Collected
13 July 1990.
Texas, United States
Locality: Brewster Co., Small drainage into Terlingua Creek along Hwy 170 at Terlingua, 5.4 mi. W jct. Hwy 118 at Study Butte.
Environment description: Soft, shaley Boquillas limestone soil forming nearly barren "badlands" hills. Chihuahuan Desertscrub with Acacia greggii, A. neovernicosa, Larrea divaricata, Mimosa sp. Prosopis glandulosa var. torreyana along drainages.
Number of plants sampled: 3