Calflora, a 501c3 non-profit
Distribution by County   10905    
Frangula purshiana  (DC.) A. Gray ex J.G. Cooper
Cascara buckthorn
Frangula purshiana is a tree or shrub that is native to California, and also found elsewhere in western North America.
Record Count by County

Amador: 2 Glenn: 3 Nevada: 16 Siskiyou: 57
Butte: 29 Humboldt: 141 Placer: 10 Sonoma: 14
Calaveras: 1 Lake: 1 Plumas: 177 Tehama: 7
Colusa: 1 Marin: 2 San Mateo: 13 Trinity: 41
Del Norte: 50 Mariposa: 12 Shasta: 17 Yuba: 4
El Dorado: 6 Mendocino: 86 Sierra: 26

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: 01/19/2026).