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tall thistle
89%
 Cirsium altissimum
 
Anderson's thistle
89%
 Cirsium andersonii
 
Franciscan thistle
89%
 Cirsium andrewsii
 
Wyoming thistle
89%
 Cirsium pulcherrimum
 
Canada thistle
89%
 Cirsium arvense
 
Palouse thistle
89%
 Cirsium brevifolium
 
clustered thistle
89%
 Cirsium brevistylum
 
Douglas' thistle
89%
 Cirsium douglasii
 
few-leaf thistle
89%
 Cirsium remotifolium
 
fountain thistle
89%
 Cirsium fontinale
 
graygreen thistle
89%
 Cirsium cymosum
 
soft thistle
89%
 Cirsium carolinianum
 
fringed thistle
89%
 Cirsium clavatum
 
Greene's thistle
88%
 Cirsium inamoenum
 
field thistle
88%
 Cirsium discolor
 
dwarf thistle
88%
 Cirsium drummondii
 
edible thistle
88%
 Cirsium edule
 
Flodman's Thistle
87%
 Cirsium flodmanii
 
elk thistle
87%
 Cirsium foliosum
 
Graham's thistle
87%
 Cirsium grahamii
 
white thistle
87%
 Cirsium hookerianum
 
horrid thistle
87%
 Cirsium horridulum
 
Suisun thistle
86%
 Cirsium hydrophilum
 
bull thistle
85%
 Cirsium vulgare
 
Le Conte's thistle
85%
 Cirsium lecontei
 
swamp thistle
85%
 Cirsium muticum
 
New Mexico thistle
84%
 Cirsium neomexicanum
 
Nuttall's thistle
84%
 Cirsium nuttallii
 
cobwebby thistle
84%
 Cirsium occidentale
 
yellowspine thistle
84%
 Cirsium ochrocentrum
 
European marsh thistle
84%
 Cirsium palustre
 
Parry's thistle
84%
 Cirsium parryi
 
mountaintop thistle
84%
 Cirsium eatonii
 
sand dune thistle
84%
 Cirsium pitcheri
 
prairie thistle
84%
 Cirsium canescens
 
Arizona thistle
83%
 Cirsium arizonicum
 
pasture thistle
83%
 Cirsium pumilum
 
Alameda County thistle
83%
 Cirsium quercetorum
 
sandhill thistle
83%
 Cirsium repandum
 
Virginia thistle
83%
 Cirsium virginianum
 
Texas thistle
82%
 Cirsium texanum
 
meadow thistle
82%
 Cirsium scariosum
 
wavy-leaf thistle
82%
 Cirsium undulatum
 
Mojave thistle
81%
 Cirsium mohavense
 
Wheeler's thistle
81%
 Cirsium wheeleri
 
 
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