United States, Texas, Walker, Ca. 0.9 airmiles N to NNW of jct. Forest Road 209 and Forest Road 208A, ca. 13 mi SW of jct. St. Rt. 30 and Interstate 45 at Huntsville. E 1/2 of Compartment 23 Sam Houston National Forest. San Jacinto Quadrangle.
30.57694 -95.68972
Common in disturbed blackland prairie on clay Vertisols, opening in loblolly pine forest. Associates include Iva annua, I. angustifolia, Carex mucronata, C. cherokeensis, Agalinis heterophylla, Aster ericoides, A. eulae, Cacalia plantaginea, Croton monanthogynus, Euphorbia marginata, Eustoma grandiflorum, Onosmodium occidentale, Salvia lyrata, Xanthocephalum sp.