United States, Texas, Bexar, On partially shaded W bank of San Geronimo Creek, ponded stretch ca. 150 ft. upstream from (N of) dam on largest (N-most) pond on Gallagher Ranch, ca. 0.6 airmiles NNE of ranch HQ, 0.8 mi SW of St. Rt. 16 bridge over major tributary at village of San Gero
29.6125 -98.80444
Locally common in wet silty soils on partially shaded bank of Creek.