Brad Atchison
The Thistles, divided into the several weedy thistles:
Bull Thistle
Canada thistle
Musk thistle
See also some pictures of these thistles on the Agronomy 317 Weed
Identification pages:
Canada thistle
Musk Thistle
Bull Thistle
Thistle taxa
a. Cirsium spp. taxa
- Canada thistle (Cirsium arvense)
- Bull thistle (Cirsium vulgare)
- Tall thistle (Cirsium altissiumum)
- Flodman thistle (Cirsium flodmani)
b. Carduus spp. taxa
- Musk thistle (Carduus nutans)
- Plumeless thistle (Carduus acanthoides)
c. Taxa: complex of associated species or demography
©2000