United States, Florida, Escambia, Near Pensacola. On campus of Univ of W Fla. In shallow water of Thompson's Bayou by wooden dock at picnic area at end of old fishcamp rd NW of Bldg 58.
In shallow water. Flws white. With Zizania aquatica, Zizaniopsis miliacea, Pontederia cordata, Sagittaria lancifolia.