Plant Communities: Mixed Evergreen Forest Coastal Prairie
Synonyms: Cirsium quercetorum var. mendocinum Cirsium quercetorum var. quercetorum Cirsium quercetorum var. walkerianum Cirsium quercetorum var. xerolepis Cirsium walkerianum
Counties: Alameda Contra Costa Humboldt Lake Marin Mendocino Monterey Napa Sacramento San Benito Santa Cruz San Francisco San Luis Obispo San Mateo Sierra Solano Sonoma