Collected
23 May 1992.
California, United States
Locality: San Diego Co., Plum Canyon, ca. 1/2 mi. S of Hwy 78, Anza Borrego Desert State Park. 33 07'23.00"N, 116 25'24.21"W. 496 m elevation.
Environment description: Sandy soil along arroyo with Psorothamnus schottii, P. spinosus, Larrea divaricata subsp. tridentata. Lower Colorado River Valley Subdivision Sonoran Desertscrub.
Number of plants sampled: 4