Calflora, a 501c3 non-profit
Distribution by County   683    
Arnica discoidea  Benth.
Rayless arnica
Arnica discoidea is a perennial herb that is native to California, and also found elsewhere in western North America.
Record Count by County

Alameda: 6 Lassen: 11 Plumas: 70 Solano: 7
Butte: 17 Marin: 50 San Bernardino: 2 Sonoma: 38
Colusa: 7 Mariposa: 16 San Luis Obispo: 7 Sutter: 1
Contra Costa: 31 Mendocino: 26 San Mateo: 31 Tehama: 11
Del Norte: 1 Modoc: 6 Santa Barbara: 10 Trinity: 75
El Dorado: 1 Monterey: 30 Santa Clara: 35 Tulare: 2
Fresno: 1 Napa: 25 Santa Cruz: 38 Tuolumne: 6
Glenn: 10 Nevada: 11 Shasta: 37
Humboldt: 17 Orange: 3 Sierra: 13
Lake: 32 Placer: 7 Siskiyou: 12

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).