New Names: Populus fremontii ssp. fremontii
Counties: Alameda Amador Butte Calaveras Contra Costa Colusa El Dorado Fresno Glenn Humboldt Imperial Inyo Kern Lake Lassen Los Angeles Madera Mariposa Mendocino Merced Mono Monterey Napa Nevada Orange Placer Riverside Sacramento Santa Barbara San Bernardino San Benito Santa Clara Santa Cruz San Diego San Joaquin San Luis Obispo San Mateo Shasta Siskiyou Solano Sonoma Stanislaus Sutter Tehama Trinity Tulare Ventura Yolo Yuba