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Distribution by County   3162    
Erigeron philadelphicus  L.
Philadelphia fleabane
Erigeron philadelphicus is a perennial herb that is native to California, and also found elsewhere in North America and beyond.
Record Count by County

Alameda: 10 Lake: 4 Placer: 8 Santa Cruz: 3
Alpine: 1 Lassen: 17 Plumas: 2 Shasta: 11
Amador: 2 Los Angeles: 2 Riverside: 5 Sierra: 1
Butte: 23 Madera: 1 Sacramento: 4 Siskiyou: 35
Calaveras: 10 Marin: 1 San Benito: 2 Solano: 1
Colusa: 2 Mariposa: 1 San Bernardino: 11 Sonoma: 16
Contra Costa: 16 Mendocino: 12 San Diego: 2 Stanislaus: 2
Del Norte: 21 Merced: 2 San Joaquin: 2 Sutter: 1
El Dorado: 6 Modoc: 22 San Luis Obispo: 47 Tehama: 3
Glenn: 2 Monterey: 16 San Mateo: 3 Trinity: 9
Humboldt: 39 Napa: 9 Santa Barbara: 12 Yuba: 4
Kern: 5 Nevada: 8 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: 08/14/2026).