Calflora, a 501c3 non-profit
Distribution by County   1144    
Brassica nigra  (L.) W. D. J. Koch
Black mustard
Brassica nigra is an annual herb that is not native to California.
Cal-IPC rating: moderate
Record Count by County

Alameda: 122 Kings: 11 Plumas: 6 Sierra: 1
Amador: 3 Lake: 21 Riverside: 52 Siskiyou: 95
Butte: 74 Los Angeles: 1010 Sacramento: 33 Solano: 45
Calaveras: 9 Madera: 32 San Benito: 34 Sonoma: 80
Colusa: 35 Marin: 89 San Bernardino: 100 Stanislaus: 45
Contra Costa: 103 Mariposa: 127 San Diego: 492 Sutter: 18
Del Norte: 8 Mendocino: 46 San Francisco: 117 Tehama: 35
El Dorado: 14 Merced: 90 San Joaquin: 44 Trinity: 23
Fresno: 123 Modoc: 7 San Luis Obispo: 269 Tulare: 70
Glenn: 34 Monterey: 161 San Mateo: 120 Tuolumne: 77
Humboldt: 41 Napa: 29 Santa Barbara: 145 Ventura: 561
Imperial: 1 Nevada: 12 Santa Clara: 136 Yolo: 54
Inyo: 1 Orange: 492 Santa Cruz: 30 Yuba: 20
Kern: 109 Placer: 13 Shasta: 43

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]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/09/2024).