| Hieracium umbellatum L. | 2319 images |
| Hieracium venosum L. | 166 images |
| Hippuris vulgaris L. | 565 images |
| Holcus lanatus L. | 6666 images |
| Holcus mollis L. | 220 images |
| Holosteum umbellatum L. | 148 images |
| Homalosorus pycnocarpos (Spreng.) Pic.Serm. | 4 images |
| Honckenya peploides (L.) Ehrh. | 1549 images |
| Hordeum brachyantherum Nevski | 21 images |
| Hordeum jubatum L. | 572 images |
| Hordeum marinum Huds. | 317 images |
| Hordeum murinum L. | 7575 images |
| Hordeum pusillum Nutt. | 57 images |
| Hordeum vulgare L. | 9031 images |
| Hosta lancifolia (Thunb.) Engl. | 164 images |
| Hosta plantaginea (Lam.) Asch. | 10886 images |
| Hosta ventricosa Stearn | 86 images |
| Hottonia inflata Elliott | 5 images |
| Houstonia caerulea L. | 554 images |
| Houstonia longifolia Gaertn. | 49 images |
| Houstonia purpurea L. | 126 images |
| Houstonia pusilla Schoepf | 259 images |
| Houstonia serpyllifolia Michx. | 47 images |
| Houttuynia cordata Thunb. | 2462 images |
| Hudsonia ericoides L. | 10 images |
| Hudsonia tomentosa Nutt. | 22 images |
| Humulus lupulus L. | 11075 images |
| Humulus scandens (Lour.) Merr. | 94 images |
| Huperzia selago (L.) Bernh. ex Schrank & Mart. | 509 images |
| Hyacinthoides hispanica (Mill.) Rothm. | 5068 images |
| Hyacinthoides non-scripta (L.) Chouard ex Rothm. | 10655 images |
| Hyacinthus orientalis L. | 10498 images |
| Hybanthus concolor (T.F.Forst.) Spreng. | 1 images |
| Hydrangea arborescens L. | 6235 images |
| Hydrangea barbara (L.) Bernd Schulz | 47 images |
| Hydrangea cinerea Small | 29 images |
| Hydrangea heteromalla D.Don | 58 images |
| Hydrangea paniculata Siebold | 7996 images |
| Hydrangea quercifolia W.Bartram | 2407 images |
| Hydrastis canadensis L. | 166 images |
| Hydrilla verticillata (L.f.) Royle | 6 images |
| Hydrocharis morsus-ranae L. | 532 images |
| Hydrocotyle americana L. | 53 images |
| Hydrocotyle ranunculoides L.f. | 256 images |
| Hydrocotyle sibthorpioides Lam. | 1188 images |
| Hydrocotyle umbellata L. | 63 images |
| Hydrocotyle verticillata Thunb. | 702 images |
| Hydrocotyle vulgaris L. | 720 images |
| Hydrophyllum appendiculatum Michx. | 166 images |
| Hydrophyllum canadense L. | 24 images |
| Hydrophyllum macrophyllum Nutt. | 28 images |
| Hydrophyllum virginianum L. | 871 images |
| Hylodesmum glutinosum (Muhl. ex Willd.) H.Ohashi & R.R.Mill | 103 images |
| Hylodesmum nudiflorum (L.) H.Ohashi & R.R.Mill | 8 images |
| Hylotelephium erythrostictum (Miq.) H.Ohba | 28 images |
| Hylotelephium telephioides (Michx.) H.Ohba | 174 images |
| Hylotelephium telephium (L.) H.Ohba | 8867 images |
| Hymenocallis occidentalis (Leconte) Kunth | 13 images |
| Hymenopappus scabiosaeus L'Hér. | 9 images |
| Hyoscyamus niger L. | 1573 images |
| Hypericum ascyron L. | 35 images |
| Hypericum canadense L. | 10 images |
| Hypericum crux-andreae (L.) Crantz | 6 images |
| Hypericum densiflorum Pursh | 19 images |
| Hypericum denticulatum Walter | 1 images |
| Hypericum ellipticum Hook. | 13 images |
| Hypericum fraseri (Spach) Steud. | 48 images |
| Hypericum frondosum Michx. | 95 images |
| Hypericum gentianoides (L.) Britton, Sterns & Poggenb. | 37 images |
| Hypericum humifusum L. | 1179 images |
| Hypericum hypericoides (L.) Crantz | 298 images |
| Hypericum kalmianum L. | 206 images |
| Hypericum majus (A.Gray) Britton | 6 images |
| Hypericum mutilum L. | 121 images |
| Hypericum perforatum L. | 17869 images |
| Hypericum prolificum L. | 239 images |
| Hypericum punctatum Lam. | 279 images |
| Hypericum sphaerocarpum Michx. | 12 images |
| Hypericum virginicum L. | 26 images |
| Hypochaeris glabra L. | 3087 images |
| Hypochaeris radicata L. | 10644 images |
| Hypoxis hirsuta (L.) Coville | 328 images |
| Hyssopus officinalis L. | 2628 images |
| Iberis amara L. | 1951 images |
| Iberis sempervirens L. | 5291 images |
| Iberis umbellata L. | 1691 images |
| Idesia polycarpa Maxim. | 131 images |
| Ilex aquifolium L. | 17747 images |
| Ilex collina Alexander | 7 images |
| Ilex crenata Thunb. | 701 images |
| Ilex decidua Walter | 361 images |
| Ilex glabra (L.) A.Gray | 1 images |
| Ilex montana Torr. & A.Gray | 18 images |
| Ilex mucronata (L.) M.Powell, Savol. & S.Andrews | 140 images |
| Ilex opaca Aiton | 1555 images |
| Ilex verticillata (L.) A.Gray | 23 images |
| Iliamna remota Greene | 1 images |
| Impatiens balsamina L. | 2726 images |
| Impatiens capensis Meerb. | 2768 images |
| Impatiens glandulifera Royle | 16890 images |
| Impatiens pallida Nutt. | 1127 images |
| Impatiens walleriana Hook.f. | 5924 images |
| Inula helenium L. | 3127 images |
| Iodanthus pinnatifidus (Michx.) Steud. | 56 images |
| Ionactis linariifolia (L.) Greene | 26 images |
| Ipomoea batatas (L.) Lam. | 4603 images |
| Ipomoea coccinea L. | 32 images |
| Ipomoea hederacea Jacq. | 702 images |
| Ipomoea hederifolia L. | 816 images |
| Ipomoea lacunosa L. | 413 images |
| Ipomoea purpurea (L.) Roth | 8445 images |
| Ipomoea quamoclit L. | 812 images |
| Ipomopsis rubra (L.) Wherry | 156 images |
| Iris × germanica L. | 7920 images |
| Iris brevicaulis Raf. | 19 images |
| Iris cristata Aiton | 192 images |
| Iris domestica (L.) Goldblatt & Mabb. | 1099 images |
| Iris ensata Thunb. | 422 images |
| Iris hookeri Penny ex G.Don | 3 images |
| Iris lacustris Nutt. | 6 images |
| Iris orientalis Mill. | 1328 images |
| Iris pallida Lam. | 2612 images |
| Iris prismatica Pursh | 2 images |
| Iris pseudacorus L. | 10668 images |
| Iris pumila L. | 1663 images |
| Iris sibirica L. | 2680 images |
| Iris verna L. | 42 images |
| Iris versicolor L. | 939 images |
| Iris virginica L. | 146 images |
| Isatis tinctoria L. | 4056 images |
| Isoetes lacustris L. | 28 images |
| Isolepis setacea (L.) R.Br. | 89 images |
| Isotria medeoloides (Pursh) Raf. | 19 images |
| Isotria verticillata (Muhl. ex Willd.) Raf. | 1 images |
| Itea virginica L. | 144 images |
| Iva annua L. | 142 images |
| Iva frutescens L. | 77 images |
| Ixeris stolonifera A.Gray | 6 images |
| Jacobaea erucifolia (L.) G.Gaertn., B.Mey. & Scherb. | 274 images |
| Jacobaea pseudoarnica (Less.) Zuev | 28 images |
| Jacobaea vulgaris Gaertn. | 20381 images |
| Jasione montana L. | 6513 images |
| Jeffersonia diphylla (L.) Pers. | 125 images |
| Juglans cinerea L. | 569 images |
| Juglans mandshurica Maxim. | 649 images |
| Juglans nigra L. | 8728 images |
| Juncus alpinoarticulatus Chaix | 155 images |
| Juncus articulatus L. | 850 images |
| Juncus balticus Willd. | 36 images |
| Juncus brachycarpus Engelm. | 1 images |
| Juncus brachycephalus (Engelm.) Buchenau | 3 images |
| Juncus bufonius L. | 560 images |
| Juncus canadensis J.Gay ex Laharpe | 2 images |
| Juncus compressus Jacq. | 248 images |
| Juncus conglomeratus L. | 945 images |
| Juncus dichotomus Elliott | 7 images |
| Juncus diffusissimus Buckley | 2 images |
| Juncus dudleyi Wiegand | 10 images |
| Juncus effusus L. | 4148 images |
| Juncus ensifolius Wikstr. | 99 images |
| Juncus filiformis L. | 117 images |
| Juncus gerardi Loisel. | 121 images |
| Juncus inflexus L. | 951 images |
| Juncus interior Wiegand | 3 images |
| Juncus marginatus Rostk. | 6 images |
| Juncus maritimus Lam. | 446 images |
| Juncus nodosus L. | 3 images |
| Juncus scirpoides Lam. | 3 images |
| Juncus stygius L. | 10 images |
| Juncus tenuis Willd. | 767 images |
| Juncus torreyi Coville | 34 images |
| Juniperus communis L. | 9679 images |
| Juniperus horizontalis Moench | 2152 images |
| Juniperus virginiana L. | 4904 images |
| Kalmia angustifolia L. | 518 images |
| Kalmia buxifolia (P.J.Bergius) Gift & Kron | 16 images |
| Kalmia latifolia L. | 1882 images |
| Kalmia polifolia Wangenh. | 132 images |
| Kalmia procumbens (L.) Gift, Kron & P.F.Stevens ex Galasso, Banfi & F.Conti | 501 images |
| Kalopanax septemlobus (Thunb.) Koidz. | 138 images |
| Kerria japonica (L.) DC. | 7961 images |
| Kickxia elatine (L.) Dumort. | 395 images |
| Kickxia spuria (L.) Dumort. | 930 images |
| Knautia arvensis (L.) Coult. | 16648 images |
| Koeleria macrantha (Ledeb.) Schult. | 142 images |
| Koeleria spicata (L.) Barberá, Quintanar, Soreng & P.M.Peterson | 87 images |
| Koelreuteria paniculata Laxm. | 10382 images |
| Koenigia polystachya (Wall. ex Meisn.) T.M.Schust. & Reveal | 330 images |
| Kolkwitzia amabilis Graebn. | 6384 images |
| Kosteletzkya pentacarpos (L.) Ledeb. | 62 images |
| Krigia biflora (Walter) S.F.Blake | 64 images |
| Krigia dandelion Nutt. | 59 images |
| Krigia virginica (L.) Willd. | 84 images |
| Kummerowia stipulacea (Maxim.) Makino | 6 images |
| Kummerowia striata (Thunb.) Schindl. | 186 images |
| Lablab purpureus (L.) Sweet | 986 images |
| Lachnagrostis filiformis (G.Forst.) Trin. | 1 images |
| Lachnanthes caroliniana (Lam.) Dandy | 20 images |
| Lactuca biennis (Moench) Fernald | 173 images |
| Lactuca canadensis L. | 499 images |
| Lactuca floridana (L.) Gaertn. | 699 images |
| Lactuca graminifolia Michx. | 16 images |
| Lactuca hirsuta Muhl. ex Nutt. | 25 images |
| Lactuca muralis (L.) E.Mey. | 815 images |
| Lactuca saligna L. | 462 images |
| Lactuca sativa L. | 5258 images |
| Lactuca serriola L. | 14067 images |
| Lagenaria siceraria (Molina) Standl. | 986 images |
| Lagerstroemia indica L. | 17731 images |
| Lagurus ovatus L. | 3948 images |
| Lamium album L. | 8601 images |
| Lamium amplexicaule L. | 5371 images |
| Lamium galeobdolon (L.) L. | 14155 images |
| Lamium hybridum Vill. | 8440 images |
| Lamium maculatum (L.) L. | 11837 images |
| Lamium purpureum L. | 16521 images |
| Lamprocapnos spectabilis (L.) Fukuhara | 3479 images |
| Laportea canadensis (L.) Wedd. | 334 images |
| Lappula marginata (M.Bieb.) Gürke | 40 images |
| Lappula occidentalis (S.Watson) Greene | 6 images |
| Lappula squarrosa (Retz.) Dumort. | 257 images |
| Lapsana communis L. | 15557 images |
| Larix decidua Mill. | 7053 images |
| Larix kaempferi (Lamb.) Carrière | 609 images |
| Larix laricina (Du Roi) K.Koch | 255 images |
| Lasthenia minor (DC.) Ornduff | 11 images |
| Lathyrus japonicus Willd. | 733 images |
| Lathyrus latifolius L. | 11075 images |
| Lathyrus ochroleucus Hook. | 38 images |
| Lathyrus oleraceus Lam. | 5433 images |
| Lathyrus palustris L. | 243 images |
| Lathyrus pratensis L. | 5487 images |
| Lathyrus sylvestris L. | 3150 images |
| Lathyrus tuberosus L. | 2463 images |
| Lathyrus venosus Muhl. ex Willd. | 20 images |
| Lavandula angustifolia Mill. | 11218 images |
| Leavenworthia uniflora (Michx.) Britton | 3 images |
| Lechea minor L. | 2 images |
| Lechea mucronata Raf. | 10 images |
| Lechea racemulosa Michx. | 2 images |
| Leersia lenticularis Michx. | 1 images |
| Leersia oryzoides (L.) Sw. | 296 images |
| Leersia virginica Willd. | 60 images |
| Lemna minor L. | 1088 images |
| Lemna minuta Kunth | 117 images |
| Lemna perpusilla Torr. | 1 images |
| Lemna trisulca L. | 125 images |
| Lemna turionifera Landolt | 22 images |
| Lemna valdiviana Phil. | 7 images |
| Leontodon hispidus L. | 3836 images |
| Leontodon saxatilis Lam. | 1548 images |
| Leonurus cardiaca L. | 4010 images |
| Leonurus japonicus Houtt. | 30 images |
| Lepidium campestre (L.) W.T.Aiton | 51 images |
| Lepidium coronopus (L.) Al-Shehbaz | 162 images |
| Lepidium densiflorum Schrad. | 76 images |
| Lepidium didymum L. | 1674 images |
| Lepidium draba L. | 8295 images |
| Lepidium heterophyllum Benth. | 333 images |
| Lepidium latifolium L. | 902 images |
| Lepidium montanum Nutt. | 29 images |
| Lepidium nitidum Nutt. | 40 images |
| Lepidium perfoliatum L. | 46 images |
| Lepidium ruderale L. | 267 images |
| Lepidium sativum L. | 977 images |
| Lepidium virginicum L. | 2092 images |
| Leptochloa crinita (Lag.) P.M.Peterson & N.Snow | 6 images |
| Leptochloa panicea (Retz.) Ohwi | 5 images |
| Leptosiphon androsaceus Benth. | 9 images |
| Lespedeza bicolor Turcz. | 576 images |
| Lespedeza capitata Michx. | 144 images |
| Lespedeza cuneata (Dum.Cours.) G.Don | 172 images |
| Lespedeza hirta (L.) Hornem. | 85 images |
| Lespedeza procumbens Michx. | 23 images |
| Lespedeza repens (L.) W.P.C.Barton | 1 images |
| Lespedeza stuevei Nutt. | 7 images |
| Lespedeza thunbergii (DC.) Nakai | 335 images |
| Lespedeza violacea Pers. | 35 images |
| Lespedeza virginica (L.) Britton | 147 images |
