Cirsium barnebyi, or Barneby's thistle, is a North American plant species native to the Rocky Mountains of the western United States. (wikipedia.org)
Cirsium barnebyi is a sparsely-branched perennial herb up to 60 cm (24 in) tall, with a woody taproot. (wikipedia.org)
Flora of North America, Barneby's thistle, Cirsium barnebyi S. L. Welsh & Neese, Biota of North America Program 2014 county distribution map Welsh, Stanley Larson, & Neese, Elizabeth C. 1981. (wikipedia.org)
Cirsium barnebyi occurs from the southern Rocky Mountains of southwestern Wyoming, northeastern Utah, and northwestern Colorado. (asu.edu)