About Acmispon rigidus (Benth.) Brouillet
Acmispon rigidus (Benth.) Brouillet is a perennial herbaceous plant that reaches 0.5 to 1.5 meters in height. Its leaves are irregularly pinnate or palmate, with three or five leaflets that measure 5 to 17 millimeters long. Its flowers are yellow to cream when young, and turn red or purple as they age. This species is distributed across the southwestern United States, including Arizona, California, Nevada, and Utah, as well as northwestern Mexico. It grows in the Mojave Desert extending north to Inyo County, California, and the Sonoran Desert extending south to the Baja California Peninsula. It inhabits dry slopes, desert dry washes, Joshua tree woodland, and pinyon-juniper woodland communities, all at elevations below 6,000 feet above sea level.