| Leucanthemella serotina (L.) Tzvelev | 142 images |
| Leucanthemum vulgare Lam. | 11269 images |
| Leucojum aestivum L. | 2257 images |
| Leucospora multifida (Michx.) Nutt. | 32 images |
| Leucothoe axillaris (Lam.) D.Don | 163 images |
| Leucothoe fontanesiana (Steud.) Sleumer | 614 images |
| Leuzea repens (L.) D.J.N.Hind | 34 images |
| Levisticum officinale W.D.J.Koch | 1780 images |
| Leymus arenarius (L.) Hochst. | 1367 images |
| Leymus mollis (Trin.) Pilg. | 7 images |
| Leymus racemosus (Lam.) Tzvelev | 17 images |
| Liatris aspera Michx. | 240 images |
| Liatris cylindracea Michx. | 38 images |
| Liatris punctata Hook. | 209 images |
| Liatris pycnostachya Michx. | 766 images |
| Liatris scariosa (L.) Willd. | 34 images |
| Liatris spicata (L.) Willd. | 2655 images |
| Liatris squarrosa (L.) Michx. | 74 images |
| Liatris squarrulosa Michx. | 9 images |
| Ligusticum canadense (L.) Britton | 16 images |
| Ligusticum scothicum L. | 151 images |
| Ligustrum obtusifolium Siebold & Zucc. | 229 images |
| Ligustrum ovalifolium Hassk. | 6261 images |
| Ligustrum vulgare L. | 21009 images |
| Lilium canadense L. | 156 images |
| Lilium candidum L. | 4674 images |
| Lilium lancifolium Thunb. | 1985 images |
| Lilium michauxii Poir. | 27 images |
| Lilium michiganense Farw. | 90 images |
| Lilium philadelphicum L. | 121 images |
| Lilium superbum L. | 106 images |
| Limonium carolinianum (Walter) Britton | 90 images |
| Limosella australis R.Br. | 7 images |
| Linaria bipartita (Vent.) Willd. | 1 images |
| Linaria dalmatica (L.) Mill. | 230 images |
| Linaria genistifolia (L.) Mill. | 308 images |
| Linaria maroccana Hook.f. | 1962 images |
| Linaria repens (L.) Mill. | 4190 images |
| Linaria spartea (L.) Chaz. | 332 images |
| Linaria supina (L.) Chaz. | 2227 images |
| Linaria vulgaris Mill. | 19109 images |
| Lindera benzoin (L.) Blume | 1010 images |
| Lindernia dubia (L.) Pennell | 245 images |
| Linnaea borealis L. | 755 images |
| Linum bienne Mill. | 587 images |
| Linum catharticum L. | 800 images |
| Linum grandiflorum Desf. | 3078 images |
| Linum lewisii Pursh | 181 images |
| Linum medium (Planch.) Britton | 24 images |
| Linum perenne L. | 3211 images |
| Linum sulcatum Riddell | 4 images |
| Linum usitatissimum L. | 5975 images |
| Linum virginianum L. | 1 images |
| Lipandra polysperma (L.) S.Fuentes, Uotila & Borsch | 1299 images |
| Liparis liliifolia (L.) Rich. ex Lindl. | 12 images |
| Liparis loeselii (L.) Rich. | 198 images |
| Liquidambar styraciflua L. | 12832 images |
| Liriodendron tulipifera L. | 10945 images |
| Lithospermum canescens (Michx.) Lehm. | 153 images |
| Lithospermum incisum Lehm. | 141 images |
| Lithospermum latifolium Michx. | 9 images |
| Lithospermum officinale L. | 1777 images |
| Lithospermum parviflorum Weakley, Witsell & D.Estes | 2 images |
| Lobelia cardinalis L. | 2262 images |
| Lobelia dortmanna L. | 174 images |
| Lobelia inflata L. | 653 images |
| Lobelia kalmii L. | 65 images |
| Lobelia nuttallii Schult. | 1 images |
| Lobelia puberula Michx. | 113 images |
| Lobelia siphilitica L. | 1435 images |
| Lobelia spicata Lam. | 134 images |
| Lobularia maritima (L.) Desv. | 14394 images |
| Logfia minima (Sm.) Dumort. | 240 images |
| Lolium arundinaceum (Schreb.) Darbysh. | 953 images |
| Lolium giganteum (L.) Darbysh. | 245 images |
| Lolium multiflorum Lam. | 423 images |
| Lolium perenne L. | 3531 images |
| Lolium pratense (Huds.) Darbysh. | 813 images |
| Lolium temulentum L. | 32 images |
| Lomatogonium rotatum (L.) Fr. | 1 images |
| Lonicera canadensis J.Bartram & W.Bartram ex Marshall | 141 images |
| Lonicera caprifolium L. | 3016 images |
| Lonicera dioica L. | 123 images |
| Lonicera flava Sims | 41 images |
| Lonicera fragrantissima Lindl. & Paxton | 2176 images |
| Lonicera hirsuta Eaton | 26 images |
| Lonicera involucrata (Richardson) Banks ex Spreng. | 890 images |
| Lonicera japonica Thunb. | 11164 images |
| Lonicera korolkowii Stapf | 4 images |
| Lonicera maackii (Rupr.) Maxim. | 2731 images |
| Lonicera oblongifolia Hook. | 4 images |
| Lonicera periclymenum L. | 8567 images |
| Lonicera reticulata Raf. | 23 images |
| Lonicera ruprechtiana Regel | 3 images |
| Lonicera sempervirens L. | 1662 images |
| Lonicera tatarica L. | 5722 images |
| Lonicera villosa (Michx.) Schult. | 3 images |
| Lonicera xylosteum L. | 11054 images |
| Lotus corniculatus L. | 20222 images |
| Lotus tenuis Waldst. & Kit. ex Willd. | 5047 images |
| Ludwigia alternifolia L. | 223 images |
| Ludwigia decurrens Walter | 49 images |
| Ludwigia glandulosa Walter | 4 images |
| Ludwigia grandiflora (Michx.) Greuter & Burdet | 1371 images |
| Ludwigia leptocarpa (Nutt.) H.Hara | 7 images |
| Ludwigia linearis Walter | 9 images |
| Ludwigia palustris (L.) Elliott | 326 images |
| Ludwigia peploides (Kunth) P.H.Raven | 811 images |
| Ludwigia repens J.R.Forst. | 9 images |
| Ludwigia sphaerocarpa Elliott | 1 images |
| Lunaria annua L. | 21339 images |
| Lupinus perennis L. | 1074 images |
| Lupinus polyphyllus Lindl. | 9060 images |
| Luzula acuminata Raf. | 15 images |
| Luzula campestris (L.) DC. | 2039 images |
| Luzula luzuloides (Lam.) Dandy & Wilmott | 608 images |
| Luzula multiflora (Ehrh.) Lej. | 382 images |
| Luzula pallescens Sw. | 5 images |
| Luzula parviflora (Ehrh.) Desv. | 4 images |
| Luzula spicata (L.) DC. | 68 images |
| Lycium barbarum L. | 3343 images |
| Lycium chinense Mill. | 207 images |
| Lycopodiella appressa (Chapm.) Cranfill | 3 images |
| Lycopodiella inundata (L.) Holub | 158 images |
| Lycopodium × issleri (Rouy) Domin | 32 images |
| Lycopodium × zeilleri (Rouy) Greuter & Burdet | 59 images |
| Lycopodium annotinum L. | 1089 images |
| Lycopodium clavatum L. | 824 images |
| Lycopodium complanatum L. | 282 images |
| Lycopodium dendroideum Michx. | 235 images |
| Lycopodium digitatum Dill. ex A.Braun | 34 images |
| Lycopodium obscurum L. | 3 images |
| Lycopodium tristachyum Pursh | 98 images |
| Lycopus americanus Muhl. ex W.P.C.Barton | 8 images |
| Lycopus asper Greene | 11 images |
| Lycopus europaeus L. | 6581 images |
| Lycopus rubellus Moench | 8 images |
| Lycopus uniflorus Michx. | 158 images |
| Lycopus virginicus L. | 41 images |
| Lycoris squamigera Maxim. | 459 images |
| Lygodesmia juncea (Pursh) D.Don ex Hook. | 1 images |
| Lygodium japonicum (Thunb.) Sw. | 149 images |
| Lygodium palmatum (Bernh.) Sw. | 44 images |
| Lyonia ligustrina (L.) DC. | 14 images |
| Lyonia mariana (L.) D.Don | 8 images |
| Lysimachia arvensis (L.) U.Manns & Anderb. | 11418 images |
| Lysimachia borealis (Raf.) U.Manns & Anderb. | 635 images |
| Lysimachia ciliata L. | 1025 images |
| Lysimachia clethroides Duby | 1289 images |
| Lysimachia foemina (Mill.) U.Manns & Anderb. | 2544 images |
| Lysimachia hybrida Michx. | 1 images |
| Lysimachia japonica Thunb. | 6 images |
| Lysimachia lanceolata Walter | 30 images |
| Lysimachia maritima (L.) Galasso, Banfi & Soldano | 452 images |
| Lysimachia minima (L.) U.Manns & Anderb. | 18 images |
| Lysimachia nummularia L. | 4999 images |
| Lysimachia punctata L. | 10395 images |
| Lysimachia quadriflora Sims | 12 images |
| Lysimachia quadrifolia L. | 213 images |
| Lysimachia terrestris (L.) Britton, Sterns & Poggenb. | 37 images |
| Lysimachia thyrsiflora L. | 376 images |
| Lysimachia vulgaris L. | 9604 images |
| Lythrum alatum Pursh | 63 images |
| Lythrum hyssopifolia L. | 576 images |
| Lythrum lineare L. | 6 images |
| Lythrum salicaria L. | 26344 images |
| Lythrum virgatum L. | 4025 images |
| Machaeranthera tanacetifolia (Kunth) Nees | 137 images |
| Macleaya cordata (Willd.) R.Br. | 1068 images |
| Maclura pomifera (Raf.) C.K.Schneid. | 4572 images |
| Madia glomerata Hook. | 6 images |
| Madia sativa Molina | 84 images |
| Magnolia × soulangeana Soul.-Bod. | 5944 images |
| Magnolia acuminata (L.) L. | 960 images |
| Magnolia fraseri Walter | 128 images |
| Magnolia kobus DC. | 2250 images |
| Magnolia macrophylla Michx. | 566 images |
| Magnolia tripetala (L.) L. | 479 images |
| Magnolia virginiana L. | 3592 images |
| Maianthemum canadense Desf. | 1137 images |
| Maianthemum racemosum (L.) Link | 1652 images |
| Maianthemum stellatum (L.) Link | 606 images |
| Maianthemum trifolium (L.) Sloboda | 29 images |
| Malaxis monophyllos (L.) Sw. | 54 images |
| Malaxis unifolia Michx. | 17 images |
| Malus × floribunda Siebold ex Van Houtte | 5697 images |
| Malus × zumi (Matsum.) Rehder | 29 images |
| Malus angustifolia (Aiton) Michx. | 31 images |
| Malus baccata (L.) Borkh. | 3122 images |
| Malus coronaria (L.) Mill. | 122 images |
| Malus domestica (Suckow) Borkh. | 8888 images |
| Malus hupehensis (Pamp.) Rehder | 2168 images |
| Malus ioensis (Alph.Wood) Britton | 22 images |
| Malus prunifolia (Willd.) Borkh. | 259 images |
| Malus toringo (Siebold) de Vriese | 151 images |
| Malva alcea L. | 14088 images |
| Malva moschata L. | 5988 images |
| Malva neglecta Wallr. | 6139 images |
| Malva parviflora L. | 3136 images |
| Malva pusilla Sm. | 1653 images |
| Malva setigera K.F.Schimp. & Spenn. | 146 images |
| Malva sylvestris L. | 27507 images |
| Malva trimestris (L.) Salisb. | 3526 images |
| Malva verticillata L. | 263 images |
| Marrubium peregrinum L. | 160 images |
| Marrubium vulgare L. | 4678 images |
| Marsilea quadrifolia L. | 304 images |
| Matelea decipiens (Alexander) Woodson | 10 images |
| Matelea obliqua (Jacq.) Woodson | 6 images |
| Matricaria chamomilla L. | 10451 images |
| Matricaria discoidea DC. | 3935 images |
| Mazus miquelii Makino | 25 images |
| Mazus pumilus (Burm.f.) Steenis | 286 images |
| Mecardonia acuminata (Walter) Small | 7 images |
| Medeola virginiana L. | 361 images |
| Medicago × varia Martyn | 841 images |
| Medicago arabica (L.) Huds. | 3599 images |
| Medicago falcata L. | 1796 images |
| Medicago littoralis Rohde ex Loisel. | 513 images |
| Medicago lupulina L. | 7977 images |
| Medicago minima (L.) Bartal. | 59 images |
| Medicago monspeliaca (L.) Trautv. | 128 images |
| Medicago polymorpha L. | 2925 images |
| Medicago praecox DC. | 52 images |
| Medicago sativa L. | 17772 images |
| Medicago turbinata (L.) All. | 10 images |
| Meehania cordata (Nutt.) Britton | 8 images |
| Melampyrum lineare Lam. | 182 images |
| Melanthium virginicum L. | 9 images |
| Melica altissima L. | 57 images |
| Melica mutica Walter | 21 images |
| Melica nitens (Scribn.) Nutt. ex Piper | 3 images |
| Melilotus albus Medik. | 8429 images |
| Melilotus altissimus Thuill. | 567 images |
| Melilotus indicus (L.) All. | 2428 images |
| Melilotus officinalis (L.) Lam. | 4731 images |
| Melissa officinalis L. | 15035 images |
| Melothria pendula L. | 583 images |
| Menispermum canadense L. | 301 images |
| Mentha × dumetorum Schult. | 1 images |
| Mentha × gracilis Sole | 12 images |
| Mentha × piperita L. | 3807 images |
| Mentha × rotundifolia (L.) Huds. | 1650 images |
| Mentha × verticillata L. | 48 images |
| Mentha × villosa Huds. | 542 images |
| Mentha aquatica L. | 8328 images |
| Mentha arvensis L. | 3540 images |
| Mentha canadensis L. | 14 images |
| Mentha longifolia (L.) L. | 3082 images |
| Mentha pulegium L. | 2962 images |
| Mentha spicata L. | 9410 images |
| Mentha suaveolens Ehrh. | 11595 images |
| Menyanthes trifoliata L. | 2018 images |
| Mercurialis annua L. | 7702 images |
| Mercurialis perennis L. | 4421 images |
| Mertensia maritima (L.) Gray | 433 images |
| Mertensia paniculata (Aiton) G.Don | 82 images |
| Mertensia virginica (L.) Pers. ex Link | 936 images |
| Mesembryanthemum crystallinum L. | 1207 images |
| Mesembryanthemum nodiflorum L. | 1757 images |
| Mibora minima (L.) Desv. | 187 images |
| Micranthes micranthidifolia (Haw.) Small | 8 images |
| Micranthes pensylvanica (L.) Haw. | 43 images |
| Micranthes petiolaris (Raf.) Bush | 22 images |
| Micranthes virginiensis (Michx.) Small | 108 images |
| Microstegium vimineum (Trin.) A.Camus | 157 images |
| Microsteris gracilis (Hook.) Greene | 23 images |
| Mikania scandens (L.) Willd. | 325 images |
| Milium effusum L. | 409 images |
| Mimulus alatus Aiton | 124 images |
| Mimulus ringens L. | 526 images |
| Mirabilis albida (Walter) Heimerl | 54 images |
| Mirabilis jalapa L. | 17560 images |
| Mirabilis linearis (Pursh) Heimerl | 17 images |
