United States, Texas, San Jacinto, Ca. 1800-2200 ft. NW of F. M. 3018 from a point 1.4 roadmiles SW of its jct. with F. M. 946, ca. 1 1/2 airmiles S of village of Oakhurst. Sam Houston National Forest, Compartment 79. Oakhurst Quadrangle.
30.71583 -95.32583
Occasional in Wiergate Clay (Vertisols) over Willis Formation, blackland prairie opening in loblolly pine forest. Associates include Agalinis heterophylla, Aster subulatus, Euphorbia marginata, Eustoma grandiflorum, Heliotropium tenellum, Iva angustifolia, Iva annua, Panicum anceps, Prunella vulgaris, Salvia azurea, Verbena xutha.