Calflora, a 501c3 non-profit
Distribution by County   7153    
Ricinus communis  L.
Castor bean,   Castorbean
Ricinus communis is a shrub that is not native to California.
Cal-IPC rating: limited
Record Count by County

Alameda: 17 Marin: 1 San Bernardino: 67 Solano: 2
Butte: 5 Merced: 1 San Diego: 1580 Stanislaus: 1
Colusa: 1 Monterey: 10 San Francisco: 2 Sutter: 3
Contra Costa: 23 Napa: 3 San Joaquin: 2 Tulare: 10
Fresno: 3 Orange: 2866 San Luis Obispo: 61 Ventura: 358
Imperial: 1 Placer: 1 San Mateo: 6 Yolo: 5
Kern: 4 Riverside: 112 Santa Barbara: 128
Los Angeles: 2386 Sacramento: 1 Santa Clara: 23
Madera: 1 San Benito: 2 Santa Cruz: 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: 11/10/2025).