United States, Texas, Bastrop, In savanna on uplands, 0-200 ft. S of East Road, ca. 3.7-3.8 airmiles SE of jct. US Rt. 290 and F. M. 696 near Butler. Camp Swift Training Site (Texas National Guard). Elgin East Quadrangle.
30.26389 -97.27083
Common in deep, moderately well drained, slightly acid fine sandy loam Udertic Paleustalfs (Axtell Series) over claypan of Calvert Bluff Formation (Eocene), in seasonally wet recently burned savanna on uplands otherwise dominated by post oak woodland/little bluestem grassland mosaic. Associates include Andropogon ternarius, Bothriochloa saccharoides, Carex complanata, Cyperus echinatus, C. filiculmis, Dichanthelium oligosanthes, Fimbristylis puberula, Juncus marginatus, J. cf. interior, Panicum hians, Paspalum plicatulum, P. setaceum, Rhynchospora harveyi, Scleria ciliata, Stipa leucotricha, Alophia drummondii, Ambrosia psilostachya, Aster pratensis, Castilleja indivisa, Centrosema virginianum, Chamaecrista fasciculata, Commelina erecta, Daucus pusillus, Erigeron strigosus, Gaillardia aestivalis, G. punctata, Helianthemum rosmarinifolium, Lechea medium var. texanum, Monarda pectinata, Neptunia lutea, Phlox drummondii, Plantago patagonica, Polygala incarnata, Polypremum procumbens, Rudbeckia hirta, Sabatia campestris, Trichostema dichotomum, Triodanis sp., Verbena halei.