| Mirabilis nyctaginea (Michx.) MacMill. | 283 images |
| Miscanthus sacchariflorus (Maxim.) Benth. & Hook.f. ex Franch. | 62 images |
| Miscanthus sinensis Andersson | 4365 images |
| Misopates orontium (L.) Raf. | 1959 images |
| Mitchella repens L. | 1033 images |
| Mitella diphylla L. | 134 images |
| Mitella nuda L. | 16 images |
| Modiola caroliniana (L.) G.Don | 256 images |
| Moehringia lateriflora (L.) Fenzl | 44 images |
| Moehringia macrophylla (Hook.) Fenzl | 30 images |
| Moehringia trinervia (L.) Clairv. | 811 images |
| Molinia caerulea (L.) Moench | 1420 images |
| Mollugo verticillata L. | 373 images |
| Moltkiopsis ciliata (Forssk.) I.M.Johnst. | 50 images |
| Moluccella laevis L. | 327 images |
| Momordica charantia L. | 2170 images |
| Monarda bradburiana Beck | 25 images |
| Monarda clinopodia L. | 97 images |
| Monarda didyma L. | 3745 images |
| Monarda fistulosa L. | 2818 images |
| Monarda media Willd. | 18 images |
| Monarda punctata L. | 468 images |
| Moneses uniflora (L.) A.Gray | 408 images |
| Mononeuria patula (Michx.) Dillenb. & Kadereit | 27 images |
| Monotropa hypopitys L. | 1323 images |
| Monotropa uniflora L. | 1241 images |
| Montia chamissoi (Ledeb. ex Spreng.) Greene | 6 images |
| Montia fontana L. | 281 images |
| Morus alba L. | 12385 images |
| Morus rubra L. | 3851 images |
| Muhlenbergia capillaris (Lam.) Trin. | 317 images |
| Muhlenbergia frondosa (Poir.) Fernald | 8 images |
| Muhlenbergia glabrifloris Scribn. | 1 images |
| Muhlenbergia glomerata (Willd.) Trin. | 1 images |
| Muhlenbergia mexicana (L.) Trin. | 11 images |
| Muhlenbergia schreberi J.F.Gmel. | 13 images |
| Mummenhoffia alliacea (L.) Esmailbegi & Al-Shehbaz | 267 images |
| Murdannia nudiflora (L.) Brenan | 165 images |
| Muscari armeniacum H.J.Veitch | 35 images |
| Muscari botryoides (L.) Mill. | 5651 images |
| Muscari comosum (L.) Mill. | 11412 images |
| Muscari neglectum Guss. ex Ten. | 10881 images |
| Myosotis arvensis (L.) Hill | 3540 images |
| Myosotis discolor Pers. | 885 images |
| Myosotis laxa Lehm. | 346 images |
| Myosotis macrosperma Engelm. | 91 images |
| Myosotis scorpioides L. | 6347 images |
| Myosotis stricta Link ex Roem. & Schult. | 740 images |
| Myosotis sylvatica Ehrh. ex Hoffm. | 585 images |
| Myosotis verna Nutt. | 13 images |
| Myrica caroliniensis Mill. | 10 images |
| Myrica cerifera L. | 681 images |
| Myrica gale L. | 809 images |
| Myrica pensylvanica Mirb. | 128 images |
| Myriophyllum alterniflorum DC. | 58 images |
| Myriophyllum aquaticum (Vell.) Verdc. | 653 images |
| Myriophyllum heterophyllum Michx. | 10 images |
| Myriophyllum sibiricum Kom. | 8 images |
| Myriophyllum spicatum L. | 410 images |
| Myriophyllum verticillatum L. | 84 images |
| Myrrhis odorata (L.) Scop. | 1791 images |
| Nabalus albus (L.) Hook. | 227 images |
| Nabalus altissimus (L.) Hook. | 11 images |
| Nabalus serpentarius (Pursh) Hook. | 9 images |
| Najas gracillima (A.Braun ex Engelm.) Magnus | 1 images |
| Najas guadalupensis (Spreng.) Magnus | 15 images |
| Najas marina L. | 159 images |
| Najas minor All. | 27 images |
| Napaea dioica L. | 34 images |
| Narcissus × incomparabilis Mill. | 85 images |
| Narcissus × medioluteus Mill. | 579 images |
| Narcissus jonquilla L. | 2122 images |
| Narcissus poeticus L. | 3127 images |
| Narcissus pseudonarcissus L. | 9611 images |
| Nardus stricta L. | 401 images |
| Narthecium americanum Ker Gawl. | 1 images |
| Nassella viridula (Trin.) Barkworth | 1 images |
| Nasturtium microphyllum (Boenn.) Rchb. | 76 images |
| Nasturtium officinale W.T.Aiton | 961 images |
| Navarretia intertexta (Benth.) Hook. | 27 images |
| Navarretia leucocephala Benth. | 29 images |
| Navarretia squarrosa (Eschsch.) Hook. & Arn. | 6 images |
| Nekemias arborea (L.) J.Wen & Boggan | 1 images |
| Nelumbo lutea (Willd.) Pers. | 6 images |
| Nelumbo nucifera Gaertn. | 2324 images |
| Nemophila aphylla (L.) Brummitt | 30 images |
| Neottia auriculata (Wiegand) Szlach. | 1 images |
| Neottia bifolia (Raf.) Baumbach | 1 images |
| Neottia convallarioides (Sw.) Rich. | 4 images |
| Neottia cordata (L.) Rich. | 219 images |
| Neottia smallii (Wiegand) Szlach. | 2 images |
| Nepeta cataria L. | 4261 images |
| Nepeta grandiflora M.Bieb. | 277 images |
| Nepeta racemosa Lam. | 6029 images |
| Neslia paniculata (L.) Desv. | 86 images |
| Nicandra physalodes (L.) Gaertn. | 3373 images |
| Nicotiana acuminata (Graham) Hook. | 36 images |
| Nicotiana alata Link & Otto | 1427 images |
| Nicotiana rustica L. | 427 images |
| Nicotiana sylvestris Speg. | 965 images |
| Nicotiana tabacum L. | 3068 images |
| Nigella damascena L. | 14283 images |
| Nipponanthemum nipponicum (Franch. ex Maxim.) Kitam. | 300 images |
| Noccaea perfoliata (L.) Al-Shehbaz | 1260 images |
| Nonea lutea (Desr.) DC. | 224 images |
| Nonea vesicaria (L.) Rchb. | 160 images |
| Nothoscordum bivalve (L.) Britton | 637 images |
| Nuphar advena (Aiton) W.T.Aiton | 3 images |
| Nuphar microphylla (Pers.) Fernald | 1 images |
| Nuphar variegata Engelm. ex Durand | 1 images |
| Nuttallanthus canadensis (L.) D.A.Sutton | 31 images |
| Nymphaea odorata Aiton | 473 images |
| Nymphoides cordata (Elliott) Fernald | 8 images |
| Nymphoides peltata (S.G.Gmel.) Kuntze | 548 images |
| Nyssa biflora Walter | 13 images |
| Nyssa sylvatica Marshall | 1256 images |
| Obolaria virginica L. | 66 images |
| Ocimum basilicum L. | 10000 images |
| Oclemena acuminata (Michx.) Greene | 391 images |
| Odontites vulgaris Moench | 26 images |
| Oenanthe aquatica (L.) Poir. | 418 images |
| Oenothera albicaulis Pursh | 66 images |
| Oenothera argillicola Mack. | 9 images |
| Oenothera biennis L. | 15768 images |
| Oenothera curtiflora W.L.Wagner & Hoch | 4 images |
| Oenothera filiformis (Small) W.L.Wagner & Hoch | 4 images |
| Oenothera filipes (Spach) W.L.Wagner & Hoch | 9 images |
| Oenothera fruticosa L. | 1935 images |
| Oenothera gaura W.L.Wagner & Hoch | 2967 images |
| Oenothera glazioviana Micheli | 9160 images |
| Oenothera grandiflora L'Hér. | 1 images |
| Oenothera grandis Smyth | 2 images |
| Oenothera humifusa Nutt. | 15 images |
| Oenothera laciniata Hill | 606 images |
| Oenothera mollissima L. | 11 images |
| Oenothera nuttallii Torr. & A.Gray | 3 images |
| Oenothera oakesiana (A.Gray) J.W.Robbins ex S.Watson | 6 images |
| Oenothera parviflora L. | 3183 images |
| Oenothera perennis L. | 12 images |
| Oenothera pilosella Raf. | 42 images |
| Oenothera rhombipetala Nutt. | 12 images |
| Oenothera speciosa Nutt. | 3461 images |
| Oenothera suffrutescens (Moc. & Sessé ex Ser.) W.L.Wagner & Hoch | 106 images |
| Oenothera tetragona Roth | 23 images |
| Oenothera triloba Nutt. | 85 images |
| Oenothera villosa Thunb. | 118 images |
| Oloptum miliaceum (L.) Röser & Hamasha | 994 images |
| Omalotheca supina (L.) DC. | 176 images |
| Omalotheca sylvatica (L.) Sch.Bip. & F.W.Schultz | 659 images |
| Onobrychis viciifolia Scop. | 7965 images |
| Onoclea sensibilis L. | 1837 images |
| Ononis spinosa L. | 5257 images |
| Onopordum acanthium L. | 5645 images |
| Ophioglossum engelmannii Prantl | 12 images |
| Ophioglossum pusillum Raf. | 4 images |
| Ophioglossum vulgatum L. | 383 images |
| Oplopanax horridus (Sm.) Miq. | 287 images |
| Opuntia cespitosa Raf. | 2 images |
| Opuntia fragilis (Nutt.) Haw. | 186 images |
| Opuntia humifusa (Raf.) Raf. | 1393 images |
| Opuntia mesacantha Raf. | 1 images |
| Orbexilum onobrychis (Nutt.) Rydb. | 4 images |
| Oreojuncus trifidus (L.) Záv.Drábk. & Kirschner | 220 images |
| Origanum vulgare L. | 22373 images |
| Ornithogalum nutans L. | 1283 images |
| Ornithogalum pyrenaicum L. | 1719 images |
| Ornithogalum umbellatum L. | 8682 images |
| Ornithopus sativus Brot. | 177 images |
| Orobanche fasciculata Nutt. | 139 images |
| Orobanche minor Sm. | 2408 images |
| Orobanche ramosa L. | 482 images |
| Orobanche uniflora L. | 118 images |
| Orontium aquaticum L. | 137 images |
| Orthilia secunda (L.) House | 602 images |
| Orthocarpus bracteosus Benth. | 5 images |
| Oryzopsis asperifolia Michx. | 4 images |
| Osmorhiza berteroi DC. | 13 images |
| Osmorhiza claytonii (Michx.) C.B.Clarke | 25 images |
| Osmorhiza depauperata Phil. | 7 images |
| Osmorhiza longistylis (Torr.) DC. | 386 images |
| Osmunda claytoniana L. | 464 images |
| Osmunda spectabilis Willd. | 5 images |
| Osmundastrum cinnamomeum (L.) C.Presl | 210 images |
| Ostrya virginiana (Mill.) K.Koch | 438 images |
| Oxalis corniculata L. | 10102 images |
| Oxalis dillenii Jacq. | 2791 images |
| Oxalis grandis Small | 30 images |
| Oxalis montana Raf. | 67 images |
| Oxalis stricta L. | 2935 images |
| Oxalis violacea L. | 624 images |
| Oxybasis chenopodioides (L.) S.Fuentes, Uotila & Borsch | 78 images |
| Oxybasis glauca (L.) S.Fuentes, Uotila & Borsch | 298 images |
| Oxybasis rubra (L.) S.Fuentes, Uotila & Borsch | 704 images |
| Oxybasis urbica (L.) S.Fuentes, Uotila & Borsch | 44 images |
| Oxydendrum arboreum (L.) DC. | 470 images |
| Oxypolis rigidior (L.) Raf. | 23 images |
| Oxyria digyna (L.) Hill | 469 images |
| Oxytropis campestris (L.) DC. | 664 images |
| Pachysandra procumbens Michx. | 53 images |
| Pachysandra terminalis Siebold & Zucc. | 1801 images |
| Packera anonyma (Alph.Wood) W.A.Weber & Á.Löve | 2 images |
| Packera aurea (L.) Á.Löve & D.Löve | 206 images |
| Packera dubia (Spreng.) Trock & Mabb. | 12 images |
| Packera glabella (Poir.) C.Jeffrey | 276 images |
| Packera paupercula (Michx.) Á.Löve & D.Löve | 2 images |
| Packera plattensis (Nutt.) W.A.Weber & Á.Löve | 1 images |
| Paeonia lactiflora Pall. | 4666 images |
| Paeonia officinalis L. | 11653 images |
| Palustricodon aparinoides (Pursh) Morin | 20 images |
| Panax quinquefolius L. | 130 images |
| Panax trifolius L. | 147 images |
| Panicum amarum Elliott | 11 images |
| Panicum capillare L. | 841 images |
| Panicum dichotomiflorum Michx. | 98 images |
| Panicum miliaceum L. | 1434 images |
| Panicum virgatum L. | 1198 images |
| Papaver dubium L. | 4377 images |
| Papaver orientale L. | 5018 images |
| Papaver rhoeas L. | 12656 images |
| Papaver somniferum L. | 11592 images |
| Pappophorum mucronulatum Nees | 4 images |
| Parapholis incurva (L.) C.E.Hubb. | 91 images |
| Parietaria judaica L. | 6015 images |
| Parietaria pensylvanica Muhl. ex Willd. | 233 images |
| Parnassia asarifolia Vent. | 8 images |
| Parnassia glauca Raf. | 38 images |
| Parnassia grandifolia DC. | 8 images |
| Parnassia palustris L. | 5074 images |
| Paronychia argyrocoma (Michx.) Nutt. | 18 images |
| Paronychia fastigiata (Raf.) Fernald | 3 images |
| Paronychia virginica Spreng. | 12 images |
| Parthenium hysterophorus L. | 1279 images |
| Parthenium integrifolium L. | 230 images |
| Parthenocissus quinquefolia (L.) Planch. | 18308 images |
| Parthenocissus tricuspidata (Siebold & Zucc.) Planch. | 4656 images |
| Parthenocissus vitacea (Knerr) Hitchc. | 4 images |
| Paspalum dilatatum Poir. | 1459 images |
| Paspalum distichum L. | 290 images |
| Paspalum floridanum Michx. | 5 images |
| Paspalum notatum Flüggé | 55 images |
| Paspalum repens P.J.Bergius | 168 images |
| Paspalum scrobiculatum L. | 33 images |
| Paspalum setaceum Michx. | 13 images |
| Passiflora incarnata L. | 768 images |
| Passiflora lutea L. | 323 images |
| Pastinaca sativa L. | 7683 images |
| Paulownia tomentosa (Thunb.) Steud. | 10984 images |
| Paxistima canbyi A.Gray | 11 images |
| Pedicularis canadensis L. | 213 images |
| Pedicularis furbishiae S.Watson | 2 images |
| Pedicularis lanceolata Michx. | 24 images |
| Peltandra virginica (L.) Schott | 172 images |
| Penstemon calycosus Small | 36 images |
| Penstemon canescens Britton | 50 images |
| Penstemon cobaea Nutt. | 198 images |
| Penstemon digitalis Nutt. ex Sims | 1525 images |
| Penstemon gracilis Nutt. | 21 images |
| Penstemon hirsutus (L.) Willd. | 191 images |
| Penstemon laevigatus Aiton | 9 images |
| Penstemon pallidus Small | 33 images |
| Pentaglottis sempervirens (L.) Tausch ex L.H.Bailey | 6963 images |
| Pentanema britannica (L.) D.Gut.Larr., Santos-Vicente, Anderb., E.Rico & M.M.Mart.Ort. | 1288 images |
| Pentanema salicinum (L.) D.Gut.Larr., Santos-Vicente, Anderb., E.Rico & M.M.Mart.Ort. | 1560 images |
| Penthorum sedoides L. | 62 images |
| Perilla frutescens (L.) Britton | 3017 images |
