Calflora, a 501c3 non-profit
Distribution by County   2134    
Cirsium hydrophilum  (Greene) Jeps.  var. vaseyi  (A. Gray) J. T. Howell
Mt. Tamalpais thistle,   Vasey's thistle
Cirsium hydrophilum var. vaseyi is a perennial herb that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).   CNDDB
Record Count by County

Marin: 47 San Francisco: 2

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]. 2022. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: 11/28/2022).