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Parent species: Cirsium occidentale
Synonyms: Cirsium proteanum
Counties: Alameda Butte Contra Costa Colusa Fresno Glenn Humboldt Inyo Kern Lake Los Angeles Mendocino Merced Monterey Marin Napa Nevada Orange Plumas Santa Barbara San Benito Santa Clara Santa Cruz Shasta Sierra Siskiyou San Luis Obispo San Mateo Solano Sonoma Sutter Tehama Trinity Tulare Ventura Yolo
Jepson Bioregions: Desert Mountains White and Inyo Mountains North Coast Ranges Sierra Nevada Foothills High Sierra Nevada Sacramento Valley SF Bay South Coast Ranges Transverse Ranges Sierra Nevada East Mojave Desert
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