United States, Texas, Val Verde, E edge of Devils River 0.3 airmiles N to NNW of TPWD bunkhouse, ca. 0.3 airmiles S of gauging station at Pafford Crossing, ca. 8-9 airmiles NW of jct. US Rt. 277 and road to Rough Canyon Recreation Area. SW part of Devils River State Natural Area Southern
29.67506 -100.00142
On dry unshaded outcrops of Salmon Peak Limestone, on sparsely vegetated shelves within scour plain of flood-prone stream. Associates included Acacia rigidula, Calliandra conferta, Erigeron modestus, Porophyllum scoparium, Thymophylla micropoides.