| Periploca graeca L. | 393 images |
| Persea americana Mill. | 8699 images |
| Persicaria amphibia (L.) Delarbre | 571 images |
| Persicaria careyi (Olney) Greene | 1 images |
| Persicaria chinensis (L.) H.Gross | 197 images |
| Persicaria glabra (Willd.) M.Gómez | 26 images |
| Persicaria hydropiper (L.) Delarbre | 902 images |
| Persicaria hydropiperoides (Michx.) Small | 22 images |
| Persicaria lapathifolia (L.) Delarbre | 4212 images |
| Persicaria longiseta (Bruijn) Kitag. | 11 images |
| Persicaria maculosa Gray | 10798 images |
| Persicaria minor (Huds.) Opiz | 383 images |
| Persicaria nepalensis (Meisn.) H.Gross | 50 images |
| Persicaria orientalis (L.) Spach | 3322 images |
| Persicaria pensylvanica (L.) M.Gómez | 86 images |
| Persicaria perfoliata (L.) H.Gross | 16 images |
| Persicaria punctata (Elliott) Small | 123 images |
| Persicaria sagittata (L.) H.Gross | 44 images |
| Persicaria virginiana (L.) Gaertn. | 1315 images |
| Petasites frigidus (L.) Fr. | 256 images |
| Petasites hybridus (L.) G.Gaertn., B.Mey. & Scherb. | 4900 images |
| Petrorhagia prolifera (L.) P.W.Ball & Heywood | 1539 images |
| Petrorhagia saxifraga (L.) Link | 2104 images |
| Petrosedum ochroleucum (Chaix) Niederle | 994 images |
| Petrosedum orientale ('t Hart) Grulich | 2 images |
| Petrosedum rupestre (L.) P.V.Heath | 6775 images |
| Petroselinum crispum (Mill.) Fuss | 2974 images |
| Petunia axillaris (Lam.) Britton, Sterns & Poggenb. | 113 images |
| Petunia integrifolia (Hook.) Schinz & Thell. | 171 images |
| Peucedanum ostruthium (L.) W.D.J.Koch | 1392 images |
| Peucedanum palustre (L.) Moench | 352 images |
| Phacelia bipinnatifida Michx. | 122 images |
| Phacelia brachyloba (Benth.) A.Gray | 11 images |
| Phacelia campanularia A.Gray | 265 images |
| Phacelia ciliata Benth. | 25 images |
| Phacelia distans Benth. | 156 images |
| Phacelia dubia (L.) Trel. | 5 images |
| Phacelia heterophylla Pursh | 61 images |
| Phacelia hirsuta Nutt. | 14 images |
| Phacelia linearis (Pursh) Holz. | 65 images |
| Phacelia minor (Harv.) Thell. | 1 images |
| Phacelia purshii Buckley | 113 images |
| Phacelia tanacetifolia Benth. | 17999 images |
| Phacelia viscida (Benth. ex Lindl.) Torr. | 17 images |
| Phalaris arundinacea L. | 3472 images |
| Phalaris canariensis L. | 547 images |
| Phalaris minor Retz. | 179 images |
| Phalaris paradoxa L. | 91 images |
| Phaseolus polystachios (L.) Britton, Sterns & Poggenb. | 4 images |
| Phaseolus vulgaris L. | 3120 images |
| Phedimus aizoon (L.) 't Hart | 1335 images |
| Phedimus ellacombeanus (Praeger) 't Hart | 5 images |
| Phedimus kamtschaticus (Fisch.) 't Hart | 1156 images |
| Phedimus spurius (M.Bieb.) 't Hart | 4758 images |
| Phegopteris connectilis (Michx.) Watt | 833 images |
| Phegopteris hexagonoptera (Michx.) Fée | 1 images |
| Phellodendron amurense Rupr. | 440 images |
| Phemeranthus rugospermus (Holz.) Kiger | 2 images |
| Phemeranthus teretifolius (Pursh) Raf. | 9 images |
| Philadelphus coronarius L. | 20425 images |
| Philadelphus inodorus L. | 251 images |
| Philadelphus pubescens Loisel. | 1721 images |
| Phleum alpinum L. | 389 images |
| Phleum arenarium L. | 137 images |
| Phleum paniculatum Huds. | 9 images |
| Phleum pratense L. | 3322 images |
| Phleum subulatum (Savi) Asch. & Graebn. | 6 images |
| Phlomoides tuberosa (L.) Moench | 485 images |
| Phlox amplifolia Britton | 20 images |
| Phlox buckleyi Wherry | 3 images |
| Phlox carolina L. | 52 images |
| Phlox divaricata L. | 1078 images |
| Phlox drummondii Hook. | 1619 images |
| Phlox glaberrima L. | 62 images |
| Phlox maculata L. | 2080 images |
| Phlox paniculata L. | 7224 images |
| Phlox pilosa L. | 198 images |
| Phlox stolonifera Sims | 68 images |
| Phlox subulata L. | 5407 images |
| Phoradendron leucarpum (Raf.) Reveal & M.C.Johnst. | 10 images |
| Phragmites australis (Cav.) Trin. ex Steud. | 7535 images |
| Phryma leptostachya L. | 177 images |
| Phyla cuneifolia (Torr.) Greene | 1 images |
| Phyla lanceolata (Michx.) Greene | 145 images |
| Phyla nodiflora (L.) Greene | 1886 images |
| Phyllanthus caroliniensis Walter | 25 images |
| Phyllanthus urinaria L. | 568 images |
| Phyllodoce caerulea (L.) Bab. | 203 images |
| Phyllostachys aureosulcata McClure | 385 images |
| Phyllostachys dulcis McClure | 4 images |
| Phyllostachys nigra (Lodd. ex Lindl.) Munro | 1524 images |
| Phyllostachys viridiglaucescens (Carrière) Rivière & C.Rivière | 37 images |
| Physalis grisea (Waterf.) M.Martínez | 1 images |
| Physalis heterophylla Nees | 159 images |
| Physalis longifolia Nutt. | 281 images |
| Physalis philadelphica Lam. | 824 images |
| Physalis pumila Nutt. | 10 images |
| Physalis virginiana Mill. | 3 images |
| Physocarpus opulifolius (L.) Maxim. | 5660 images |
| Physostegia virginiana (L.) Benth. | 2587 images |
| Phytolacca americana L. | 20985 images |
| Picea abies (L.) H.Karst. | 11478 images |
| Picea laxa (Münchh.) Sarg. | 2146 images |
| Picea mariana (Mill.) Britton, Sterns & Poggenb. | 82 images |
| Picea pungens Engelm. | 6216 images |
| Picea rubens Sarg. | 2325 images |
| Picris hieracioides L. | 5084 images |
| Pieris floribunda (Pursh) Benth. & Hook.f. | 20 images |
| Pieris japonica (Thunb.) D.Don ex G.Don | 3552 images |
| Pilea fontana (Lunell) Rydb. | 2 images |
| Pilea pumila A.Gray | 611 images |
| Pilosella aurantiaca (L.) F.W.Schultz & Sch.Bip. | 9583 images |
| Pilosella caespitosa (Dumort.) P.D.Sell & C.West | 407 images |
| Pilosella flagellaris (Willd.) Arv.-Touv. | 1 images |
| Pilosella floribunda (Wimm. & Grab.) Fr. | 2 images |
| Pilosella lactucella (Wallr.) P.D.Sell & C.West | 281 images |
| Pilosella officinarum Vaill. | 2999 images |
| Pilosella piloselloides (Vill.) Soják | 308 images |
| Pimpinella anisum L. | 118 images |
| Pimpinella major (L.) Huds. | 2652 images |
| Pimpinella saxifraga L. | 2396 images |
| Pinellia ternata (Thunb.) Makino | 9 images |
| Pinguicula vulgaris L. | 1490 images |
| Pinus banksiana Lamb. | 507 images |
| Pinus echinata Mill. | 151 images |
| Pinus nigra J.F.Arnold | 2828 images |
| Pinus pungens Lamb. | 59 images |
| Pinus resinosa Aiton | 1577 images |
| Pinus rigida Mill. | 448 images |
| Pinus serotina Michx. | 13 images |
| Pinus strobus L. | 4773 images |
| Pinus sylvestris L. | 12051 images |
| Pinus thunbergii Parl. | 256 images |
| Pinus virginiana Mill. | 138 images |
| Pistia stratiotes L. | 1071 images |
| Pityopsis graminifolia (Michx.) Nutt. | 67 images |
| Plagiobothrys figuratus (Piper) I.M.Johnst. | 2 images |
| Plagiobothrys scouleri (Hook. & Arn.) I.M.Johnst. | 1 images |
| Plantago aristata Michx. | 27 images |
| Plantago cordata Lam. | 16 images |
| Plantago coronopus L. | 2927 images |
| Plantago heterophylla Nutt. | 1 images |
| Plantago indica L. | 281 images |
| Plantago lanceolata L. | 14966 images |
| Plantago major L. | 11658 images |
| Plantago maritima L. | 1015 images |
| Plantago media L. | 5623 images |
| Plantago patagonica Jacq. | 59 images |
| Plantago pusilla Nutt. | 10 images |
| Plantago rugelii Decne. | 267 images |
| Plantago virginica L. | 194 images |
| Plantago wrightiana Decne. | 9 images |
| Platanthera aquilonis Sheviak | 30 images |
| Platanthera blephariglottis (Willd.) Lindl. | 39 images |
| Platanthera ciliaris (L.) Lindl. | 82 images |
| Platanthera clavellata (Michx.) Luer | 45 images |
| Platanthera cristata (Michx.) Lindl. | 5 images |
| Platanthera dilatata (Pursh) Lindl. ex L.C.Beck | 7 images |
| Platanthera flava (L.) Lindl. | 17 images |
| Platanthera grandiflora (Bigelow) Lindl. | 11 images |
| Platanthera hookeri (Torr.) Lindl. | 1 images |
| Platanthera lacera (Michx.) G.Don | 42 images |
| Platanthera leucophaea (Nutt.) Lindl. | 12 images |
| Platanthera nivea (Nutt.) Luer | 6 images |
| Platanthera obtusata (Banks ex Pursh) Lindl. | 13 images |
| Platanthera orbiculata (Pursh) Lindl. | 56 images |
| Platanthera peramoena A.Gray | 10 images |
| Platanthera psycodes (L.) Lindl. | 89 images |
| Platanus occidentalis L. | 9187 images |
| Pleopeltis michauxiana (Weath.) Hickey & Sprunt | 1 images |
| Pluchea camphorata (L.) DC. | 67 images |
| Pluchea foetida (L.) DC. | 18 images |
| Pluchea odorata (L.) Cass. | 299 images |
| Poa alpina L. | 428 images |
| Poa angustifolia L. | 5 images |
| Poa annua L. | 3311 images |
| Poa arida Vasey | 2 images |
| Poa autumnalis Muhl. ex Elliott | 3 images |
| Poa bulbosa L. | 1260 images |
| Poa chaixii Vill. | 115 images |
| Poa compressa L. | 138 images |
| Poa cuspidata Nutt. | 3 images |
| Poa glauca Vahl | 40 images |
| Poa nemoralis L. | 531 images |
| Poa palustris L. | 144 images |
| Poa pratensis L. | 3312 images |
| Poa secunda J.Presl | 9 images |
| Poa trivialis L. | 2180 images |
| Podophyllum peltatum L. | 2062 images |
| Podostemum ceratophyllum Michx. | 2 images |
| Pogonia ophioglossoides (L.) Ker Gawl. | 137 images |
| Polemonium caeruleum L. | 1705 images |
| Polemonium micranthum Benth. | 4 images |
| Polemonium reptans L. | 455 images |
| Polemonium vanbruntiae Britton | 1 images |
| Polygala cruciata L. | 9 images |
| Polygala curtissii A.Gray | 43 images |
| Polygala lutea L. | 101 images |
| Polygala mariana Mill. | 3 images |
| Polygala polygama Walter | 33 images |
| Polygala sanguinea L. | 69 images |
| Polygala senega L. | 30 images |
| Polygala verticillata L. | 5 images |
| Polygala vulgaris L. | 4544 images |
| Polygaloides paucifolia (Willd.) J.R.Abbott | 203 images |
| Polygonatum biflorum (Walter) Elliott | 841 images |
| Polygonatum latifolium (Jacq.) Desf. | 97 images |
| Polygonatum pubescens (Willd.) Pursh | 185 images |
| Polygonum arenastrum Boreau | 233 images |
| Polygonum articulatum L. | 1 images |
| Polygonum aviculare L. | 5865 images |
| Polygonum cilinode Michx. | 3 images |
| Polygonum douglasii Greene | 5 images |
| Polygonum glaucum Nutt. | 19 images |
| Polygonum raii Bab. | 83 images |
| Polygonum tenue Michx. | 3 images |
| Polymnia canadensis L. | 158 images |
| Polypodium appalachianum Haufler & Windham | 1 images |
| Polypodium virginianum L. | 313 images |
| Polypogon monspeliensis (L.) Desf. | 937 images |
| Polypogon viridis (Gouan) Breistr. | 274 images |
| Polystichum acrostichoides (Michx.) Schott | 687 images |
| Polystichum braunii (Spenn.) Fée | 206 images |
| Polystichum lonchitis (L.) Roth | 724 images |
| Polystichum munitum (Kaulf.) C.Presl | 987 images |
| Polytaenia nuttallii DC. | 16 images |
| Pombalia parviflora (L.f.) Paula-Souza | 2 images |
| Pontederia cordata L. | 1854 images |
| Pontederia crassipes Mart. | 1844 images |
| Populus × canescens (Aiton) Sm. | 2769 images |
| Populus alba L. | 13025 images |
| Populus balsamifera L. | 2014 images |
| Populus deltoides W.Bartram ex Marshall | 999 images |
| Populus grandidentata Michx. | 343 images |
| Populus heterophylla L. | 25 images |
| Populus nigra L. | 15043 images |
| Populus tremuloides Michx. | 1637 images |
| Portulaca grandiflora Hook. | 8229 images |
| Portulaca oleracea L. | 14140 images |
| Potamogeton × nitens Weber | 2 images |
| Potamogeton alpinus Balb. | 30 images |
| Potamogeton amplifolius Tuck. | 8 images |
| Potamogeton berchtoldii Fieber | 26 images |
| Potamogeton crispus L. | 194 images |
| Potamogeton diversifolius Raf. | 1 images |
| Potamogeton epihydrus Raf. | 4 images |
| Potamogeton foliosus Raf. | 5 images |
| Potamogeton friesii Rupr. | 9 images |
| Potamogeton gramineus L. | 49 images |
| Potamogeton natans L. | 693 images |
| Potamogeton nodosus Poir. | 351 images |
| Potamogeton obtusifolius Mert. & W.D.J.Koch | 17 images |
| Potamogeton perfoliatus L. | 199 images |
| Potamogeton praelongus Wulfen | 25 images |
| Potamogeton pusillus L. | 45 images |
| Potentilla anglica Laichard. | 1001 images |
| Potentilla argentea L. | 3153 images |
| Potentilla canadensis L. | 110 images |
| Potentilla concinna Richardson | 8 images |
| Potentilla erecta (L.) Raeusch. | 5418 images |
| Potentilla gracilis Douglas ex Hook. | 206 images |
| Potentilla grandiflora L. | 419 images |
| Potentilla hippiana Lehm. | 14 images |
| Potentilla inclinata Vill. | 70 images |
| Potentilla indica (Andrews) Th.Wolf | 6142 images |
| Potentilla intermedia L. | 119 images |
| Potentilla norvegica L. | 895 images |
| Potentilla recta L. | 3966 images |
