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Canada thistle
36%
Cirsium arvense
Arizona thistle
36%
Cirsium arizonicum
peregrine thistle
36%
Cirsium cymosum
Douglas' thistle
36%
Cirsium douglasii
mountaintop thistle
36%
Cirsium eatonii
swamp thistle
36%
Cirsium muticum
Parry's thistle
36%
Cirsium parryi
pasture thistle
36%
Cirsium pumilum
Texas thistle
36%
Cirsium texanum
bull thistle
36%
Cirsium vulgare
Greene's thistle
36%
Cirsium inamoenum
edible thistle
33%
Cirsium edule
Suisun thistle
33%
Cirsium hydrophilum
Wyoming thistle
33%
Cirsium pulcherrimum
wavy-leaf thistle
33%
Cirsium undulatum
fringed thistle
31%
Cirsium clavatum
field thistle
31%
Cirsium discolor
elk thistle
31%
Cirsium foliosum
fountain thistle
31%
Cirsium fontinale
Graham's thistle
31%
Cirsium grahamii
Le Conte's thistle
31%
Cirsium lecontei
New Mexico thistle
31%
Cirsium neomexicanum
European marsh thistle
31%
Cirsium palustre
sand dune thistle
31%
Cirsium pitcheri
sandhill thistle
31%
Cirsium repandum
meadow thistle
31%
Cirsium scariosum
Wheeler's thistle
31%
Cirsium wheeleri
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