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bull thistle
54%
Cirsium vulgare
Canada thistle
48%
Cirsium arvense
mountaintop thistle
47%
Cirsium eatonii
graygreen thistle
37%
Cirsium cymosum
Greene's thistle
37%
Cirsium inamoenum
wavy-leaf thistle
33%
Cirsium undulatum
meadow thistle
32%
Cirsium scariosum
dwarf thistle
31%
Cirsium drummondii
New Mexico thistle
30%
Cirsium neomexicanum
Douglas' thistle
30%
Cirsium douglasii
Palouse thistle
29%
Cirsium brevifolium
camas
28%
Camassia quamash
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