| Potentilla reptans L. | 11590 images |
| Potentilla simplex Michx. | 538 images |
| Potentilla supina L. | 212 images |
| Potentilla thuringiaca Bernh. ex Link | 56 images |
| Pourthiaea villosa (Thunb.) Decne. | 86 images |
| Primula fassettii A.R.Mast & Reveal | 2 images |
| Primula japonica A.Gray | 196 images |
| Primula laurentiana Fernald | 32 images |
| Primula meadia (L.) A.R.Mast & Reveal | 290 images |
| Primula mistassinica Michx. | 4 images |
| Primula veris L. | 14410 images |
| Proboscidea louisianica (Mill.) Thell. | 278 images |
| Prosartes hookeri Torr. | 149 images |
| Prosartes lanuginosa (Michx.) D.Don | 23 images |
| Prosartes maculata (Buckley) A.Gray | 13 images |
| Prosartes trachycarpa S.Watson | 48 images |
| Proserpinaca palustris L. | 4 images |
| Proserpinaca pectinata Lam. | 2 images |
| Prunella laciniata (L.) L. | 2062 images |
| Prunella vulgaris L. | 23502 images |
| Prunus × subhirtella Miq. | 2344 images |
| Prunus americana Marshall | 91 images |
| Prunus angustifolia Marshall | 3 images |
| Prunus armeniaca L. | 6346 images |
| Prunus avium (L.) L. | 21551 images |
| Prunus cerasifera Ehrh. | 24157 images |
| Prunus cerasus L. | 12207 images |
| Prunus domestica L. | 19066 images |
| Prunus fruticosa Pall. | 215 images |
| Prunus glandulosa Thunb. | 314 images |
| Prunus incisa Thunb. | 180 images |
| Prunus insititia L. | 25 images |
| Prunus mahaleb L. | 7406 images |
| Prunus maritima Marshall | 39 images |
| Prunus mexicana S.Watson | 18 images |
| Prunus nigra Aiton | 6 images |
| Prunus padus L. | 14769 images |
| Prunus pensylvanica L.f. | 652 images |
| Prunus persica (L.) Batsch | 11500 images |
| Prunus pumila L. | 43 images |
| Prunus rivularis Scheele | 31 images |
| Prunus sargentii Rehder | 153 images |
| Prunus serotina Ehrh. | 9622 images |
| Prunus speciosa (Koidz.) Nakai | 4 images |
| Prunus spinosa L. | 32749 images |
| Prunus susquehanae Willd. | 6 images |
| Prunus tomentosa Thunb. | 434 images |
| Prunus umbellata Elliott | 47 images |
| Prunus virginiana L. | 3798 images |
| Psammophiliella muralis (L.) Ikonn. | 667 images |
| Pseudo-fumaria lutea (L.) Borkh. | 135 images |
| Pseudognaphalium luteoalbum (L.) Hilliard & B.L.Burtt | 1451 images |
| Pseudognaphalium obtusifolium (L.) Hilliard & B.L.Burtt | 106 images |
| Pseudognaphalium stramineum (Kunth) Anderb. | 121 images |
| Pseudosasa japonica (Siebold & Zucc. ex Steud.) Makino ex Nakai | 117 images |
| Pseudotsuga menziesii (Mirb.) Franco | 5167 images |
| Ptelea trifoliata L. | 562 images |
| Pteris multifida Poir. | 24 images |
| Pterospora andromedea Nutt. | 273 images |
| Puccinellia distans (Jacq.) Parl. | 107 images |
| Puccinellia fasciculata (Torr.) E.P.Bicknell | 13 images |
| Puccinellia maritima (Huds.) Parl. | 61 images |
| Puccinellia rupestris (With.) Fernald & Weath. | 3 images |
| Pueraria montana (Lour.) Merr. | 488 images |
| Pulicaria dysenterica (L.) Bernh. | 5595 images |
| Pulmonaria officinalis L. | 4090 images |
| Pulmonaria saccharata Mill. | 2576 images |
| Pycnanthemum incanum (L.) Michx. | 130 images |
| Pycnanthemum muticum (Michx.) Pers. | 179 images |
| Pycnanthemum pycnanthemoides (Leavenw.) Fernald | 5 images |
| Pycnanthemum tenuifolium Schrad. | 343 images |
| Pycnanthemum verticillatum (Michx.) Pers. | 106 images |
| Pycnanthemum virginianum (L.) T.Durand & B.D.Jacks. ex B.L.Rob. & Fernald | 20 images |
| Pyracantha coccinea M.Roem. | 16689 images |
| Pyrola americana G.Don | 33 images |
| Pyrola asarifolia Michx. | 134 images |
| Pyrola chlorantha Sw. | 392 images |
| Pyrola elliptica Nutt. | 176 images |
| Pyrola minor L. | 734 images |
| Pyrrhopappus carolinianus (Walter) DC. | 301 images |
| Pyrus calleryana Decne. | 5490 images |
| Pyrus communis L. | 11463 images |
| Pyrus cordata Desv. | 2111 images |
| Pyrus pyrifolia (Burm.f.) Nakai | 592 images |
| Pyxidanthera barbulata Michx. | 5 images |
| Quercus × benderi Baen. | 3 images |
| Quercus × bimundorum E.J.Palmer | 8 images |
| Quercus × heterophylla F.Michx. | 8 images |
| Quercus × leana Nutt. | 6 images |
| Quercus acutissima Carruth. | 349 images |
| Quercus alba L. | 1015 images |
| Quercus bicolor Willd. | 936 images |
| Quercus cerris L. | 4919 images |
| Quercus coccinea Münchh. | 193 images |
| Quercus ellipsoidalis E.J.Hill | 21 images |
| Quercus falcata Michx. | 91 images |
| Quercus ilicifolia Wangenh. | 75 images |
| Quercus imbricaria Michx. | 305 images |
| Quercus lyrata Walter | 23 images |
| Quercus macrocarpa Michx. | 1580 images |
| Quercus marilandica (L.) Münchh. | 110 images |
| Quercus michauxii Nutt. | 235 images |
| Quercus montana Willd. | 21 images |
| Quercus muehlenbergii Engelm. | 124 images |
| Quercus nigra L. | 1233 images |
| Quercus pagoda Raf. | 9 images |
| Quercus palustris Münchh. | 4591 images |
| Quercus phellos L. | 973 images |
| Quercus prinoides Willd. | 4 images |
| Quercus robur L. | 19208 images |
| Quercus rubra L. | 12752 images |
| Quercus shumardii Buckley | 117 images |
| Quercus stellata Wangenh. | 170 images |
| Quercus velutina Lam. | 2097 images |
| Rabelera holostea (L.) M.T.Sharples & E.A.Tripp | 11485 images |
| Radiola linoides Roth | 137 images |
| Ranunculus abortivus L. | 538 images |
| Ranunculus acris L. | 12855 images |
| Ranunculus ambigens S.Watson | 5 images |
| Ranunculus arvensis L. | 485 images |
| Ranunculus bulbosus L. | 5294 images |
| Ranunculus fascicularis Muhl. ex Bigelow | 74 images |
| Ranunculus ficaria L. | 31291 images |
| Ranunculus flabellaris Raf. | 12 images |
| Ranunculus flammula L. | 2231 images |
| Ranunculus gmelinii DC. | 4 images |
| Ranunculus hederaceus L. | 179 images |
| Ranunculus hispidus Michx. | 232 images |
| Ranunculus laxicaulis (Torr. & A.Gray) Darby | 1 images |
| Ranunculus macounii Britton | 11 images |
| Ranunculus micranthus Nutt. | 14 images |
| Ranunculus minimus (L.) E.H.L.Krause | 191 images |
| Ranunculus muricatus L. | 1114 images |
| Ranunculus parviflorus Loefl. | 7 images |
| Ranunculus pensylvanicus L.f. | 2 images |
| Ranunculus pusillus Poir. | 5 images |
| Ranunculus recurvatus Poir. | 257 images |
| Ranunculus repens L. | 15937 images |
| Ranunculus reptans L. | 11 images |
| Ranunculus sardous Crantz | 1078 images |
| Ranunculus sceleratus L. | 1573 images |
| Ranunculus trichophyllus Chaix | 562 images |
| Raphanus raphanistrum L. | 15067 images |
| Rapistrum rugosum (L.) All. | 3412 images |
| Ratibida columnifera (Nutt.) Wooton & Standl. | 532 images |
| Ratibida pinnata (Vent.) Barnhart | 402 images |
| Regnellidium diphyllum Lindm. | 3 images |
| Reseda alba L. | 2096 images |
| Reseda lutea L. | 6758 images |
| Reseda luteola L. | 3414 images |
| Reseda odorata L. | 78 images |
| Reynoutria × bohemica Chrtek & Chrtková | 177 images |
| Reynoutria japonica Houtt. | 11891 images |
| Reynoutria sachalinensis (F.Schmidt) Nakai | 2947 images |
| Rhamnus cathartica L. | 6168 images |
| Rhamnus davurica Pall. | 1 images |
| Rhamnus utilis Decne. | 8 images |
| Rhamphospermum arvense (L.) Andrz. ex Besser | 10768 images |
| Rhamphospermum nigrum (L.) Al-Shehbaz | 1023 images |
| Rheum rhabarbarum L. | 656 images |
| Rhexia mariana L. | 221 images |
| Rhexia virginica L. | 135 images |
| Rhinanthus major L. | 1121 images |
| Rhinanthus minor L. | 3283 images |
| Rhodiola integrifolia Raf. | 82 images |
| Rhodiola rosea L. | 981 images |
| Rhododendron arborescens (Pursh) Torr. | 117 images |
| Rhododendron atlanticum (Ashe) Rehder | 37 images |
| Rhododendron calendulaceum (Michx.) Torr. | 3412 images |
| Rhododendron canadense (L.) Torr. | 133 images |
| Rhododendron catawbiense Michx. | 2407 images |
| Rhododendron groenlandicum (Oeder) Kron & Judd | 81 images |
| Rhododendron japonicum (A.Gray) Suringar | 163 images |
| Rhododendron lapponicum (L.) Wahlenb. | 314 images |
| Rhododendron maximum L. | 6899 images |
| Rhododendron periclymenoides (Michx.) Shinners | 274 images |
| Rhododendron pilosum (Michx. ex Lam.) Craven | 2 images |
| Rhododendron roseum (Loisel.) Rehder | 428 images |
| Rhododendron viscosum (L.) Torr. | 161 images |
| Rhodotypos scandens (Thunb.) Makino | 893 images |
| Rhus aromatica Aiton | 763 images |
| Rhus copallinum L. | 1043 images |
| Rhus glabra L. | 2274 images |
| Rhus typhina L. | 11903 images |
| Rhynchospora alba (L.) Vahl | 232 images |
| Rhynchospora capitellata (Michx.) Vahl | 4 images |
| Rhynchospora corniculata (Lam.) A.Gray | 1 images |
| Rhynchospora fusca (L.) W.T.Aiton | 58 images |
| Rhynchospora glomerata (L.) Vahl | 1 images |
| Ribes americanum Mill. | 125 images |
| Ribes aureum Pursh | 1894 images |
| Ribes cynosbati L. | 331 images |
| Ribes glandulosum Weber | 17 images |
| Ribes hirtellum Michx. | 9 images |
| Ribes hudsonianum Richardson | 6 images |
| Ribes lacustre (Pers.) Poir. | 113 images |
| Ribes missouriense Nutt. | 85 images |
| Ribes nigrum L. | 3382 images |
| Ribes oxyacanthoides L. | 2 images |
| Ribes rubrum L. | 6083 images |
| Ribes triste Pall. | 15 images |
| Ribes uva-crispa L. | 3566 images |
| Richardia brasiliensis Gomes | 274 images |
| Richardia scabra L. | 672 images |
| Ricinus communis L. | 12810 images |
| Ripariosida hermaphrodita (L.) Weakley & D.B.Poind. | 74 images |
| Robinia × ambigua Poir. | 8 images |
| Robinia × margaretiae Ashe | 3 images |
| Robinia hispida L. | 1734 images |
| Robinia pseudoacacia L. | 24019 images |
| Robinia viscosa Michx. ex Vent. | 2998 images |
| Roemeria argemone (L.) C.Morales, R.Mend. & Romero García | 1483 images |
| Roemeria sicula (Guss.) ined. | 974 images |
| Rorippa × anceps (Wahlenb.) Rchb. | 10 images |
| Rorippa amphibia (L.) Besser | 1539 images |
| Rorippa aquatica (Eaton) E.J.Palmer & Steyerm. | 1 images |
| Rorippa austriaca (Crantz) Besser | 200 images |
| Rorippa curvipes Greene | 10 images |
| Rorippa indica (L.) Hiern | 1 images |
| Rorippa palustris (L.) Besser | 1176 images |
| Rorippa sylvestris (L.) Besser | 2497 images |
| Rosa acicularis Lindl. | 30 images |
| Rosa arkansana Porter | 109 images |
| Rosa blanda Aiton | 65 images |
| Rosa canina L. | 22317 images |
| Rosa carolina L. | 57 images |
| Rosa gallica L. | 12061 images |
| Rosa glauca Pourr. | 1031 images |
| Rosa lucieae Franch. & Rochebr. ex Crép. | 3694 images |
| Rosa majalis Herrm. | 67 images |
| Rosa micrantha Borrer ex Sm. | 1385 images |
| Rosa mollis Sm. | 62 images |
| Rosa multiflora Thunb. | 6213 images |
| Rosa nitida Willd. | 7 images |
| Rosa palustris Marshall | 75 images |
| Rosa pendulina L. | 9072 images |
| Rosa rubiginosa L. | 5003 images |
| Rosa rugosa Thunb. | 11161 images |
| Rosa setigera Michx. | 519 images |
| Rosa sherardii Davies | 103 images |
| Rosa spinosissima L. | 4846 images |
| Rosa tomentosa Sm. | 270 images |
| Rosa villosa L. | 1722 images |
| Rosa virginiana Mill. | 176 images |
| Rostraria cristata (L.) Tzvelev | 723 images |
| Rotala ramosior (L.) Koehne | 9 images |
| Rottboellia cochinchinensis (Lour.) Clayton | 32 images |
| Rubia tinctorum L. | 1001 images |
| Rubus × trux Ashe | 1 images |
| Rubus allegheniensis Porter | 75 images |
| Rubus arcticus L. | 126 images |
| Rubus argutus Link | 2506 images |
| Rubus bifrons Vest | 3 images |
| Rubus caesius L. | 7604 images |
| Rubus canadensis L. | 309 images |
| Rubus chamaemorus L. | 488 images |
| Rubus cuneifolius Pursh | 1 images |
| Rubus flagellaris Willd. | 48 images |
| Rubus hispidus L. | 132 images |
| Rubus idaeus L. | 8014 images |
| Rubus illecebrosus Focke | 86 images |
| Rubus nemoralis P.J.Müll. | 1228 images |
| Rubus occidentalis L. | 3776 images |
| Rubus odoratus L. | 1744 images |
| Rubus parvifolius L. | 14 images |
| Rubus pensilvanicus Poir. | 48 images |
| Rubus phoenicolasius Maxim. | 2069 images |
| Rubus pubescens Raf. | 169 images |
| Rubus setosus Bigelow | 8 images |
| Rubus ulmifolius Schott | 12521 images |
| Rudbeckia fulgida Aiton | 8427 images |
| Rudbeckia grandiflora (Sweet) C.C.Gmel. ex DC. | 4 images |
| Rudbeckia hirta L. | 6158 images |
| Rudbeckia laciniata L. | 3008 images |
| Rudbeckia subtomentosa Pursh | 148 images |
| Rudbeckia triloba L. | 1514 images |
| Ruellia caroliniensis (J.F.Gmel.) Steud. | 8 images |
| Ruellia humilis Nutt. | 649 images |
| Ruellia pedunculata Torr. ex A.Gray | 37 images |
