Invasive plants Invasive species potentially threatening livelihoods and the environment around the world Explore
Acanthospermum australe (Loefl.) Kuntze
Spiny-bur
Asteraceae
26
Acanthospermum hispidum DC.
Bristly starbur
Asteraceae
60
Achillea millefolium L.
Yarrow
Asteraceae
17,157
Acmella uliginosa (Sw.) Cass.
Marsh para cress
Ageratina adenophora (Spreng.) R.M.King & H.Rob.
Croftonweed
Asteraceae
160
Ageratina riparia (Regel) R.M.King & H.Rob.
Mistflower
Asteraceae
316
Ageratum conyzoides L.
Billy goat weed
Asteraceae
134
Ageratum houstonianum Mill.
Blue billygoatweed
Asteraceae
1,035
Ambrosia artemisiifolia L.
Common ragweed
Asteraceae
1,719
Ambrosia psilostachya DC.
Perennial ragweed
Asteraceae
184
Ambrosia trifida L.
Giant ragweed
Asteraceae
400
Anthemis cotula L.
Dog fennel
Asteraceae
527
Arctotheca calendula (L.) Levyns
Capeweed
Asteraceae
492
Artemisia biennis Willd.
Biennial wormwood
Asteraceae
46
Baccharis halimifolia L.
Groundsel-bush
Asteraceae
497
Baccharis pilularis DC.
Coyote brush
Asteraceae
532
Bidens alba (L.) DC.
Romerillo
Bidens frondosa L.
Beggarticks
Asteraceae
974
Bidens pilosa L.
Blackjack
Asteraceae
1,092
Carduus nutans L.
Nodding thistle
Asteraceae
1,736
Carduus pycnocephalus L.
Italian thistle
Asteraceae
1,591
Centaurea diffusa Lam.
Diffuse knapweed
Asteraceae
29
Centaurea iberica Trevir. ex Spreng.
Iberian knapweed
Asteraceae
11
Centaurea macrocephala Muss.Puschk. ex Willd.
Giant knapweed
Asteraceae
14
Centaurea melitensis L.
Maltese starthistle
Asteraceae
425
Centaurea solstitialis L.
Yellow starthistle
Asteraceae
623
Centaurea stoebe Tausch
Spotted knapweed
Centratherum punctatum Cass.
Lark daisy
Asteraceae
187
Chondrilla juncea L.
Rush skeletonweed
Asteraceae
650
Chromolaena odorata (L.) R.M.King & H.Rob.
Siam weed
Asteraceae
203
Chrysanthemoides monilifera (L.) Norl.
Boneseed
Asteraceae
16
Cichorium endivia L.
Endives
Asteraceae
290
Cirsium arvense (L.) Scop.
Creeping thistle
Asteraceae
6,336
Cirsium mexicanum DC.
Mexican thistle
Asteraceae
17
Cirsium vulgare (Savi) Ten.
Spear thistle
Asteraceae
9,454
Conyza bonariensis (L.) Cronquist
Hairy fleabane
Asteraceae
89
Conyza canadensis (L.) Cronquist
Canadian fleabane
Asteraceae
653
Cosmos caudatus Kunth
Wild cosmos
Asteraceae
181
Cosmos sulphureus Cav.
Sulphur cosmos
Asteraceae
1,586
Crassocephalum crepidioides (Benth.) S.Moore
Redflower ragleaf
Asteraceae
57
Crupina vulgaris Pers. ex Cass.
Bearded creeper
Asteraceae
11
Cyanthillium cinereum (L.) H.Rob.
Little ironweed
Asteraceae
151
Cynara cardunculus L.
Cardoon
Asteraceae
1,106
Dahlia imperialis Roezl ex Ortgies
Bell tree dahlia
Asteraceae
27
Delairea odorata Lem.
Cape ivy
Asteraceae
306
Eclipta prostrata (L.) L.
Eclipta
Asteraceae
512
Elephantopus mollis Kunth
Elephant's foot
Asteraceae
35
Emilia fosbergii Nicolson
Florida tassel-flower
Asteraceae
232
Emilia sonchifolia (L.) DC.
Red tasselflower
Asteraceae
85
Erechtites hieraciifolius (L.) Raf. ex DC.
American burnweed
Asteraceae
367
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