United States, Texas, Presidio, On NW-facing rocky igneous slope and flat bench at top of slope, ca. 1-50 ft. above E side of Big Trestle Draw, Hip-O Ranch Preserve (TNC). Aragon Quadrangle.
30.36553 -104.13217
Tallish variety, leaves scabrous. Rare in Bouteloua crutipendula - B. gracilis grassland dotted with Rhus microphylla. On NW facing rocky igneous slope and flat bench at top of slope. Associates include Acacia angustissima, Acourtia wrightii, Aristida spp., Artemisia ludoviciana, Astrolepis sinuata, Bahia pedata, Berberis trifoliolata, Bothriochloa barbinodis, Bouteloua hirsuta, Brickellia sp., Buddleja scordioides, Dalea frutescens, Digitaria cognata, Dyschoriste decumbens, Hedeoma nanum, Hedyotis nigricans, Kallstroemia parviflora, Machaeranthera tanacetifolia, Mirabilis linearis, Nolina texana, Portulaca suffrutescens, Rhynchosia senna var. texana, Simsia calva, Thelesperma ambiguum, Tragia ramosa, Verbena neomexicana, Zinnia grandiflora, and Ziziphus obtusifolius.