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• Genera
• Species 1,036

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Acanthospermum hispidum DC.

Bristly Starbur

118 79 Observations

Asteraceae

Achillea ageratum L.

Mace

473 328 Observations

Asteraceae

Achillea atrata L.

Dark-stemmed Sneezewort

168 105 Observations

Asteraceae

Achillea barrelieri (Ten.) Sch.Bip.

 

48 38 Observations

Asteraceae

Achillea chamaemelifolia Pourr.

 

38 16 Observations

Asteraceae

Achillea clavennae L.

Silvery Yarrow

352 232 Observations

Asteraceae

Achillea coarctata Poir.

 

18 11 Observations

Asteraceae

Achillea crithmifolia Waldst. & Kit.

Least Concern

Yarrow

103 64 Observations

Asteraceae

Achillea distans Waldst. & Kit. ex Willd.

Tall yarrow

2,142 1,725 Observations

Asteraceae

Achillea erba-rotta All.

Simple-leaved Milfoil

519 354 Observations

Asteraceae

Achillea filipendulina Lam.

Fernleaf yarrow

5,450 4,268 Observations

Asteraceae

Achillea ligustica All.

Ligurian Yarrow

362 254 Observations

Asteraceae

Achillea lucana Pignatti

 

4 1 Observation

Asteraceae

Achillea macrophylla L.

Big-leaf Yarrow

358 215 Observations

Asteraceae

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

Cottonweed

891 631 Observations

Asteraceae

Achillea millefolium L.

Least Concern

Common yarrow

25,117 20,961 Observations

Asteraceae

Achillea nana L.

Dwarf Alpine Yarrow

363 217 Observations

Asteraceae

Achillea nobilis L.

Noble yarrow

8,866 7,386 Observations

Asteraceae

Achillea odorata L.

Cream flowered Sneezewort

899 647 Observations

Asteraceae

Achillea oxyloba (DC.) Sch.Bip.

 

15 8 Observations

Asteraceae

Achillea pannonica Scheele

Yarrow

26 17 Observations

Asteraceae

Achillea ptarmica L.

Least Concern

Sneezewort

3,201 2,482 Observations

Asteraceae

Achillea roseo-alba Ehrend.

Pink Rose Yarrow

32 24 Observations

Asteraceae

Achillea setacea Waldst. & Kit.

Bristly yarrow

156 111 Observations

Asteraceae

Achillea tomentosa L.

Woolly Yarrow

781 593 Observations

Asteraceae

Achillea virescens (Fenzl) Heimerl

 

19 14 Observations

Asteraceae

Adenostyles alliariae (Gouan) A.Kern.

Great Pink Bloom

1,432 950 Observations

Asteraceae

Adenostyles alpina (L.) Bluff & Fingerh.

Blue mallow

2,103 1,610 Observations

Asteraceae

Adenostyles leucophylla (Willd.) Rchb.

Pinky Fieldbush

15 7 Observations

Asteraceae

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

Crofton weed

645 485 Observations

Asteraceae

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

White Snakeroot

1,050 822 Observations

Asteraceae

Ageratum conyzoides L.

Billygoat-weed

559 433 Observations

Asteraceae

Ageratum houstonianum Mill.

Bluemink

3,092 2,651 Observations

Asteraceae

Allagopappus dichotomus Cass.

 

14 7 Observations

Asteraceae

Ambrosia artemisiifolia L.

Annual ragweed

4,750 3,756 Observations

Asteraceae

Ambrosia maritima L.

Least Concern

Coastal Ragweed

5 4 Observations

Asteraceae

Ambrosia psilostachya DC.

Perennial Ragweed

359 268 Observations

Asteraceae

Ambrosia tenuifolia Spreng.

Lacy Ambrosia

51 31 Observations

Asteraceae

Ambrosia trifida L.

Giant Ragweed

978 805 Observations

Asteraceae

Anacyclus clavatus (Desf.) Pers.

White Anacyclus

2,652 1,717 Observations

Asteraceae

Anacyclus homogamos (Maire) Humphries

 

27 15 Observations

Asteraceae

Anacyclus radiatus Loisel.

Yellow button.

1,365 995 Observations

Asteraceae

Anacyclus valentinus L.

Bachelor's button

19 13 Observations

Asteraceae

Anaphalis margaritacea (L.) Benth.

Pearly Everlasting

12 9 Observations

Asteraceae

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

Pearly everlasting

316 226 Observations

Asteraceae

Andryala glandulosa Lam.

 

119 67 Observations

Asteraceae

Andryala integrifolia L.

Common Andryala

3,795 2,641 Observations

Asteraceae

Andryala ragusina L.

Misty andryala

453 284 Observations

Asteraceae

Antennaria carpatica (Wahlenb.) Bluff & Fingerh.

Carpathian Pussytoes

84 39 Observations

Asteraceae

Antennaria dioica (L.) Gaertn.

Cat's Foot

1,791 1,157 Observations

Asteraceae

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