United States, Texas, Hidalgo, 50-500 ft. N of old Military Highway, 300-500 ft. W of Sam Fordyce Rd., ca. 1.7-1.8 airmiles SE of jct. US Rt. 83 and F. M. 886 at Sullivan City. Lower Rio Grande Valley National Wildlife Refuge, Sam Fordyce North Tract, Sullivan City Quadrangle.
26.25667 -98.53194
Frequent in well drained, limy, calcareous fine sandy loam Aridic Ustochrepts (McAllen Series) over gravel and caliche of Goliad Formation (Pliocene), openings in mixed thorny shrubland on undulating upland. Woody associates include Acacia berlandieri, Acacia rigidula, Aloysia macrostachya, Castela erecta ssp. texana, Celtis pallida, Cordia boissieri, Croton humilis, Croton incanus, Diospyros texana, Ericameria austrotexana, Eysenhardtia texana, Forestiera angustifolia, Guaiacum angustifolium, Karwinskia humboldtiana, Lantana sp., Leucophyllum frutescens, Lippia graveolens, Macrosiphonia macrosiphon, Parkinsonia texana, Phaulothamnus spinescens, Pithecellobium pallens, Prosopis glandulosa, Salvia ballotiflora, Schaefferia cuneifolia, Tiquilia canescens, Viguiera stenoloba, Yucca treculeana, Zanthoxylum fagara.