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bull thistle
38%
Cirsium vulgare
Mojave thistle
37%
Cirsium mohavense
Suisun thistle
35%
Cirsium hydrophilum
fringed thistle
33%
Cirsium clavatum
field thistle
33%
Cirsium discolor
edible thistle
33%
Cirsium edule
elk thistle
33%
Cirsium foliosum
fountain thistle
33%
Cirsium fontinale
Graham's thistle
33%
Cirsium grahamii
Le Conte's thistle
33%
Cirsium lecontei
New Mexico thistle
33%
Cirsium neomexicanum
Nuttall's thistle
33%
Cirsium nuttallii
European marsh thistle
33%
Cirsium palustre
Parry's thistle
33%
Cirsium parryi
sand dune thistle
33%
Cirsium pitcheri
sandhill thistle
33%
Cirsium repandum
meadow thistle
33%
Cirsium scariosum
Wheeler's thistle
33%
Cirsium wheeleri
Virginia thistle
32%
Cirsium virginianum
Canada thistle
31%
Cirsium arvense
Arizona thistle
31%
Cirsium arizonicum
graygreen thistle
31%
Cirsium cymosum
Douglas' thistle
31%
Cirsium douglasii
mountaintop thistle
31%
Cirsium eatonii
swamp thistle
31%
Cirsium muticum
pasture thistle
31%
Cirsium pumilum
Texas thistle
31%
Cirsium texanum
Greene's thistle
31%
Cirsium inamoenum
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