Polystichum munitum

Western sword fern

Family: Dryopteridaceae · Type: perennial · Native

Western sword fern is a native perennial found in northwestern California, northern Sierra Nevada, northern High Sierra Nevada, central western California, northern Channel Islands, Transverse Ranges, and Modoc Plateau, including caves in Lava Beds National Monument, on wooded hillsides and shaded slopes at elevations up to 1,600 meters. While not producing flowers, this fern is distinguished by its impressive fronds reaching 50 to 120 centimeters long, forming dense, arching clusters of dark green foliage. Growing with a robust, upright habit, it develops a distinctive lanceolate blade with pinnae arranged in a single plane, creating a graceful, feather-like structure. Its leaves feature a stipe (stem) that comprises one-fifth to one-half of the blade length, with a base of ovate scales that persist and provide structural complexity. The fern's dense, layered fronds create rich green carpets in forest understories, making it a quintessential indicator of moist, shaded woodland environments.

Habitat: Common. Wooded hillsides, shaded slopes, rarely cliffs, outcrops

Elevation: < 1600 m

Bioregions: NW, n SNF, n&amps SNH, CW, n ChI, TR, MP (caves in Lava Beds National Monument)

California counties: San Luis Obispo, San Bernardino, Sonoma, Santa Barbara, San Mateo, Siskiyou, Santa Cruz, Trinity, San Francisco, Mendocino, Monterey, Los Angeles, Alameda, Contra Costa, Del Norte, Humboldt, Marin, Santa Clara, Tulare, Plumas, Sierra, Riverside, Butte, El Dorado, Napa, Nevada, Lake, Shasta, Tuolumne, Calaveras, Yuba, Tehama, Colusa, Mariposa, Ventura, San Diego, Placer

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Jepson eFlora, Cal-IPC, and more.