Calflora, a 501c3 non-profit
Distribution by County   7683    
Sonchus tenerrimus  L.
Slender sow thistle,   Slender sowthistle
Sonchus tenerrimus is an annual herb that is not native to California.
Record Count by County

Contra Costa: 1 Napa: 1 Santa Barbara: 5 Sutter: 1
Los Angeles: 1 Orange: 2 Santa Clara: 1 Tulare: 1
Marin: 2 San Diego: 1 Solano: 2 Ventura: 2

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]. 2026. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 01/16/2026).