Rhizomatous perennial, often some of the stems slender, floating, and glabrous, but fls produced only on erect or ascending, usually soft-hairy stems 3–6 dm; lvs alternate, those of the flowering stems lanceolate to oblanceolate, mostly 3–6 cm, on petioles seldom over 1 cm, generally hairy; pet mostly 15–25 mm; anthers 2.5–3.5 mm; otherwise much as in no. 3 [Ludwigia peploides (Kunth) P. H. Raven]. Swamps and ponds at a few stations in our range from s. N.Y. southward; N.C. to Tex., and s. to Argentina. Summer. (Jussiaea u.; J. michauxiana)
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