Calflora, a 501c3 non-profit
Distribution by County   2824    
Dryopteris expansa  (C. Presl) Fraser-Jenk. & Jermy
Common wood fern,   Spreading wood fern,   Spreading woodfern
Dryopteris expansa is a fern that is native to California, and also found elsewhere in North America and beyond.
Record Count by County

Del Norte: 5 Mendocino: 5 Santa Clara: 5 Sonoma: 9
Humboldt: 21 Monterey: 2 Santa Cruz: 2
Marin: 25 San Mateo: 17 Siskiyou: 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]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 11/21/2024).