United States, Texas, McMullen, Along N-S road parallel to and 1/4 mile W of eastern boundary fence of U. S. Navy's Escondido Ranch, ca. 0.6 airmiles N of center of Rowland Lake, ca. 3.2 airmiles E of ranch HQ, ca. 7.3 airmiles ENE of SW corner of county, at N28o05'01.1", W098o41'18.9".
28.08364 -98.68858
Locally common in bed of jeep road through medium-stature thorn shrubland on stony soils on very gently undulating rocky upland underlain by calcareous sandstone of the Frio Formation. Associates include Acacia berlandieri, A. rigidula, Acleisanthes anisophylla, Aristida sp., Berberis trifoliolata, Chamaesyce cinerascens, Cynanchum barbigerum, Echinocereus enneacanthus, Ephedra antisyphilitica, Forestiera angustifolia, Guaiacum angustifolium, Isocoma drummondii, Jatropha dioica, Leucophyllum frutescens, Oxalis dichondrifolia, Passiflora tenuiloba, Prunus minutiflora, Tiquilia canescens.