Dryopteris arguta
California wood fern
Photo by Chez Brungraber
Family: Dryopteridaceae · Type: Herb · Native
Dryopteris arguta (California wood fern) is a native California herb in the Dryopteridaceae family, recognized by . Distinguished by blade shape (lanceolate vs deltate) and pinna proportions.
California wood fern is a native perennial found in northwestern California, the Sierra Nevada, Sutter Buttes, central and southern coastal California, southern California mountains, and southern Mojave Desert in open, wooded slopes and caves at elevations below 2,500 meters. Growing with large, distinctive fern fronds 30 to 60 centimeters long and up to 18 centimeters wide, this fern has a lanceolate blade that is intricately 1 to 2-pinnate with the longest pinnae typically located near the blade base. Its fronds feature minutely glandular midribs and stipes, with lance-ovate to lanceolate scales covering the pinna midribs. The fern's pinnae have segments with deeply pinnately lobed edges, some with distinctive bristle-like tooth tips that add texture to its elegant structure. Its complex leaf architecture allows it to thrive in diverse woodland and cave environments across multiple California bioregions.
Identification and appearance
Key characters: 2 sympatric species. Distinguished by blade shape (lanceolate vs deltate) and pinna proportions
Habitat and range
Habitat: Locally common. Open, wooded slopes, caves
Elevation: < 2500 m
California counties: Tuolumne, San Bernardino, Riverside, San Diego, Santa Clara, Santa Barbara, Santa Cruz, Tulare, Ventura, Sonoma, San Luis Obispo, San Mateo, Los Angeles, Orange, Nevada, Alameda, Butte, El Dorado, Fresno, Humboldt, Inyo, Kern, Lake, Madera, Marin, Mariposa, Mendocino, Monterey, Napa, San Benito, San Francisco, Siskiyou, Trinity, Contra Costa, Yuba, Amador, Placer, Calaveras, Sutter, Plumas, Sierra, Solano, Sacramento, Del Norte, Yolo, Alpine, Tehama, Stanislaus
Outside California: to British Columbia, Arizona
How to tell it apart
vs Pteridium: Dryopteris has round spore covers on frond undersides; bracken fern has continuous spore lines hidden under rolled leaf edges.; vs Athyrium: Dryopteris spore covers are kidney-shaped and attached at the notch; lady ferns have curved, elongated spore clusters.; vs Polystichum: Run your hand along the frond—Dryopteris feels smooth, Polystichum feels distinctly prickly from bristle-tipped teeth.; vs Polypodium: Dryopteris has kidney-shaped covers over spore dots; polypody has naked round spore dots with no covering.; vs Woodwardia: Dryopteris has scattered round spore covers; chain fern has elongated spore clusters arranged in parallel chain-like rows.
Frequently asked questions
Is Dryopteris arguta native to California?
Yes. Dryopteris arguta is native to California (recorded as native).
Where in California does Dryopteris arguta grow?
Dryopteris arguta occurs in Tuolumne, San Bernardino, Riverside, San Diego, Santa Clara, Santa Barbara, Santa Cruz, Tulare and other counties, at elevations of < 2500 m.
What plant family does Dryopteris arguta belong to?
Dryopteris arguta is in the Dryopteridaceae family, genus Dryopteris.
What habitat does Dryopteris arguta grow in?
Dryopteris arguta grows in Locally common. Open, wooded slopes, caves.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · Index of California Plant Names · CalPhotos
Last updated 2026-10-07
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.