logo Calflora, a 501c3 non-profit
Taxon  Report  
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.
Siskiyou Del Norte Modoc Humboldt Shasta Lassen Trinity Plumas Tehama Butte Mendocino Glenn Sierra Yuba Lake Nevada Colusa Placer Sutter El Dorado Yolo Alpine Napa Sonoma Sacramento Mono Amador Solano Calaveras Tuolumne San Joaquin Marin Contra Costa Alameda Santa Cruz Mariposa Madera San Francisco San Mateo Merced Fresno Stanislaus Santa Clara Inyo San Benito Tulare Kings Monterey San Bernardino San Luis Obispo Kern Santa Barbara Ventura Los Angeles Riverside Orange San Diego Imperial
Genus: Dryopteris
Family: Dryopteridaceae  
Category: fern  
PLANTS group:Fern
Jepson eFlora section: fern

Wetlands: Occurs usually in wetlands, occasionally in non wetlands

Communities: Redwood Forest, Mixed Evergreen Forest, wetland-riparian

Name Status:
Accepted by JEF + PLANTS
Alternate Names:
JEF + PLANTSDryopteris assimilis
PLANTSDryopteris dilatata ssp. americana
PLANTSDryopteris dilatata
PLANTSDryopteris spinulosa var. dilatata
Information about  Dryopteris expansa from other sources
Nursery availability from CNPLX
This plant is available commercially.
Jepson eFlora

USDA PLANTS Profile (DREX2)

Photos on Calflora

Photos on CalPhotos

Google Images

Photos on iNaturalist

ID Tips on PlantID.net


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]. 2023. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 02/05/2023).