Parent species: Frangula californica
Synonyms: Rhamnus californica ssp. tomentella Rhamnus californica var. tomentella Rhamnus tomentella ssp. tomentella Rhamnus tomentella
Counties: Alameda Amador Butte Calaveras Contra Costa Colusa El Dorado Fresno Glenn Humboldt Inyo Kern Lake Los Angeles Madera Mariposa Mendocino Merced Mono Monterey Napa Nevada Orange Placer Plumas Riverside Sacramento Santa Barbara San Bernardino San Benito Santa Clara Santa Cruz San Diego San Joaquin San Luis Obispo San Mateo Shasta Solano Sonoma Stanislaus Sutter Tehama Trinity Tulare Tuolumne Ventura Yolo Yuba