United States, Texas, Pecos, Along a well-pad road in NE corner of Diamond Y Preserve, ca. 0.7-0.8 airmiles WNW of St. Rt. 18 crossing of Diamond Y Draw, N of Fort Stockton, at N31o02'45.2", W102o53'54.5". Diamond Y Spring Quadrangle.
31.04589 -102.89847
Rare in moist clay on unshaded margin of tiny stock tank in mesquite-invaded grassland on gentle slope underlain by Cretaceous limestone of the Washita Group. Associates include Leptochloa sp., Echinochloa colona, Tamarix sp., Cynodon dactylon, Tridens albescens, Eragrostis lehmanniana.