| Ruellia purshiana Fernald | 2 images |
| Ruellia strepens L. | 145 images |
| Rumex × acutus L. | 2211 images |
| Rumex acetosa L. | 7263 images |
| Rumex acetosella L. | 5813 images |
| Rumex alpinus L. | 1816 images |
| Rumex altissimus Alph.Wood | 13 images |
| Rumex conglomeratus Murray | 3362 images |
| Rumex crispus L. | 10550 images |
| Rumex longifolius DC. | 1694 images |
| Rumex maritimus L. | 105 images |
| Rumex obtusifolius L. | 13718 images |
| Rumex occidentalis S.Watson | 4 images |
| Rumex pallidus Bigelow | 4 images |
| Rumex palustris Sm. | 215 images |
| Rumex patientia L. | 3461 images |
| Rumex pulcher L. | 2570 images |
| Rumex sanguineus L. | 1722 images |
| Rumex spinosus L. | 415 images |
| Rumex thyrsiflorus Fingerh. | 393 images |
| Rumex verticillatus L. | 31 images |
| Ruppia cirrhosa (Petagna) Grande | 36 images |
| Ruppia maritima L. | 29 images |
| Ruta graveolens L. | 3667 images |
| Sabatia angularis (L.) Pursh | 182 images |
| Sabatia campanulata (L.) Torr. | 2 images |
| Sabatia campestris Nutt. | 143 images |
| Sabatia difformis (L.) Druce | 1 images |
| Sabatia kennedyana Fernald | 1 images |
| Sabatia stellaris Pursh | 20 images |
| Sabulina michauxii (Fenzl) Dillenb. & Kadereit | 7 images |
| Sabulina rubella (Wahlenb.) Dillenb. & Kadereit | 2 images |
| Sacciolepis striata (L.) Nash | 3 images |
| Sagina japonica (Sw.) Ohwi | 5 images |
| Sagina nodosa (L.) Fenzl | 168 images |
| Sagina procumbens L. | 1097 images |
| Sagittaria graminea Michx. | 85 images |
| Sagittaria latifolia Willd. | 824 images |
| Sagittaria montevidensis Cham. & Schltdl. | 176 images |
| Sagittaria rigida Pursh | 9 images |
| Sagittaria subulata (L.) Buchenau | 10 images |
| Salicornia bigelovii Torr. | 32 images |
| Salicornia rubra A.Nelson | 18 images |
| Salicornia virginica L. | 11 images |
| Salix × fragilis L. | 98 images |
| Salix × hermaphroditica L. | 4 images |
| Salix × pendulina Wender. | 851 images |
| Salix alba L. | 11101 images |
| Salix amygdaloides Andersson | 33 images |
| Salix atrocinerea Brot. | 4333 images |
| Salix aurita L. | 3095 images |
| Salix babylonica L. | 6878 images |
| Salix bebbiana Sarg. | 48 images |
| Salix candida Flüggé ex Willd. | 7 images |
| Salix caprea L. | 13276 images |
| Salix caroliniana Michx. | 43 images |
| Salix cinerea L. | 6427 images |
| Salix daphnoides Vill. | 174 images |
| Salix discolor Muhl. | 486 images |
| Salix eleagnos Scop. | 3148 images |
| Salix eriocephala Michx. | 103 images |
| Salix herbacea L. | 389 images |
| Salix humilis Marshall | 20 images |
| Salix interior Rowlee | 8 images |
| Salix lucida Muhl. | 79 images |
| Salix myricoides Muhl. | 1 images |
| Salix nigra Marshall | 182 images |
| Salix pentandra L. | 1374 images |
| Salix planifolia Pursh | 9 images |
| Salix purpurea L. | 3663 images |
| Salix pyrifolia Andersson | 2 images |
| Salix sericea Marshall | 11 images |
| Salix triandra L. | 2274 images |
| Salix uva-ursi Pursh | 8 images |
| Salix viminalis L. | 2240 images |
| Salsola collina Pall. | 1 images |
| Salsola kali L. | 612 images |
| Salsola tragus L. | 68 images |
| Salvia × sylvestris L. | 1623 images |
| Salvia azurea Michx. ex Vahl | 103 images |
| Salvia coccinea Buc'hoz ex Etl. | 1006 images |
| Salvia farinacea Benth. | 5871 images |
| Salvia glutinosa L. | 3053 images |
| Salvia lyrata L. | 866 images |
| Salvia nemorosa L. | 4689 images |
| Salvia nutans L. | 48 images |
| Salvia officinalis L. | 12649 images |
| Salvia pratensis L. | 17394 images |
| Salvia reflexa Hornem. | 34 images |
| Salvia sclarea L. | 4489 images |
| Salvia verbenaca L. | 6371 images |
| Salvia verticillata L. | 2148 images |
| Salvinia minima Baker | 70 images |
| Salvinia molesta D.Mitch. | 47 images |
| Salvinia natans (L.) All. | 210 images |
| Sambucus canadensis L. | 5907 images |
| Sambucus ebulus L. | 10450 images |
| Sambucus nigra L. | 29973 images |
| Sambucus racemosa L. | 9682 images |
| Samolus parviflorus Raf. | 2 images |
| Sanguinaria canadensis L. | 1704 images |
| Sanguisorba canadensis L. | 200 images |
| Sanguisorba minor Scop. | 9346 images |
| Sanguisorba officinalis L. | 3927 images |
| Sanicula canadensis L. | 525 images |
| Sanicula marilandica L. | 33 images |
| Sanicula odorata (Raf.) Pryer & Phillippe | 1 images |
| Sanicula trifoliata E.P.Bicknell | 1 images |
| Santolina chamaecyparissus L. | 7415 images |
| Saponaria ocymoides L. | 6756 images |
| Saponaria officinalis L. | 18316 images |
| Sarracenia purpurea L. | 1364 images |
| Sassafras albidum (Nutt.) Nees | 1707 images |
| Satureja hortensis L. | 1526 images |
| Saururus cernuus L. | 410 images |
| Saxifraga aizoides L. | 2450 images |
| Saxifraga cernua L. | 32 images |
| Saxifraga cespitosa L. | 107 images |
| Saxifraga oppositifolia L. | 1193 images |
| Saxifraga paniculata Mill. | 2955 images |
| Saxifraga rivularis L. | 17 images |
| Saxifraga tricuspidata Rottb. | 19 images |
| Scabiosa atropurpurea L. | 6133 images |
| Scabiosa columbaria L. | 7693 images |
| Scabiosa ochroleuca L. | 1618 images |
| Scandix pecten-veneris L. | 2914 images |
| Scandosorbus intermedia (Ehrh.) Sennikov | 4581 images |
| Schenkia spicata (L.) G.Mans. | 4 images |
| Scheuchzeria palustris L. | 128 images |
| Schizachyrium scoparium (Michx.) Nash | 95 images |
| Schizanthus pinnatus Ruiz & Pav. | 262 images |
| Schkuhria pinnata (Lam.) Kuntze ex Thell. | 69 images |
| Schoenoplectiella hallii (A.Gray) Lye | 1 images |
| Schoenoplectiella mucronata (L.) J.Jung & H.K.Choi | 39 images |
| Schoenoplectiella purshiana (Fernald) Lye | 4 images |
| Schoenoplectus pungens (Vahl) Palla | 70 images |
| Schoenoplectus tabernaemontani (C.C.Gmel.) Palla | 91 images |
| Scilla bifolia L. | 5423 images |
| Scilla forbesii (Baker) Speta | 137 images |
| Scilla luciliae (Boiss.) Speta | 3988 images |
| Scilla siberica Andrews | 2432 images |
| Scirpoides holoschoenus (L.) Soják | 1557 images |
| Scirpus atrovirens Willd. | 217 images |
| Scirpus cyperinus (L.) Kunth | 156 images |
| Scirpus expansus Fernald | 3 images |
| Scirpus hattorianus Makino | 12 images |
| Scirpus microcarpus J.Presl & C.Presl | 4 images |
| Scirpus pendulus Muhl. | 32 images |
| Scirpus polyphyllus Vahl | 5 images |
| Scleranthus annuus L. | 323 images |
| Scleranthus perennis L. | 608 images |
| Sclerochloa dura (L.) P.Beauv. | 64 images |
| Scolymus hispanicus L. | 4038 images |
| Scorzoneroides autumnalis (L.) Moench | 3461 images |
| Scrophularia auriculata L. | 3332 images |
| Scrophularia canina L. | 1345 images |
| Scrophularia lanceolata Pursh | 19 images |
| Scrophularia marilandica L. | 59 images |
| Scrophularia nodosa L. | 4739 images |
| Scutellaria altissima L. | 493 images |
| Scutellaria galericulata L. | 1517 images |
| Scutellaria incana Biehler | 105 images |
| Scutellaria integrifolia L. | 97 images |
| Scutellaria lateriflora L. | 111 images |
| Scutellaria nervosa Pursh | 1 images |
| Scutellaria ovata Hill | 81 images |
| Scutellaria parvula Michx. | 34 images |
| Scutellaria saxatilis Riddell | 1 images |
| Scutellaria serrata Andrews | 26 images |
| Secale cereale L. | 3668 images |
| Sedum acre L. | 8176 images |
| Sedum album L. | 11030 images |
| Sedum glaucophyllum R.T.Clausen | 53 images |
| Sedum hispanicum L. | 1484 images |
| Sedum pulchellum Michx. | 50 images |
| Sedum sarmentosum Bunge | 875 images |
| Sedum sexangulare L. | 2455 images |
| Sedum ternatum Michx. | 367 images |
| Selaginella apoda (L.) Spring | 20 images |
| Selaginella selaginoides (L.) P.Beauv. ex Schrank & Mart. | 173 images |
| Selinum carvifolium (L.) L. | 277 images |
| Sempervivum tectorum L. | 12213 images |
| Senecio eremophilus Richardson | 2 images |
| Senecio sylvaticus L. | 2513 images |
| Senecio viscosus L. | 901 images |
| Senecio vulgaris L. | 9832 images |
| Senna hebecarpa (Fernald) H.S.Irwin & Barneby | 20 images |
| Senna marilandica (L.) Link | 243 images |
| Senna obtusifolia (L.) H.S.Irwin & Barneby | 534 images |
| Sericocarpus asteroides (L.) Britton, Sterns & Poggenb. | 20 images |
| Sericocarpus linifolius Britton, Sterns & Poggenb. | 5 images |
| Sesamum indicum L. | 446 images |
| Sesuvium maritimum (Walter) Britton, Sterns & Poggenb. | 1 images |
| Sesuvium portulacastrum (L.) L. | 985 images |
| Setaria adhaerens (Forssk.) Chiov. | 14 images |
| Setaria faberi R.A.W.Herrm. | 34 images |
| Setaria italica (L.) P.Beauv. | 1629 images |
| Setaria magna Griseb. | 4 images |
| Setaria parviflora (Poir.) Kerguélen | 213 images |
| Setaria pumila (Poir.) Roem. & Schult. | 3418 images |
| Setaria verticillata (L.) P.Beauv. | 1601 images |
| Setaria viridis (L.) P.Beauv. | 273 images |
| Shepherdia argentea (Pursh) Nutt. | 63 images |
| Shepherdia canadensis (L.) Nutt. | 180 images |
| Sherardia arvensis L. | 4408 images |
| Sibbaldia procumbens L. | 203 images |
| Sibbaldia tridentata (Aiton) Paule & Soják | 63 images |
| Sicyos angulatus L. | 466 images |
| Sida spinosa L. | 181 images |
| Sidalcea oregana (Nutt.) A.Gray | 4 images |
| Sideroxylon lycioides L. | 17 images |
| Sigesbeckia orientalis L. | 252 images |
| Silene × hampeana Meusel & K.Werner | 299 images |
| Silene acaulis (L.) Jacq. | 3221 images |
| Silene antirrhina L. | 15 images |
| Silene caroliniana Walter | 27 images |
| Silene chalcedonica (L.) E.H.L.Krause | 1254 images |
| Silene conica L. | 600 images |
| Silene coronaria (L.) Clairv. | 7379 images |
| Silene csereii Baumg. | 4 images |
| Silene dichotoma Ehrh. | 1688 images |
| Silene dioica (L.) Clairv. | 18702 images |
| Silene flos-cuculi (L.) Greuter & Burdet | 8014 images |
| Silene gallica L. | 1888 images |
| Silene latifolia Poir. | 20700 images |
| Silene noctiflora L. | 2284 images |
| Silene nutans L. | 3586 images |
| Silene pendula L. | 2267 images |
| Silene regia Sims | 102 images |
| Silene rotundifolia Nutt. | 4 images |
| Silene stellata (L.) Coyte | 134 images |
| Silene virginica L. | 333 images |
| Silene vulgaris (Moench) Garcke | 16773 images |
| Silphium asteriscus L. | 88 images |
| Silphium integrifolium Michx. | 136 images |
| Silphium laciniatum L. | 262 images |
| Silphium perfoliatum L. | 1702 images |
| Silphium terebinthinaceum Jacq. | 237 images |
| Silybum marianum (L.) Gaertn. | 9968 images |
| Sinapis alba L. | 7036 images |
| Sisymbrium altissimum L. | 381 images |
| Sisymbrium irio L. | 2589 images |
| Sisymbrium loeselii L. | 1650 images |
| Sisymbrium officinale (L.) Scop. | 6289 images |
| Sisymbrium orientale L. | 351 images |
| Sisymbrium polyceratium L. | 10 images |
| Sisyrinchium albidum Raf. | 42 images |
| Sisyrinchium angustifolium Mill. | 1056 images |
| Sisyrinchium montanum Greene | 177 images |
| Sisyrinchium mucronatum Michx. | 5 images |
| Sium suave Walter | 71 images |
| Smallanthus uvedalia (L.) Mack. | 98 images |
| Smilax bona-nox L. | 844 images |
| Smilax ecirrhata (Engelm. ex Kunth) S.Watson | 2 images |
| Smilax glauca Walter | 69 images |
| Smilax herbacea L. | 238 images |
| Smilax lasioneura Hook. | 13 images |
| Smilax rotundifolia L. | 969 images |
| Smilax tamnoides L. | 206 images |
| Solanum aculeatissimum Jacq. | 22 images |
| Solanum alatum Moench | 3 images |
| Solanum americanum Mill. | 6378 images |
| Solanum angustifolium Mill. | 1 images |
| Solanum carolinense L. | 1809 images |
| Solanum citrullifolium A.Braun | 21 images |
| Solanum dulcamara L. | 16271 images |
| Solanum elaeagnifolium Cav. | 1835 images |
| Solanum jamesii Torr. | 1 images |
| Solanum lycopersicum L. | 18553 images |
| Solanum nigrum L. | 14417 images |
| Solanum nitidibaccatum Bitter | 4 images |
| Solanum pseudocapsicum L. | 3593 images |
| Solanum rostratum Dunal | 596 images |
| Solanum sarrachoides Sendtn. | 5 images |
| Solanum scabrum Mill. | 103 images |
| Solanum sisymbriifolium Lam. | 1122 images |
| Solanum triflorum Nutt. | 76 images |
| Solanum tuberosum L. | 9332 images |
| Solanum villosum Mill. | 2746 images |
| Solidago altissima L. | 988 images |
| Solidago arguta Aiton | 10 images |
| Solidago bicolor L. | 140 images |
| Solidago caesia L. | 522 images |
| Solidago canadensis L. | 14888 images |
| Solidago erecta Banks ex Pursh | 8 images |
| Solidago fistulosa Mill. | 10 images |
| Solidago flexicaulis L. | 410 images |
