Related species: Polystichum imbricans ssp. imbricans Polystichum imbricans ssp. curtum
Counties: Alameda Butte Calaveras Contra Costa Colusa Del Norte El Dorado Fresno Glenn Humboldt Kern Lake Los Angeles Madera Marin Mariposa Mendocino Monterey Napa Nevada Orange Placer Plumas Riverside Santa Barbara San Bernardino San Benito Santa Clara Santa Cruz San Diego San Luis Obispo San Mateo Shasta Sierra Siskiyou Sonoma Tehama Trinity Tulare Tuolumne Ventura Yuba