Calflora, a 501c3 non-profit
Distribution by County   10284    
Pteridium aquilinum  (L.) Kuhn
Western brackenfern
Pteridium aquilinum is a fern that is native to California, and also found elsewhere in North America and beyond.
Record Count by County

Alameda: 53 Kern: 19 Orange: 24 Shasta: 74
Alpine: 17 Lake: 19 Placer: 83 Sierra: 27
Amador: 14 Lassen: 15 Plumas: 85 Siskiyou: 19
Butte: 98 Los Angeles: 144 Riverside: 87 Solano: 2
Calaveras: 7 Madera: 20 San Benito: 26 Sonoma: 320
Colusa: 2 Marin: 894 San Bernardino: 77 Tehama: 21
Contra Costa: 39 Mariposa: 97 San Diego: 114 Trinity: 87
Del Norte: 9 Mendocino: 289 San Francisco: 116 Tulare: 171
El Dorado: 80 Modoc: 1 San Luis Obispo: 88 Tuolumne: 56
Fresno: 86 Mono: 18 San Mateo: 343 Ventura: 25
Glenn: 4 Monterey: 173 Santa Barbara: 131 Yolo: 1
Humboldt: 117 Napa: 19 Santa Clara: 38 Yuba: 18
Inyo: 14 Nevada: 56 Santa Cruz: 223

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).