Calflora, a 501c3 non-profit
Distribution by County   7681    
Sonchus asper  (L.) Hill  ssp. asper 
Prickly sow thistle,   Sow thistle
Sonchus asper ssp. asper is an annual herb that is not native to California.
Record Count by County

Alameda: 39 Kern: 13 Placer: 1 Santa Clara: 37
Alpine: 2 Kings: 1 Plumas: 1 Santa Cruz: 13
Amador: 1 Los Angeles: 29 Riverside: 35 Shasta: 3
Butte: 32 Marin: 61 Sacramento: 7 Solano: 5
Colusa: 5 Mariposa: 11 San Benito: 52 Sonoma: 33
Contra Costa: 28 Mendocino: 27 San Bernardino: 31 Sutter: 3
El Dorado: 6 Merced: 6 San Diego: 258 Tehama: 12
Fresno: 3 Mono: 1 San Francisco: 18 Tulare: 6
Glenn: 4 Monterey: 101 San Joaquin: 2 Tuolumne: 1
Humboldt: 6 Napa: 5 San Luis Obispo: 53 Ventura: 14
Imperial: 1 Nevada: 2 San Mateo: 91 Yolo: 6
Inyo: 2 Orange: 31 Santa Barbara: 14 Yuba: 5

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: 11/23/2024).