| Solidago gigantea Aiton | 7734 images |
| Solidago hispida Muhl. ex Willd. | 33 images |
| Solidago juncea Aiton | 691 images |
| Solidago latissimifolia Mill. | 2 images |
| Solidago macrophylla Banks ex Pursh | 6 images |
| Solidago missouriensis Nutt. | 36 images |
| Solidago nemoralis Aiton | 194 images |
| Solidago odora Aiton | 72 images |
| Solidago ohioensis Riddell | 7 images |
| Solidago patula Muhl. ex Willd. | 23 images |
| Solidago ptarmicoides (Torr. & A.Gray) B.Boivin | 20 images |
| Solidago puberula Nutt. | 37 images |
| Solidago rigida L. | 232 images |
| Solidago rugosa Mill. | 1630 images |
| Solidago sempervirens L. | 105 images |
| Solidago simplex Kunth | 28 images |
| Solidago speciosa Nutt. | 132 images |
| Solidago sphacelata Raf. | 3 images |
| Solidago squarrosa Nutt. | 15 images |
| Solidago stricta Aiton | 8 images |
| Solidago uliginosa Nutt. | 34 images |
| Solidago ulmifolia Muhl. ex Willd. | 88 images |
| Sonchus arvensis L. | 6067 images |
| Sonchus asper (L.) Hill | 14693 images |
| Sonchus oleraceus L. | 14965 images |
| Sonchus tenerrimus L. | 5321 images |
| Sorbaria sorbifolia (L.) A.Braun | 3326 images |
| Sorbus americana Marshall | 290 images |
| Sorbus aucuparia L. | 21411 images |
| Sorbus decora (Sarg.) C.K.Schneid. | 19 images |
| Sorghastrum nutans (L.) Nash | 196 images |
| Sorghum × drummondii (Nees ex Steud.) Millsp. & Chase | 3 images |
| Sorghum bicolor (L.) Moench | 2563 images |
| Sorghum halepense (L.) Pers. | 3489 images |
| Sparganium americanum Nutt. | 39 images |
| Sparganium androcladum (Engelm.) Morong | 3 images |
| Sparganium angustifolium Michx. | 278 images |
| Sparganium emersum Rehmann | 207 images |
| Sparganium eurycarpum Engelm. | 51 images |
| Sparganium natans L. | 51 images |
| Spergula arvensis L. | 1263 images |
| Spergula morisonii Boreau | 168 images |
| Spergula pentandra L. | 56 images |
| Spergularia canadensis (Pers.) G.Don | 1 images |
| Spergularia diandra (Guss.) Heldr. | 43 images |
| Spergularia marina (L.) Besser | 729 images |
| Spergularia media (L.) C.Presl | 367 images |
| Spergularia rubra (L.) J.Presl & C.Presl | 1634 images |
| Spermacoce glabra Michx. | 32 images |
| Sphenopholis intermedia (Rydb.) Rydb. | 9 images |
| Sphenopholis obtusata (Michx.) Scribn. | 9 images |
| Spigelia marilandica (L.) L. | 206 images |
| Spinacia oleracea L. | 1798 images |
| Spiraea alba Du Roi | 2428 images |
| Spiraea cantoniensis Lour. | 2215 images |
| Spiraea chamaedryfolia L. | 2675 images |
| Spiraea corymbosa Raf. | 2 images |
| Spiraea japonica L.f. | 13261 images |
| Spiraea prunifolia Siebold & Zucc. | 292 images |
| Spiraea salicifolia L. | 662 images |
| Spiraea thunbergii Siebold ex Blume | 2277 images |
| Spiraea tomentosa L. | 872 images |
| Spiraea trilobata L. | 2345 images |
| Spiranthes cernua (L.) Rich. | 173 images |
| Spiranthes lacera (Raf.) Raf. | 70 images |
| Spiranthes lucida (H.H.Eaton) Ames | 12 images |
| Spiranthes magnicamporum Sheviak | 27 images |
| Spiranthes ochroleuca (Rydb.) Rydb. | 6 images |
| Spiranthes ovalis Lindl. | 31 images |
| Spiranthes praecox (Walter) S.Watson | 6 images |
| Spiranthes romanzoffiana Cham. | 102 images |
| Spiranthes tuberosa Raf. | 3 images |
| Spiranthes vernalis Engelm. & A.Gray | 62 images |
| Spirobassia hirsuta (L.) Freitag & G.Kadereit | 15 images |
| Spirodela oligorrhiza (Kurz) Hegelm. | 1 images |
| Spirodela polyrhiza (L.) Schleid. | 213 images |
| Sporobolus airoides (Torr.) Torr. | 28 images |
| Sporobolus alopecuroides (Piller & Mitterp.) P.M.Peterson | 55 images |
| Sporobolus alterniflorus (Loisel.) P.M.Peterson & Saarela | 85 images |
| Sporobolus cryptandrus (Torr.) A.Gray | 9 images |
| Sporobolus cynosuroides (L.) P.M.Peterson & Saarela | 1 images |
| Sporobolus heterolepis (A.Gray) A.Gray | 16 images |
| Sporobolus indicus (L.) R.Br. | 488 images |
| Sporobolus michauxianus (Hitchc.) P.M.Peterson & Saarela | 83 images |
| Sporobolus neglectus Nash | 2 images |
| Sporobolus pumilus (Roth) P.M.Peterson & Saarela | 58 images |
| Sporobolus pyramidatus (Lam.) Hitchc. | 4 images |
| Sporobolus rigidus (Buckley) P.M.Peterson | 7 images |
| Sporobolus schoenoides (L.) P.M.Peterson | 88 images |
| Sporobolus vaginiflorus (Torr. ex A.Gray) Alph.Wood | 8 images |
| Stachys annua (L.) L. | 599 images |
| Stachys arvensis (L.) L. | 650 images |
| Stachys byzantina K.Koch | 8732 images |
| Stachys clingmanii Small | 6 images |
| Stachys germanica L. | 1702 images |
| Stachys ocymastrum (L.) Briq. | 609 images |
| Stachys palustris L. | 6033 images |
| Stachys pilosa Nutt. | 18 images |
| Stachys recta L. | 4018 images |
| Stachys sylvatica L. | 11566 images |
| Stachys tenuifolia Willd. | 18 images |
| Stapfochloa ciliata (Sw.) P.M.Peterson | 3 images |
| Staphylea trifolia L. | 316 images |
| Stellaria alsine Grimm | 284 images |
| Stellaria apetala Ucria | 182 images |
| Stellaria aquatica (L.) Scop. | 1772 images |
| Stellaria borealis Bigelow | 3 images |
| Stellaria crassifolia Ehrh. | 20 images |
| Stellaria graminea L. | 4981 images |
| Stellaria longifolia Muhl. ex Willd. | 15 images |
| Stellaria longipes Goldie | 26 images |
| Stellaria media (L.) Vill. | 13142 images |
| Stellaria neglecta (Lej.) Weihe | 2 images |
| Stellaria pubera Michx. | 259 images |
| Stenanthium gramineum (Ker Gawl.) Morong | 22 images |
| Stenaria nigricans (Lam.) Terrell | 110 images |
| Stephanomeria exigua Nutt. | 22 images |
| Streptopus amplexifolius (L.) DC. | 622 images |
| Streptopus lanceolatus (Aiton) Reveal | 112 images |
| Strigosella africana (L.) Botsch. | 170 images |
| Strophostyles helvola (L.) Elliott | 102 images |
| Stuckenia filiformis (Pers.) Börner | 5 images |
| Stuckenia pectinata (L.) Börner | 156 images |
| Stylophorum diphyllum (Michx.) Nutt. | 468 images |
| Styphnolobium japonicum (L.) Schott | 9793 images |
| Styrax americanus Lam. | 25 images |
| Styrax grandifolius Aiton | 3 images |
| Styrax japonicus Siebold & Zucc. | 389 images |
| Suaeda calceoliformis (Hook.) Moq. | 1 images |
| Suaeda linearis (Elliott) Moq. | 4 images |
| Suaeda maritima (L.) Dumort. | 1030 images |
| Subularia aquatica L. | 27 images |
| Succisa pratensis Moench | 5088 images |
| Succisella inflexa (Kluk) Beck | 146 images |
| Symphoricarpos albus (L.) S.F.Blake | 11667 images |
| Symphoricarpos occidentalis (R.Br.) Hook. | 76 images |
| Symphoricarpos orbiculatus Moench | 3574 images |
| Symphyotrichum cordifolium (L.) G.L.Nesom | 1070 images |
| Symphyotrichum drummondii (Lindl.) G.L.Nesom | 1 images |
| Symphyotrichum dumosum (L.) G.L.Nesom | 79 images |
| Symphyotrichum ericoides (L.) G.L.Nesom | 2134 images |
| Symphyotrichum laeve (L.) Á.Löve & D.Löve | 264 images |
| Symphyotrichum lanceolatum (Willd.) G.L.Nesom | 3577 images |
| Symphyotrichum lateriflorum (L.) Á.Löve & D.Löve | 153 images |
| Symphyotrichum novae-angliae (L.) G.L.Nesom | 3309 images |
| Symphyotrichum novi-belgii (L.) G.L.Nesom | 7279 images |
| Symphyotrichum oblongifolium (Nutt.) G.L.Nesom | 102 images |
| Symphyotrichum ontarionis (Wiegand) G.L.Nesom | 7 images |
| Symphyotrichum oolentangiense (Riddell) G.L.Nesom | 299 images |
| Symphyotrichum patens (Aiton) G.L.Nesom | 4 images |
| Symphyotrichum pilosum (Willd.) G.L.Nesom | 440 images |
| Symphyotrichum praealtum (Poir.) G.L.Nesom | 5 images |
| Symphyotrichum puniceum (L.) Á.Löve & D.Löve | 177 images |
| Symphyotrichum racemosum (Elliott) G.L.Nesom | 7 images |
| Symphyotrichum sericeum (Vent.) G.L.Nesom | 13 images |
| Symphyotrichum shortii (Lindl.) G.L.Nesom | 13 images |
| Symphyotrichum subulatum (Michx.) G.L.Nesom | 967 images |
| Symphytum × uplandicum Nyman | 619 images |
| Symphytum asperum Lepech. | 2988 images |
| Symphytum officinale L. | 20976 images |
| Symphytum tuberosum L. | 4499 images |
| Symplocarpus foetidus (L.) Salisb. ex W.P.C.Barton | 557 images |
| Symplocos paniculata (Thunb.) Miq. | 28 images |
| Symplocos tinctoria (L.) L'Hér. | 5 images |
| Synandra hispidula (Michx.) Baill. | 2 images |
| Syringa reticulata (Blume) H.Hara | 790 images |
| Syringa vulgaris L. | 21478 images |
| Taeniatherum caput-medusae (L.) Nevski | 101 images |
| Taenidia integerrima (L.) Drude | 48 images |
| Taenidia montana (Mack.) Cronquist | 1 images |
| Tagetes erecta L. | 14859 images |
| Tagetes minuta L. | 1115 images |
| Tamarix parviflora DC. | 3267 images |
| Tanacetum balsamita L. | 607 images |
| Tanacetum bipinnatum Sch.Bip. | 34 images |
| Tanacetum coccineum (Willd.) Grierson | 1146 images |
| Tanacetum parthenium (L.) Sch.Bip. | 9503 images |
| Tanacetum vulgare L. | 19605 images |
| Taraxacum erythrospermum Andrz. ex Besser | 1227 images |
| Taraxacum palustre (Lyons) Symons | 324 images |
| Taraxacum sect. Taraxacum F.H.Wigg. | 14843 images |
| Taxodium distichum (L.) Rich. | 10143 images |
| Taxus baccata L. | 14000 images |
| Taxus canadensis Marshall | 1601 images |
| Taxus cuspidata Siebold & Zucc. | 2038 images |
| Teesdalia nudicaulis (L.) W.T.Aiton | 37 images |
| Tephrosia virginiana (L.) Pers. | 77 images |
| Tetradium daniellii (Benn.) T.G.Hartley | 769 images |
| Tetragonia tetragonoides (Pall.) Kuntze | 699 images |
| Tetraneuris herbacea Greene | 9 images |
| Teucrium botrys L. | 430 images |
| Teucrium canadense L. | 660 images |
| Teucrium orientale L. | 41 images |
| Teucrium scorodonia L. | 8731 images |
| Thalictrum aquilegiifolium L. | 4294 images |
| Thalictrum clavatum DC. | 5 images |
| Thalictrum dasycarpum Fisch., C.A.Mey. & Avé-Lall. | 10 images |
| Thalictrum dioicum L. | 541 images |
| Thalictrum pubescens Pursh | 573 images |
| Thalictrum revolutum DC. | 26 images |
| Thalictrum venulosum Trel. | 1 images |
| Thaspium barbinode (Michx.) Nutt. | 35 images |
| Thaspium trifoliatum (L.) A.Gray | 22 images |
| Thelypteris noveboracensis (L.) Nieuwl. | 300 images |
| Thelypteris palustris Schott | 405 images |
| Thermopsis villosa (Walter) Fernald & B.G.Schub. | 1 images |
| Thinopyrum acutum (DC.) Banfi | 51 images |
| Thinopyrum intermedium (Host) Barkworth & D.R.Dewey | 19 images |
| Thladiantha dubia Bunge | 133 images |
| Thlaspi arvense L. | 2916 images |
| Thuja occidentalis L. | 7846 images |
| Thymelaea passerina (L.) Coss. & Germ. | 77 images |
| Thymophylla tenuiloba (DC.) Small | 69 images |
| Thymus pulegioides L. | 2899 images |
| Tiarella stolonifera G.L.Nesom | 3 images |
| Tilia americana L. | 5043 images |
| Tilia cordata Mill. | 12679 images |
| Tipularia discolor (Pursh) Nutt. | 350 images |
| Tofieldia pusilla (Michx.) Pers. | 91 images |
| Tomostima cuneifolia (Nutt.) Al-Shehbaz, M.Koch & Jordon-Thaden | 1 images |
| Torilis arvensis (Huds.) Link | 5569 images |
| Torilis japonica (Houtt.) DC. | 2040 images |
| Torilis leptophylla (L.) Rchb.f. | 127 images |
| Torilis nodosa (L.) Gaertn. | 1018 images |
| Torreyochloa pallida (Torr.) Church | 10 images |
| Toxicodendron pubescens Mill. | 72 images |
| Toxicodendron radicans (L.) Kuntze | 5503 images |
| Toxicodendron rydbergii (Small ex Rydb.) Greene | 147 images |
| Toxicodendron vernix (L.) Kuntze | 77 images |
| Trachyspermum ammi (L.) Sprague | 38 images |
| Tradescantia bracteata Small ex Britton | 8 images |
| Tradescantia occidentalis (Britton) Smyth | 124 images |
| Tradescantia ohiensis Raf. | 1026 images |
| Tradescantia subaspera Ker Gawl. | 69 images |
| Tradescantia virginiana L. | 5605 images |
| Tragia cordata Michx. | 13 images |
| Tragopogon × mirabilis Rouy | 1 images |
| Tragopogon dubius Scop. | 6798 images |
| Tragopogon porrifolius L. | 5088 images |
| Tragopogon pratensis L. | 9095 images |
| Tragus berteronianus Schult. | 76 images |
| Tragus racemosus (L.) All. | 190 images |
| Trapa natans L. | 371 images |
| Trautvetteria caroliniensis (Walter) Vail | 40 images |
| Triantha glutinosa (Michx.) Baker | 46 images |
| Triantha racemosa (Walter) Small | 1 images |
| Trianthema portulacastrum L. | 334 images |
| Tribulus terrestris L. | 2513 images |
| Trichophorum alpinum (L.) Pers. | 138 images |
| Trichophorum cespitosum (L.) Hartm. | 416 images |
| Trichostema brachiatum L. | 25 images |
| Trichostema dichotomum L. | 141 images |
| Trichostema setaceum Houtt. | 4 images |
| Tridens flavus (L.) Hitchc. | 71 images |
| Tridens strictus (Nutt.) Nash | 4 images |
| Trifolium arvense L. | 4023 images |
