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European marsh thistle
50%
Cirsium palustre
Parry's thistle
50%
Cirsium parryi
sand dune thistle
41%
Cirsium pitcheri
pasture thistle
38%
Cirsium pumilum
Palouse thistle
37%
Cirsium brevifolium
prairie thistle
35%
Cirsium canescens
mountaintop thistle
35%
Cirsium eatonii
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
sandhill thistle
33%
Cirsium repandum
meadow thistle
33%
Cirsium scariosum
Wheeler's thistle
33%
Cirsium wheeleri
Arizona thistle
31%
Cirsium arizonicum
Canada thistle
31%
Cirsium arvense
graygreen thistle
31%
Cirsium cymosum
Douglas' thistle
31%
Cirsium douglasii
swamp thistle
31%
Cirsium muticum
Texas thistle
31%
Cirsium texanum
bull thistle
31%
Cirsium vulgare
Greene's thistle
31%
Cirsium inamoenum
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