Collected
21 May 1992.
California, United States
Locality: Imperial Co., Mt. Spring exit from I-8, S of E-bound lanes. 32 40'25"N, 116 05'51"W. 860 m elevation.
Environment description: Rocky granitic soil with Agave deserti, Nolina bigelovii, Yucca schidigera, Opuntia acanthocarpa, Encelia farinosa, Eriogonum spp. Lower Colorado River Valley Subdivision Sonoran Desertscrub.
Number of plants sampled: 12