| Trifolium aureum Pollich | 1043 images |
| Trifolium campestre Schreb. | 4489 images |
| Trifolium dalmaticum Vis. | 7 images |
| Trifolium dubium Sibth. | 3759 images |
| Trifolium fragiferum L. | 1429 images |
| Trifolium hybridum L. | 1855 images |
| Trifolium incarnatum L. | 7654 images |
| Trifolium medium L. | 4037 images |
| Trifolium pannonicum Jacq. | 92 images |
| Trifolium pratense L. | 19147 images |
| Trifolium reflexum L. | 3 images |
| Trifolium repens L. | 13506 images |
| Trifolium resupinatum L. | 1538 images |
| Trifolium stoloniferum Muhl. | 1 images |
| Trifolium striatum L. | 256 images |
| Triglochin maritima L. | 399 images |
| Triglochin palustris L. | 167 images |
| Trigonella caerulea (L.) Ser. | 72 images |
| Trillium cernuum L. | 80 images |
| Trillium erectum L. | 1086 images |
| Trillium flexipes Raf. | 74 images |
| Trillium grandiflorum (Michx.) Salisb. | 1006 images |
| Trillium nivale Riddell | 30 images |
| Trillium pusillum Michx. | 4 images |
| Trillium recurvatum L.C.Beck | 11 images |
| Trillium sessile L. | 328 images |
| Trillium sulcatum T.S.Patrick | 5 images |
| Trillium undulatum Willd. | 291 images |
| Triodanis perfoliata (L.) Nieuwl. | 637 images |
| Triosteum angustifolium L. | 9 images |
| Triosteum aurantiacum E.P.Bicknell | 6 images |
| Triosteum perfoliatum L. | 54 images |
| Triphora trianthophoros (Sw.) Rydb. | 9 images |
| Tripidium ravennae (L.) H.Scholz | 111 images |
| Triplasis purpurea (Walter) Chapm. | 4 images |
| Tripleurospermum inodorum (L.) Sch.Bip. | 2576 images |
| Tripleurospermum maritimum (L.) W.D.J.Koch | 944 images |
| Tripolium pannonicum (Jacq.) Dobrocz. | 2313 images |
| Tripsacum dactyloides (L.) L. | 93 images |
| Trisetaria aurea (Ten.) Pignatti ex Kerguélen | 1 images |
| Trisetum flavescens (L.) P.Beauv. | 710 images |
| Triticum aestivum L. | 21926 images |
| Triticum turgidum L. | 1608 images |
| Trollius laxus Salisb. | 26 images |
| Tropaeolum majus L. | 10956 images |
| Tropidocarpum gracile Hook. | 24 images |
| Tsuga canadensis (L.) Carrière | 1679 images |
| Tulipa gesneriana L. | 9747 images |
| Tulipa sylvestris L. | 4051 images |
| Turgenia latifolia (L.) Hoffm. | 148 images |
| Turritis glabra L. | 1079 images |
| Tussilago farfara L. | 12582 images |
| Typha × glauca Godr. | 62 images |
| Typha angustifolia L. | 1197 images |
| Typha latifolia L. | 3909 images |
| Ulex europaeus L. | 7929 images |
| Ulmus alata Michx. | 612 images |
| Ulmus americana L. | 5047 images |
| Ulmus glabra Huds. | 8512 images |
| Ulmus minor Mill. | 15559 images |
| Ulmus parvifolia Jacq. | 1327 images |
| Ulmus pumila L. | 4008 images |
| Ulmus rubra Muhl. | 148 images |
| Ulmus thomasii Sarg. | 161 images |
| Urochloa plantaginea (Link) R.D.Webster | 1 images |
| Urtica chamaedryoides Pursh | 45 images |
| Urtica dioica L. | 16227 images |
| Urtica gracilis Aiton | 2 images |
| Urtica urens L. | 4631 images |
| Utricularia cornuta Michx. | 5 images |
| Utricularia geminiscapa Benj. | 13 images |
| Utricularia gibba L. | 52 images |
| Utricularia inflata Walter | 2 images |
| Utricularia intermedia Hayne | 82 images |
| Utricularia juncea Vahl | 6 images |
| Utricularia minor L. | 139 images |
| Utricularia ochroleuca R.W.Hartm. | 14 images |
| Utricularia purpurea Walter | 15 images |
| Utricularia radiata Small | 12 images |
| Utricularia striata Leconte ex Torr. | 8 images |
| Utricularia subulata L. | 40 images |
| Uvularia grandiflora Sm. | 276 images |
| Uvularia perfoliata L. | 76 images |
| Uvularia puberula Michx. | 11 images |
| Uvularia sessilifolia L. | 138 images |
| Vaccinium angustifolium Aiton | 796 images |
| Vaccinium arboreum Marshall | 223 images |
| Vaccinium caesariense Mack. | 1 images |
| Vaccinium cespitosum Michx. | 3 images |
| Vaccinium corymbosum L. | 2834 images |
| Vaccinium erythrocarpum Michx. | 3 images |
| Vaccinium macrocarpon Aiton | 362 images |
| Vaccinium membranaceum Douglas ex Torr. | 80 images |
| Vaccinium myrtilloides Michx. | 54 images |
| Vaccinium ovalifolium Sm. | 63 images |
| Vaccinium oxycoccos L. | 547 images |
| Vaccinium pallidum Aiton | 184 images |
| Vaccinium stamineum L. | 174 images |
| Vaccinium uliginosum L. | 1773 images |
| Vaccinium vitis-idaea L. | 3383 images |
| Valeriana dioica L. | 2814 images |
| Valeriana locusta L. | 6589 images |
| Valeriana officinalis L. | 9841 images |
| Valeriana pauciflora Michx. | 52 images |
| Valeriana umbilicata (Sull.) Christenh. & Byng | 13 images |
| Valeriana woodsiana (Torr. & A.Gray) Christenh. & Byng | 162 images |
| Vallisneria americana Michx. | 15 images |
| Veratrum viride Aiton | 650 images |
| Verbascum × thapsi L. | 6 images |
| Verbascum blattaria L. | 3926 images |
| Verbascum densiflorum Bertol. | 8695 images |
| Verbascum lychnitis L. | 4328 images |
| Verbascum nigrum L. | 10642 images |
| Verbascum phlomoides L. | 3680 images |
| Verbascum phoeniceum L. | 917 images |
| Verbascum sinuatum L. | 6495 images |
| Verbascum thapsus L. | 17189 images |
| Verbascum virgatum Stokes | 1748 images |
| Verbena bipinnatifida Schauer | 465 images |
| Verbena bonariensis L. | 10204 images |
| Verbena bracteata Cav. ex Lag. & Rodr. | 59 images |
| Verbena canadensis (L.) Britton | 161 images |
| Verbena hastata L. | 1368 images |
| Verbena incompta P.W.Michael | 96 images |
| Verbena lasiostachys Link | 138 images |
| Verbena officinalis L. | 8580 images |
| Verbena simplex Lehm. | 74 images |
| Verbena stricta Vent. | 408 images |
| Verbena urticifolia L. | 994 images |
| Verbesina alternifolia (L.) Britton ex Kearney | 722 images |
| Verbesina encelioides (Cav.) Benth. & Hook.f. ex A.Gray | 641 images |
| Verbesina helianthoides Michx. | 25 images |
| Verbesina occidentalis Walter | 221 images |
| Verbesina virginica L. | 421 images |
| Vernonia arkansana DC. | 55 images |
| Vernonia baldwinii Torr. | 812 images |
| Vernonia fasciculata Michx. | 160 images |
| Vernonia gigantea (Walter) Trel. | 26 images |
| Vernonia glauca Willd. | 3 images |
| Vernonia missurica Raf. | 28 images |
| Vernonia noveboracensis (L.) Michx. | 843 images |
| Veronica agrestis L. | 1834 images |
| Veronica anagallis-aquatica L. | 1782 images |
| Veronica arvensis L. | 3374 images |
| Veronica bachofenii Heuff. | 12 images |
| Veronica beccabunga L. | 2951 images |
| Veronica bullii (Eaton) M.M.Mart.Ort. & Albach | 1 images |
| Veronica catenata Pennell | 123 images |
| Veronica chamaedrys L. | 19561 images |
| Veronica dillenii Crantz | 56 images |
| Veronica filiformis Sm. | 3268 images |
| Veronica hederifolia L. | 3266 images |
| Veronica longifolia L. | 2168 images |
| Veronica officinalis L. | 3987 images |
| Veronica peregrina L. | 371 images |
| Veronica persica Poir. | 14900 images |
| Veronica polita Fr. | 2630 images |
| Veronica scutellata L. | 336 images |
| Veronica serpyllifolia L. | 3944 images |
| Veronica spicata L. | 4301 images |
| Veronica spuria L. | 90 images |
| Veronica sublobata M.A.Fisch. | 839 images |
| Veronica teucrium L. | 920 images |
| Veronica triphyllos L. | 155 images |
| Veronica verna L. | 205 images |
| Veronica wormskjoldii Roem. & Schult. | 6 images |
| Veronicastrum virginicum (L.) Farw. | 1480 images |
| Viburnum acerifolium L. | 774 images |
| Viburnum buddleifolium C.H.Wright | 53 images |
| Viburnum carlesii Hemsl. | 2498 images |
| Viburnum cassinoides L. | 17 images |
| Viburnum dentatum L. | 699 images |
| Viburnum dilatatum Thunb. | 200 images |
| Viburnum edule (Michx.) Raf. | 38 images |
| Viburnum lantana L. | 15415 images |
| Viburnum lantanoides Michx. | 720 images |
| Viburnum lentago L. | 357 images |
| Viburnum nudum L. | 286 images |
| Viburnum opulus L. | 20850 images |
| Viburnum plicatum Thunb. | 5013 images |
| Viburnum prunifolium L. | 539 images |
| Viburnum rafinesqueanum Schult. | 4 images |
| Viburnum recognitum Fernald | 68 images |
| Viburnum rufidulum Raf. | 246 images |
| Viburnum setigerum Hance | 25 images |
| Viburnum sieboldii Miq. | 94 images |
| Viburnum trilobum Marshall | 2913 images |
| Viburnum wrightii Miq. | 2 images |
| Vicia americana Muhl. ex Willd. | 103 images |
| Vicia caroliniana Walter | 52 images |
| Vicia cracca L. | 8886 images |
| Vicia faba L. | 5882 images |
| Vicia grandiflora Scop. | 461 images |
| Vicia hirsuta (L.) Gray | 2391 images |
| Vicia hybrida L. | 1620 images |
| Vicia lathyroides L. | 417 images |
| Vicia lens (L.) Coss. & Germ. | 723 images |
| Vicia narbonensis L. | 504 images |
| Vicia pannonica Crantz | 650 images |
| Vicia sativa L. | 14706 images |
| Vicia sepium L. | 7241 images |
| Vicia tetrasperma (L.) Schreb. | 742 images |
| Vicia villosa Roth | 9114 images |
| Vinca major L. | 17208 images |
| Vinca minor L. | 16417 images |
| Vincetoxicum hirundinaria Medik. | 5544 images |
| Vincetoxicum nigrum (L.) Moench | 659 images |
| Vincetoxicum rossicum (Kleopow) Barbar. | 20 images |
| Viola × melissifolia Greene | 495 images |
| Viola adunca Sm. | 191 images |
| Viola arvensis Murray | 5582 images |
| Viola blanda Willd. | 302 images |
| Viola canadensis L. | 253 images |
| Viola cucullata Aiton | 44 images |
| Viola hastata Michx. | 86 images |
| Viola hirsutula Brainerd | 7 images |
| Viola labradorica Schrank | 247 images |
| Viola lanceolata L. | 58 images |
| Viola macloskeyi F.E.Lloyd | 10 images |
| Viola nephrophylla Greene | 5 images |
| Viola odorata L. | 15135 images |
| Viola palmata L. | 19 images |
| Viola palustris L. | 1170 images |
| Viola pedata L. | 179 images |
| Viola pedatifida G.Don | 19 images |
| Viola pubescens Aiton | 925 images |
| Viola renifolia A.Gray | 6 images |
| Viola rostrata Muhl. ex Pursh | 89 images |
| Viola rotundifolia Michx. | 45 images |
| Viola sagittata Aiton | 115 images |
| Viola selkirkii Pursh ex Goldie | 12 images |
| Viola sororia Willd. | 1851 images |
| Viola striata Aiton | 285 images |
| Viola tricolor L. | 8721 images |
| Viola tripartita Elliott | 6 images |
| Viola walteri House | 7 images |
| Viscaria vulgaris Röhl. | 44 images |
| Visnaga daucoides Gaertn. | 2462 images |
| Vitis aestivalis Michx. | 1669 images |
| Vitis cinerea (Engelm.) Millardet | 2 images |
| Vitis labrusca L. | 729 images |
| Vitis riparia Michx. | 1040 images |
| Vitis rotundifolia Michx. | 1746 images |
| Vitis rupestris Scheele | 49 images |
| Vitis vinifera L. | 17143 images |
| Vitis vulpina L. | 1273 images |
| Vittaria appalachiana Farrar & Mickel | 1 images |
| Waldsteinia fragarioides (Michx.) Tratt. | 35 images |
| Weigela florida (Bunge) A.DC. | 9640 images |
| Weigela japonica Thunb. | 17 images |
| Wisteria frutescens (L.) Poir. | 1239 images |
| Wisteria sinensis (Sims) DC. | 1839 images |
| Wolffia brasiliensis Wedd. | 267 images |
| Wolffia columbiana H.Karst. | 1 images |
| Wolffiella gladiata (Hegelm.) Hegelm. | 1 images |
| Woodsia alpina (Bolton) Gray | 65 images |
| Woodsia glabella R.Br. | 1 images |
| Woodsia ilvensis (L.) R.Br. | 93 images |
| Woodsia obtusa (Spreng.) Torr. | 18 images |
| Woodsia oregana D.C.Eaton | 14 images |
| Woodwardia areolata (L.) T.Moore | 1 images |
| Woodwardia virginica (L.) Sm. | 21 images |
| Xanthisma gracile (Nutt.) D.R.Morgan & R.L.Hartm. | 39 images |
| Xanthium chinense Mill. | 1 images |
| Xanthium orientale L. | 519 images |
| Xanthium spinosum L. | 1142 images |
| Xanthorhiza simplicissima Marshall | 72 images |
| Xerochrysum bracteatum (Vent.) Tzvelev | 1784 images |
| Xerophyllum asphodeloides (L.) Nutt. | 8 images |
| Xyris caroliniana Walter | 9 images |
| Xyris difformis Chapm. | 3 images |
| Xyris jupicai Rich. | 347 images |
| Xyris montana Ries | 3 images |
| Xyris torta Sm. | 7 images |
| Youngia japonica (L.) DC. | 1344 images |
| Yucca filamentosa L. | 5703 images |
| Yucca flaccida Haw. | 292 images |
| Zannichellia palustris L. | 78 images |
| Zanthoxylum americanum Mill. | 271 images |
| Zea mays L. | 24291 images |
| Zelkova serrata (Thunb.) Makino | 1832 images |
| Zinnia elegans Jacq. | 5400 images |
| Zizania aquatica L. | 19 images |
| Zizia aptera (A.Gray) Fernald | 286 images |
| Zizia aurea (L.) W.D.J.Koch | 83 images |
| Zizia trifoliata (Michx.) Fernald | 6 images |
| Zostera marina L. | 120 images |
| Zoysia japonica Steud. | 12 images |
| Zygophyllum fabago L. | 627 images |