United States, Texas, Brazoria, Nash Ranch. 275 acre hay meadow W of CR 25, ca. 8.7 mi. N of its jct. with Hwy 35 in West Columbia.
29.25263 -95.60392
On mud sparsely vegetated places under Sapium thicket formed in an old stream channel or "swale" in the SW corner of the prairie. Occasional with Ranunculus pusillus and Callitriche peploides. Flowers white.