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• Genera
• Species 1,042

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Acanthospermum hispidum DC.

Bristly Starbur

124 83 Observations

Asteraceae

Achillea ageratum L.

Mace

518 363 Observations

Asteraceae

Achillea atrata L.

Dark-stemmed Sneezewort

179 110 Observations

Asteraceae

Achillea barrelieri (Ten.) Sch.Bip.

 

53 43 Observations

Asteraceae

Achillea chamaemelifolia Pourr.

Andorran milfoil

53 25 Observations

Asteraceae

Achillea clavennae L.

Silvery Yarrow

408 271 Observations

Asteraceae

Achillea coarctata Poir.

 

18 11 Observations

Asteraceae

Achillea crithmifolia Waldst. & Kit.

Least Concern

Yarrow

118 75 Observations

Asteraceae

Achillea distans Waldst. & Kit. ex Willd.

Tall yarrow

2,598 2,087 Observations

Asteraceae

Achillea erba-rotta All.

Simple-leaved Milfoil

565 390 Observations

Asteraceae

Achillea filipendulina Lam.

Fernleaf yarrow

6,168 4,803 Observations

Asteraceae

Achillea ligustica All.

Ligurian Yarrow

400 282 Observations

Asteraceae

Achillea lucana Pignatti

 

4 1 Observation

Asteraceae

Achillea macrophylla L.

Big-leaf Yarrow

405 243 Observations

Asteraceae

Achillea maritima (L.) Ehrend. & Y.P.Guo

Cottonweed

975 693 Observations

Asteraceae

Achillea millefolium L.

Least Concern

Common yarrow

25,819 21,466 Observations

Asteraceae

Achillea nana L.

Dwarf Alpine Yarrow

381 231 Observations

Asteraceae

Achillea nobilis L.

Noble yarrow

10,749 8,944 Observations

Asteraceae

Achillea odorata L.

Cream flowered Sneezewort

1,005 725 Observations

Asteraceae

Achillea oxyloba (DC.) Sch.Bip.

Alpine sneezewort

15 8 Observations

Asteraceae

Achillea pannonica Scheele

Yarrow

31 21 Observations

Asteraceae

Achillea ptarmica L.

Least Concern

Sneezewort

3,547 2,745 Observations

Asteraceae

Achillea roseo-alba Ehrend.

Pink Rose Yarrow

38 28 Observations

Asteraceae

Achillea setacea Waldst. & Kit.

Bristly yarrow

217 147 Observations

Asteraceae

Achillea tomentosa L.

Woolly Yarrow

938 711 Observations

Asteraceae

Achillea virescens (Fenzl) Heimerl

 

19 14 Observations

Asteraceae

Adenostyles alliariae (Gouan) A.Kern.

Adenostyles

1,513 1,000 Observations

Asteraceae

Adenostyles alpina (L.) Bluff & Fingerh.

Blue mallow

2,408 1,835 Observations

Asteraceae

Adenostyles leucophylla (Willd.) Rchb.

Pinky Fieldbush

15 7 Observations

Asteraceae

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

Crofton weed

681 513 Observations

Asteraceae

Ageratina altissima (L.) R.M.King & H.Rob.

White Snakeroot

1,172 922 Observations

Asteraceae

Ageratum conyzoides L.

Billygoat-weed

621 469 Observations

Asteraceae

Ageratum houstonianum Mill.

Bluemink

3,345 2,840 Observations

Asteraceae

Allagopappus dichotomus Cass.

 

14 7 Observations

Asteraceae

Ambrosia artemisiifolia L.

Annual ragweed

5,062 4,024 Observations

Asteraceae

Ambrosia maritima L.

Least Concern

Coastal Ragweed

5 4 Observations

Asteraceae

Ambrosia psilostachya DC.

Perennial Ragweed

403 292 Observations

Asteraceae

Ambrosia tenuifolia Spreng.

Lacy Ambrosia

51 31 Observations

Asteraceae

Ambrosia trifida L.

Giant Ragweed

1,074 892 Observations

Asteraceae

Anacyclus clavatus (Desf.) Pers.

White Anacyclus

2,830 1,845 Observations

Asteraceae

Anacyclus homogamos (Maire) Humphries

 

27 15 Observations

Asteraceae

Anacyclus radiatus Loisel.

Yellow anacyclus

1,497 1,083 Observations

Asteraceae

Anacyclus valentinus L.

Bachelor's button

20 14 Observations

Asteraceae

Anaphalis margaritacea (L.) Benth.

Pearly Everlasting

12 9 Observations

Asteraceae

Anaphalis triplinervis (Sims) Sims ex C.B.Clarke

Pearly everlasting

337 239 Observations

Asteraceae

Andryala glandulosa Lam.

 

133 75 Observations

Asteraceae

Andryala integrifolia L.

Common Andryala

4,268 2,985 Observations

Asteraceae

Andryala ragusina L.

Misty andryala

499 311 Observations

Asteraceae

Antennaria carpatica (Wahlenb.) Bluff & Fingerh.

Carpathian Pussytoes

91 43 Observations

Asteraceae

Antennaria dioica (L.) Gaertn.

Pussytoes

2,120 1,387 Observations

Asteraceae

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