Calflora, a 501c3 non-profit
Distribution by County   7187    
Rosa spithamea  S. Watson
Ground rose,   Sonoma rose
Rosa spithamea is a shrub that is native to California, and endemic (limited) to California.
Record Count by County

Alameda: 14 Lake: 26 San Luis Obispo: 59 Sonoma: 32
Butte: 6 Los Angeles: 1 San Mateo: 26 Tehama: 1
Calaveras: 1 Marin: 42 Santa Clara: 23 Trinity: 5
Contra Costa: 16 Mariposa: 2 Santa Cruz: 23 Tulare: 5
El Dorado: 2 Mendocino: 10 Shasta: 3 Tuolumne: 2
Fresno: 2 Monterey: 7 Siskiyou: 2 Yuba: 1
Humboldt: 6 Napa: 16 Solano: 4

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]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 04/01/2025).