United States, Texas, Jeff Davis, Both sides of Madera Creek ca. 1.2-1.5 airmiles southwest of its crossing of St. Rt. 118, U Up U Down Ranch, Davis Mts. Mt. Locke Quadrangle.
30.69667 -104.11667
Rare in grama-dominated grassland openings in woodland of Quercus emoryi, Juniperus deppeana, Pinus cembroides in dry sandy-gravelly soil in broad valley between igneous slopes. Associates include Anthericum torreyi, Aristida ternipes, Artemisia ludoviciana, Bahia bigelovii, Bothriochloa barbinodis, Bouteloua gracilis, B. hirsuta, Castilleja tortifolia, Cologania angustifolia, Commelina dianthifolia, Cyprus fendlerianus, Eragrostis spp., Eryngium heterophyllum, Galium microphyllum, Hedeoma nanum, Hedyotis nigricans, Hieracium fendleri, Leptochloa dubia, Lotus oroboides, Lycurus phleoides, Machaeranthera pinnatifida, Melampodium strigosum, Panicum obtusum, Paronychia jamesii, Phlox mesoleuca, Thelesperma megapotamicum, Veronica marginata.