Southwestern U.S.A. Plants of Southwestern U.S.A.Explore

• Families
• Genera
• Species 703

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Acamptopappus shockleyi A.Gray

Shockley's goldenhead

20 19 Observations

Asteraceae

Achillea filipendulina Lam.

Fernleaf yarrow

6 269 4 888 Observations

Asteraceae

Achillea millefolium L.

Least Concern

Common yarrow

25 938 21 560 Observations

Asteraceae

Achyrachaena mollis Schauer

Blow wives

91 88 Observations

Asteraceae

Acourtia microcephala DC.

Sacapellote

35 34 Observations

Asteraceae

Acourtia thurberi (A.Gray) Reveal & R.M.King

Thurber's desertpeony

8 8 Observations

Asteraceae

Acourtia wrightii (A.Gray) Reveal & R.M.King

Wright's desertpeony

1 1 Observation

Asteraceae

Adenocaulon bicolor Hook.

Trailplant

163 122 Observations

Asteraceae

Adenophyllum porophylloides (A.Gray) Strother

San Felipe dogweed

14 14 Observations

Asteraceae

Adenophyllum porophyllum (Cav.) Hemsl.

Poreleaf dogweed

14 10 Observations

Asteraceae

Ageratina adenophora (Spreng.) R.M.King & H.Rob.

Crofton weed

683 515 Observations

Asteraceae

Ageratina herbacea (A.Gray) R.M.King & H.Rob.

Fragrant snakeroot

17 17 Observations

Asteraceae

Ageratina occidentalis (Hook.) R.M.King & H.Rob.

Western eupatorium

30 30 Observations

Asteraceae

Ageratina paupercula (A.Gray) R.M.King & H.Rob.

Santa Rita snakeroot

7 7 Observations

Asteraceae

Ageratina rothrockii (A.Gray) R.M.King & H.Rob.

Rothrock's snakeroot

3 3 Observations

Asteraceae

Ageratum conyzoides L.

Tropical whiteweed

626 473 Observations

Asteraceae

Ageratum corymbosum Zuccagni

Flat-top whiteweed

1 1 Observation

Asteraceae

Agnorhiza bolanderi (A.Gray) W.A.Weber

Bolander's mule-ears

8 8 Observations

Asteraceae

Agoseris apargioides (Less.) Greene

Seaside agoseris

49 48 Observations

Asteraceae

Agoseris aurantiaca (Hook.) Greene

Mountain agoseris

47 45 Observations

Asteraceae

Agoseris glauca (Pursh) Raf.

Prairie agoseris

36 31 Observations

Asteraceae

Agoseris grandiflora (Nutt.) Greene

Grassland agoseris

58 56 Observations

Asteraceae

Agoseris heterophylla (Nutt.) Greene

Annual agoseris

45 45 Observations

Asteraceae

Agoseris retrorsa Greene

Spearleaf agoseris

28 28 Observations

Asteraceae

Aldama cordifolia (A.Gray) E.E.Schill. & Panero

 

4 4 Observations

Asteraceae

Ambrosia acanthicarpa Hook.

Hooker's bur ragweed

63 56 Observations

Asteraceae

Ambrosia artemisiifolia L.

Annual ragweed

5 221 4 159 Observations

Asteraceae

Ambrosia chamissonis Greene

Silver bur ragweed

136 127 Observations

Asteraceae

Ambrosia confertiflora DC.

Bur ragweed

21 21 Observations

Asteraceae

Ambrosia dumosa (A.Gray) W.W.Payne

Bur-sage

8 5 Observations

Asteraceae

Ambrosia monogyra (Torr. & A.Gray) Strother & B.G.Baldwin

Singlewhorl burrobrush

2 1 Observation

Asteraceae

Ambrosia psilostachya DC.

Dunbible-weed

409 298 Observations

Asteraceae

Ambrosia salsola (Torr. & A.Gray) Strother & B.G.Baldwin

Burrobrush

1 1 Observation

Asteraceae

Ambrosia trifida L.

Giant Ragweed

1 096 912 Observations

Asteraceae

Anaphalis margaritacea (L.) Benth. & Hook.f.

Pearly Everlasting

1 439 1 086 Observations

Asteraceae

Anisocarpus madioides Nutt.

Tarweed

16 16 Observations

Asteraceae

Antennaria howellii Greene

Howell's pussytoes

21 20 Observations

Asteraceae

Antennaria lanata Greene

Woolly pussytoes

10 8 Observations

Asteraceae

Antennaria marginata Greene

Whitemargin pussytoes

1 1 Observation

Asteraceae

Antennaria media Greene

Rocky Mountain pussytoes

9 4 Observations

Asteraceae

Antennaria microphylla Rydb.

Littleleaf pussytoes

6 5 Observations

Asteraceae

Antennaria parvifolia Nutt.

Nuttall's pussytoes

96 72 Observations

Asteraceae

Antennaria pulchella Greene

Sierran Pussytoes

6 6 Observations

Asteraceae

Antennaria rosea Greene

Rosy pussytoes

5 3 Observations

Asteraceae

Antennaria umbrinella Rydb.

Brown-Bract Pussytoes

2 2 Observations

Asteraceae

Anthemis arvensis L.

Field chamomile

4 266 3 203 Observations

Asteraceae

Anthemis cotula L.

Chamomile

1 704 1 346 Observations

Asteraceae

Aphanostephus ramosissimus DC.

Plains lazy daisy

41 36 Observations

Asteraceae

Arctium lappa L.

Great Burdock

10 963 8 808 Observations

Asteraceae

Arctium minus (Hill) Bernh.

Common burdock

12 238 9 464 Observations

Asteraceae

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