Cirsium grahamii, called Graham's thistle, is a North American species of plants in the tribe Cardueae within the family Asteraceae. The species is native to Sonora, Chihuahua, Durango, Nuevo León, New Mexico, and Arizona.Biota of North America Program 2014 county distribution mapTropicos, Cirsium grahamii A. Gray
Cirsium grahamii is a biennial herb up to 100 cm (40 inches) tall, blooming only once before dying. Leaves have thin spines along the edges. There is several flower heads per plant, with deep purple disc florets but no ray florets.Graham’s thistle, Flora of North America, Cirsium grahamii A.Gray
References
External links Photo of herbarium specimen collected in Nuevo León