United States, Texas, Hartley, N side of Rita Blanca Lake, 100-500 ft. NW of boat ramp road leading S from F. M. 281 ca. 0.6 mi. of Lake Drive, S of Dalhart. Dalhart West Quadrangle.
36.0375 -102.50694
Corollas yellow; rare in packed sand along truck trail in grassland on unshaded outcrop of Ogalalla caliche on top of bluff. Associates include Bouteloua gracilis, Oenothera brachycarpa, Dalea purpurea, D. jamesii, Hymenoxys acaulis var. acaulis, H. scaposa var. glabra, Eriogonum lachnogynum, Hymenopappus filifolius var. cinereus, Lesquerella ovalifolia, Psilostrophe villosa, Calylophus hartwegii, Echinacea angustifolia, Paronychia jamesii, P. sessilifolia, Penstemon fendleri, P. albidus.