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Taxon  Report  
Arnica chamissonis  Less.
Chamisso arnica
Arnica chamissonis is a perennial herb that is native to California, and also found elsewhere in North America and beyond.
Siskiyou Del Norte Modoc Humboldt Shasta Lassen Trinity Plumas Tehama Butte Mendocino Glenn Sierra Yuba Lake Nevada Colusa Placer Sutter El Dorado Yolo Alpine Napa Sonoma Sacramento Mono Amador Solano Calaveras Tuolumne San Joaquin Marin Contra Costa Alameda Santa Cruz Mariposa Madera San Francisco San Mateo Merced Fresno Stanislaus Santa Clara Inyo San Benito Tulare Kings Monterey San Bernardino San Luis Obispo Kern Santa Barbara Ventura Los Angeles Riverside Orange San Diego Imperial

Bloom Period
Genus: Arnica
Family: Asteraceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Toxicity: Do not eat any part of this plant.

Wetlands: Occurs usually in wetlands, occasionally in non wetlands

Communities: Yellow Pine Forest, Red Fir Forest, Lodgepole Forest, Subalpine Forest, Bristle-cone Pine Forest, wetland-riparian

Name Status:
Accepted by JEF + PLANTS

Alternate Names:
JEFArnica bernardina
JEFArnica chamissonis ssp. foliosa
JEFArnica chamissonis var. bernardina
ICPNArnica foliosa var. incana
ICPNArnica foliosa
Information about  Arnica chamissonis from other sources
Nursery availability from CNPLX
This plant is available commercially.
Jepson eFlora


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[Wikipedia] Seed Details & Vigor, Toxin, Etymology: Arnica chamissonis has an active bloom period throughout the summer. There are approximately 400,000 seeds per pound. These individuals have a medium seedling vigor and a moderate vegetative spread rate. Seedling vigor refers to "the expected seedling survival percentage of the plant compared to other species with the same growth habit." A vegetative spread rate refers to how quickly a plant can spread through a given area. In general, A. chamissonis can be grown in a container, by using seeds or sprigs. Both A. montana and A. chamissonis contain the toxin helenalin. The species is named for German poet and botanist Adelbert von Chamisso, 1781?1838. (contributed by Mary Ann Machi)

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 05/20/2024).