United States, Texas, Culberson, Guadalupe Mts. Nat'l Park; upper part of S. McKittrick drainage. Ca. 50 m. down from Guadalupe trail crossing streambed. 3.1 km. W, 0.4 km. E of summit of Lost Peak.
Boulders and cobbles in dry streambed, bordered by riparian forest of Acer grandidentatum, Ostrya knowltonii, Pseudotsuga menziesii, Quercus gambelii, and Pinus strobiformis.