Calflora, a 501c3 non-profit
Distribution by County   4196    
Hirschfeldia incana  (L.) Lagr.-Fossat
Mediterranean hoary mustard, Short podded mustard, Summer mustard, Wild mustard
Hirschfeldia incana is a perennial herb that is not native to California.
Cal-IPC rating: moderate
Record Count by County

Alameda: 220 Lake: 20 Plumas: 27 Siskiyou: 96
Amador: 14 Los Angeles: 1252 Riverside: 1237 Solano: 22
Butte: 75 Madera: 74 Sacramento: 88 Sonoma: 42
Calaveras: 20 Marin: 301 San Benito: 301 Stanislaus: 49
Colusa: 9 Mariposa: 34 San Bernardino: 380 Sutter: 25
Contra Costa: 98 Mendocino: 16 San Diego: 2231 Tehama: 34
Del Norte: 6 Merced: 59 San Francisco: 70 Trinity: 5
El Dorado: 39 Modoc: 7 San Joaquin: 21 Tulare: 196
Fresno: 177 Mono: 5 San Luis Obispo: 274 Tuolumne: 9
Glenn: 17 Monterey: 308 San Mateo: 372 Ventura: 615
Humboldt: 14 Napa: 18 Santa Barbara: 160 Yolo: 24
Inyo: 24 Nevada: 46 Santa Clara: 334 Yuba: 18
Kern: 745 Orange: 427 Santa Cruz: 177
Kings: 33 Placer: 25 Shasta: 23

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: 04/22/2026).