Calflora, a 501c3 non-profit
Distribution by County   7225    
Rumex salicifolius  Weinm.
Willow dock, Willow leaved dock
Rumex salicifolius is a perennial herb that is native to California, and also found elsewhere in western North America.
Record Count by County

Alameda: 26 Kings: 1 Placer: 12 Sierra: 3
Alpine: 9 Lake: 9 Plumas: 11 Siskiyou: 10
Amador: 4 Lassen: 9 Riverside: 68 Solano: 10
Butte: 15 Los Angeles: 130 Sacramento: 4 Sonoma: 14
Calaveras: 3 Madera: 3 San Benito: 157 Stanislaus: 2
Colusa: 7 Marin: 29 San Bernardino: 25 Sutter: 3
Contra Costa: 10 Mariposa: 5 San Diego: 87 Tehama: 7
Del Norte: 5 Mendocino: 19 San Francisco: 28 Trinity: 9
El Dorado: 9 Modoc: 8 San Luis Obispo: 79 Tulare: 11
Fresno: 11 Mono: 7 San Mateo: 53 Tuolumne: 11
Glenn: 1 Monterey: 89 Santa Barbara: 118 Ventura: 62
Humboldt: 6 Napa: 6 Santa Clara: 18 Yolo: 2
Inyo: 25 Nevada: 9 Santa Cruz: 24 Yuba: 2
Kern: 29 Orange: 50 Shasta: 14

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: 05/15/2026).