Collected
23 May 1992.
California, United States
Locality: San Diego Co., Hwy 78, E of Tamarisk Grove, 0.3 mi. W of MP 78. N of road in broad sandy arroyo. Anza Borrego Desert State Park.
Environment description: Sandy soil with Psorothamnus schottii, P. spinosus. Lower Colorado River Valley Subdivision Sonoran Desertscrub.
Number of plants sampled: 2