United States, Alabama, Lowndes, Blue Bluff, approx. 2 1/4 mi. NE Whitehall, on S Shore of Ala. River, in Corps of Engineers' Holy Ground Battlefield Park, in T16N, R14E, Secs. 19 & 20.
Common in large patch, in very moist prairie clay-alluvial soil; at bluff base along river, in area subject to inundation.