Cirsium douglasii Calflora

Distribution by County 2125

Cirsium douglasii DC.

Douglas' thistle, Swamp thistle

Cirsium douglasii is a perennial herb that is native to California, and also found elsewhere in western North America.

Record Count by County


Butte: 10	Lassen: 6	Nevada: 3	Siskiyou: 12
Colusa: 8	Marin: 2	Plumas: 9	Sonoma: 33
Contra Costa: 3	Mendocino: 20	San Benito: 5	Tehama: 9
Humboldt: 13	Modoc: 2	Shasta: 3	Trinity: 36
Lake: 19	Napa: 16	Sierra: 3

Suggested Citation

Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/ (Accessed: 12/03/2024).