United States, Texas, Bexar, Government Canyon State Natural Area. Bottom of Government Creek canyon, along the road which runs through the W side of the Natural Area, near Twin Oaks Trail.
29.56778 -98.76778
Scoured creek bottom with Quercus fusiformis, Juglans microphylla, Ulmus crassifolia, Vitis monticola, Melia azedarach. Brittle perennial. Ray flts white w/ pinkish cast, disk flts yellow. In full sun, in gravel of major drainage.