Related species: Onopordum acanthium ssp. acanthium
Counties: Alpine Amador Butte Calaveras El Dorado Humboldt Inyo Kern Lake Lassen Mendocino Mono Monterey Modoc Nevada Placer Plumas Riverside Sacramento Santa Barbara San Bernardino San Benito Santa Cruz San Diego San Mateo Shasta Sierra Siskiyou Sonoma Sutter Tehama Trinity Tulare Tuolumne Ventura Yolo