United States, Texas, Pecos, W side of road from N gate, 500 ft. SW of that gate, ca. 0.6-0.7 airmiles NNW of St. Rt. 18 bridge over Diamond Y Draw. Diamond Y Spring Preserve. Diamond Y Spring Quadrangle.
31.04967 -102.88906
Locally common on shallow gravelly clay on short gentle slopes between flat benches on limestone upland. Associates include Acacia sp., Acleisanthes longiflora, A. wrightii, Aristida purpurea, Bouteloua trifida, Croton pottsii, Dalea formosa, Gutierrezia sp., Krameria grayi, Larrea tridentata, Panicum hallii, Parthenium incanum, Polygala macradenia, Tiquilia canescens, Zinnia acerosa.