United States, Texas, McMullen, W part of U. S. Navy's Escondido Ranch, ca. 2.6 airmiles E of Nueces River crossing of La Salle County line, ca. 4.0 airmiles NE of jct. of McMullen, Duval, La Salle, and Webb county lines, at N28o06'07.6", W098o45'40.1". Piedra Creek SE Quadrangle.
28.10211 -98.76114
Seemingly rare in area but locally frequent on unshaded clayey slope of large but dry stock tank, local in bed of road through mesquite-granjeno-pricklypear shrubland on clay or silt on nearly level topography at upper edge of river floodplain.