Calflora, a 501c3 non-profit
Distribution by County   1493    
Cardamine oligosperma  Nutt.
Bitter cress,   Idaho bittercress
Cardamine oligosperma is an annual or perennial herb that is native to California, and also found elsewhere in North America and beyond.
Record Count by County

Alameda: 42 Los Angeles: 40 Sacramento: 19 Solano: 8
Amador: 4 Madera: 3 San Benito: 48 Sonoma: 68
Butte: 108 Marin: 113 San Bernardino: 6 Stanislaus: 2
Calaveras: 2 Mariposa: 14 San Diego: 24 Sutter: 4
Colusa: 5 Mendocino: 61 San Francisco: 40 Tehama: 22
Contra Costa: 37 Merced: 1 San Joaquin: 2 Trinity: 18
Del Norte: 3 Monterey: 45 San Luis Obispo: 64 Tulare: 5
El Dorado: 20 Napa: 20 San Mateo: 156 Tuolumne: 8
Fresno: 10 Nevada: 17 Santa Barbara: 52 Ventura: 10
Glenn: 4 Orange: 6 Santa Clara: 46 Yolo: 9
Humboldt: 47 Placer: 15 Santa Cruz: 47 Yuba: 18
Kern: 1 Plumas: 10 Shasta: 12
Lake: 16 Riverside: 1 Sierra: 1

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: 11/21/2024).