Calflora, a 501c3 non-profit
Distribution by County   10161    
Onopordum acanthium  L.
Scotch cottonthistle
Onopordum acanthium is a perennial herb that is not native to California.
Cal-IPC rating: high
Record Count by County

Alpine: 19 Lassen: 1083 Sacramento: 1 Siskiyou: 112
Amador: 2 Mendocino: 5 San Benito: 9 Sonoma: 4
Butte: 1 Modoc: 634 San Bernardino: 1 Sutter: 1
Calaveras: 12 Mono: 26 San Diego: 2 Tehama: 2
El Dorado: 3 Monterey: 9 San Mateo: 2 Trinity: 3
Humboldt: 1 Nevada: 51 Santa Barbara: 2 Tulare: 52
Inyo: 2 Placer: 67 Santa Cruz: 1 Tuolumne: 6
Kern: 10 Plumas: 11 Shasta: 84 Ventura: 19
Lake: 17 Riverside: 1 Sierra: 33 Yolo: 1

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).