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

• Families
• Genera
• Species 696

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Acamptopappus shockleyi A.Gray

Shockley's goldenhead

17 17 Observations

Asteraceae

Achillea filipendulina Lam.

Fernleaf yarrow

5,418 4,242 Observations

Asteraceae

Achillea millefolium L.

Least Concern

Common yarrow

25,070 20,922 Observations

Asteraceae

Achyrachaena mollis Schauer

Blow wives

88 85 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

135 107 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

645 485 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

555 431 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

46 44 Observations

Asteraceae

Agoseris glauca (Pursh) Raf.

Prairie agoseris

33 28 Observations

Asteraceae

Agoseris grandiflora (Nutt.) Greene

Grassland agoseris

53 53 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

4,738 3,745 Observations

Asteraceae

Ambrosia chamissonis Greene

Silver bur ragweed

133 124 Observations

Asteraceae

Ambrosia confertiflora DC.

Bur ragweed

19 19 Observations

Asteraceae

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

Bur-sage

5 3 Observations

Asteraceae

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

Singlewhorl burrobrush

2 1 Observation

Asteraceae

Ambrosia psilostachya DC.

Dunbible-weed

359 268 Observations

Asteraceae

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

Burrobrush

1 1 Observation

Asteraceae

Ambrosia trifida L.

Giant Ragweed

975 802 Observations

Asteraceae

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

Pearly Everlasting

1,292 987 Observations

Asteraceae

Anisocarpus madioides Nutt.

Tarweed

14 14 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

5 3 Observations

Asteraceae

Antennaria microphylla Rydb.

Littleleaf pussytoes

5 4 Observations

Asteraceae

Antennaria parvifolia Nutt.

Nuttall's pussytoes

86 65 Observations

Asteraceae

Antennaria pulchella Greene

Sierran Pussytoes

6 6 Observations

Asteraceae

Antennaria rosea Greene

Rosy pussytoes

2 2 Observations

Asteraceae

Antennaria umbrinella Rydb.

Brown-Bract Pussytoes

1 1 Observation

Asteraceae

Anthemis arvensis L.

Field chamomile

3,812 2,870 Observations

Asteraceae

Anthemis cotula L.

Chamomile

1,483 1,167 Observations

Asteraceae

Aphanostephus ramosissimus DC.

Plains lazy daisy

36 31 Observations

Asteraceae

Arctium lappa L.

Great Burdock

9,740 7,820 Observations

Asteraceae

Arctium minus (Hill) Bernh.

Common burdock

11,306 8,795 Observations

Asteraceae

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