Cirsium pulcherrimum
Cirsium pulcherrimum, the Wyoming thistle , is a North American species of plants in the tribe Cardueae within the family Asteraceae. The species is native to the western United States, primarily in the state of Wyoming but also in surrounding areas.
Cirsium pulcherrimum is a perennial herb up to 90 cm tall, with a large taproot, blooming more than once. Leaves are up to 25 cm long with thin spines along the edges of the leaves. There are a few flower heads, each head with pink, purple or cream-colored disc florets but no ray florets.
;Varieties
- Cirsium pulcherrimum var. aridum D.J.Keil - Carbon, Fremont, + Sweetwater Counties in Wyoming
- Cirsium pulcherrimum var. pulcherrimum - most of species range