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bull thistle
44%
Cirsium vulgare
dwarf thistle
42%
Cirsium drummondii
wavy-leaf thistle
40%
Cirsium undulatum
fringed thistle
37%
Cirsium clavatum
peregrine thistle
35%
Cirsium cymosum
few-leaf thistle
35%
Cirsium remotifolium
Arizona thistle
33%
Cirsium arizonicum
prairie thistle
33%
Cirsium canescens
fountain thistle
31%
Cirsium fontinale
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