United States, Texas, McMullen, Ca. 2.5 airmiles NW to NNW of HQ, ca. 4.7-4.8 airmiles NE of SW corner of county, at N28o06'59.7", W098o45'30.0". Piedra Creek SE Quadrangle.
28.11658 -98.75833
Local in unshaded swales on clayey alluvial soils supporting a mix of exotics-dominated grasslands and wildlife food plots, on broad floodplain of Nueces River in NW part of U. S. Navy's Escondido Ranch. Associates include Rumex pulcher, Marsilea sp., Stachys crenata, Lythrum alatum, Persicaria sp.