Calflora, a 501c3 non-profit
Distribution by County   10384    
Sonchus asper  (L.) Hill
Spiny sowthistle
Sonchus asper is an annual herb that is not native to California.
Record Count by County

Alameda: 51 Kings: 3 Placer: 6 Shasta: 8
Alpine: 3 Lake: 5 Plumas: 2 Siskiyou: 1
Amador: 7 Lassen: 4 Riverside: 108 Solano: 20
Butte: 56 Los Angeles: 149 Sacramento: 38 Sonoma: 158
Calaveras: 7 Madera: 11 San Benito: 96 Stanislaus: 3
Colusa: 8 Marin: 275 San Bernardino: 106 Sutter: 8
Contra Costa: 38 Mariposa: 66 San Diego: 373 Tehama: 20
El Dorado: 19 Mendocino: 50 San Francisco: 46 Trinity: 4
Fresno: 12 Merced: 43 San Joaquin: 5 Tulare: 35
Glenn: 5 Mono: 2 San Luis Obispo: 98 Tuolumne: 32
Humboldt: 35 Monterey: 122 San Mateo: 261 Ventura: 86
Imperial: 1 Napa: 23 Santa Barbara: 113 Yolo: 9
Inyo: 46 Nevada: 9 Santa Clara: 75 Yuba: 6
Kern: 39 Orange: 151 Santa Cruz: 50

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).