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Distribution by County   7075    
Rhamnus crocea  Nutt.
Redberry buckthorn
Rhamnus crocea is a shrub that is native to California, and also found elsewhere in western North America.
Record Count by County

Alameda: 23 Los Angeles: 201 Sacramento: 3 Sierra: 1
Alpine: 1 Marin: 92 San Benito: 30 Solano: 3
Amador: 2 Mendocino: 6 San Bernardino: 56 Sonoma: 42
Butte: 2 Merced: 2 San Diego: 570 Tehama: 1
Colusa: 1 Monterey: 109 San Francisco: 6 Trinity: 1
Contra Costa: 20 Napa: 29 San Luis Obispo: 148 Tulare: 5
El Dorado: 4 Nevada: 2 San Mateo: 73 Tuolumne: 1
Fresno: 13 Orange: 76 Santa Barbara: 138 Ventura: 103
Kern: 10 Placer: 1 Santa Clara: 117 Yuba: 5
Lake: 4 Riverside: 172 Shasta: 3

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: 01/23/2026).