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Distribution by County   133    
Agoseris retrorsa  (Benth.) Greene
Spear leaved agoseris, Spearleaf agoseris, Spearleaf mountain dandelion
Agoseris retrorsa is a perennial herb that is native to California, and also found elsewhere in western North America.
Record Count by County

Alameda: 10 Lake: 13 Nevada: 31 Shasta: 48
Alpine: 5 Lassen: 27 Orange: 14 Sierra: 37
Amador: 2 Los Angeles: 72 Placer: 42 Siskiyou: 31
Butte: 52 Madera: 11 Plumas: 80 Sonoma: 9
Calaveras: 11 Marin: 1 Riverside: 39 Tehama: 16
Contra Costa: 14 Mariposa: 18 San Benito: 10 Trinity: 69
El Dorado: 32 Mendocino: 12 San Bernardino: 50 Tulare: 68
Fresno: 37 Modoc: 40 San Diego: 68 Tuolumne: 23
Humboldt: 10 Mono: 1 San Luis Obispo: 16 Ventura: 49
Inyo: 1 Monterey: 20 Santa Barbara: 29 Yuba: 6
Kern: 52 Napa: 9 Santa Clara: 16

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: 03/15/2026).