LUDWIGIANTHA ARCUATA (Walt.).
Ludwigia arcuata Walt. Fl. Car. 89. 1788.
Luchingra pedunculosa Michx. Fl. Bor. Am. I: 88. 1803. Isnardia pedunculosa DC. Prodr. 3: 6o. 1828.
Swamps and marshes, Virginia to Florida.