Calflora, a 501c3 non-profit
Distribution by County   2139    
Cirsium occidentale  (Nutt.) Jeps.
Cobweb thistle,   Western thistle
Cirsium occidentale is a perennial herb that is native to California, and endemic (limited) to California.
Record Count by County

Alameda: 43 Lake: 23 Placer: 10 Siskiyou: 11
Alpine: 9 Lassen: 17 Plumas: 32 Solano: 3
Amador: 3 Los Angeles: 455 Riverside: 132 Sonoma: 71
Butte: 39 Madera: 18 San Benito: 129 Stanislaus: 11
Calaveras: 6 Marin: 185 San Bernardino: 116 Sutter: 4
Colusa: 14 Mariposa: 58 San Diego: 359 Tehama: 19
Contra Costa: 52 Mendocino: 45 San Francisco: 50 Trinity: 40
El Dorado: 7 Merced: 5 San Luis Obispo: 194 Tulare: 96
Fresno: 27 Modoc: 12 San Mateo: 65 Tuolumne: 23
Glenn: 5 Mono: 13 Santa Barbara: 297 Ventura: 163
Humboldt: 29 Monterey: 275 Santa Clara: 86 Yolo: 4
Inyo: 48 Napa: 17 Santa Cruz: 31 Yuba: 4
Kern: 209 Nevada: 20 Shasta: 49
Kings: 3 Orange: 243 Sierra: 26

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: 11/21/2024).