Calflora, a 501c3 non-profit
Distribution by County   2823    
California wood fern, Coastal wood fern, Shield fern
Dryopteris arguta is a fern that is native to California, and also found elsewhere in western North America.
Record Count by County

Alameda: 73 Los Angeles: 429 Riverside: 100 Siskiyou: 5
Alpine: 1 Madera: 3 Sacramento: 6 Solano: 6
Amador: 7 Marin: 289 San Benito: 34 Sonoma: 142
Butte: 107 Mariposa: 77 San Bernardino: 48 Sutter: 4
Calaveras: 2 Mendocino: 41 San Diego: 254 Tehama: 6
Contra Costa: 94 Merced: 1 San Francisco: 17 Trinity: 8
Del Norte: 4 Mono: 3 San Luis Obispo: 129 Tulare: 107
El Dorado: 38 Monterey: 182 San Mateo: 390 Tuolumne: 26
Fresno: 43 Napa: 45 Santa Barbara: 231 Ventura: 118
Humboldt: 31 Nevada: 27 Santa Clara: 194 Yolo: 1
Kern: 18 Orange: 212 Santa Cruz: 137 Yuba: 7
Lake: 16 Placer: 22 Shasta: 6
Lassen: 2 Plumas: 4 Sierra: 1

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: 10/05/2026).