Calflora, a 501c3 non-profit
Distribution by County   7682    
Sonchus oleraceus  L.
Common sow thistle,   Common sowthistle,   Sow thistle
Sonchus oleraceus is an annual herb that is not native to California.
Record Count by County

Alameda: 56 Kings: 1 Placer: 9 Santa Cruz: 58
Amador: 1 Lake: 2 Plumas: 1 Shasta: 2
Butte: 37 Los Angeles: 352 Riverside: 130 Sierra: 1
Calaveras: 4 Madera: 4 Sacramento: 52 Solano: 162
Colusa: 5 Marin: 165 San Benito: 54 Sonoma: 102
Contra Costa: 50 Mariposa: 17 San Bernardino: 92 Stanislaus: 4
El Dorado: 7 Mendocino: 80 San Diego: 521 Sutter: 4
Fresno: 22 Merced: 15 San Francisco: 212 Tehama: 4
Glenn: 3 Modoc: 4 San Joaquin: 10 Tulare: 23
Humboldt: 17 Monterey: 126 San Luis Obispo: 120 Tuolumne: 19
Imperial: 31 Napa: 22 San Mateo: 171 Ventura: 181
Inyo: 5 Nevada: 13 Santa Barbara: 164 Yolo: 32
Kern: 46 Orange: 178 Santa Clara: 61 Yuba: 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).