United States, Texas, Webb, NE side of Presa Grande, ca. 1.7-1.8 roadmiles W of Mines Road from a point 9.0 roadmiles N of bridge over Llave Creek. Trevio Ranch.
27.89581 -99.86683
In clay along unshaded margin of large stock tank on rolling landscape underlain by El Pico Clay. Associates include Acacia minuata, Chloracantha spinosa, Ciclospermum leptophyllum, Cynodon dactylon, Eleocharis sp. (27542), Heteranthera dubia, Ludwigia peploides, Lycium carolinianum, Nympaea (odorata?), Prkinsonia aculeata, Phyla nodiflora, Teucrium cubense, Tridens albescens.