Calflora, a 501c3 non-profit
Distribution by County   7171    
Rorippa palustris  (L.) Besser
Bog yellow cress,   Bog yellowcress
Rorippa palustris 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: 3 Los Angeles: 7 Plumas: 2 Sonoma: 1
Butte: 22 Madera: 2 Riverside: 10 Stanislaus: 3
Colusa: 2 Marin: 11 Sacramento: 4 Sutter: 4
Contra Costa: 6 Mendocino: 5 San Diego: 10 Tehama: 1
Fresno: 4 Merced: 3 San Joaquin: 4 Trinity: 1
Glenn: 1 Modoc: 1 San Luis Obispo: 27 Tulare: 2
Humboldt: 1 Mono: 1 San Mateo: 10 Tuolumne: 1
Inyo: 2 Monterey: 11 Santa Barbara: 10 Ventura: 2
Kern: 13 Napa: 3 Santa Clara: 7 Yolo: 1
Kings: 2 Nevada: 1 Santa Cruz: 7 Yuba: 1
Lake: 1 Orange: 22 Shasta: 7
Lassen: 9 Placer: 2 Solano: 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]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/11/2025).