Ludwigia polycarpa Short & R. Peter. Section: Isnardia. Manyfruit Seedbox. Phen: Jun-Sep; Jul-Oct. Hab: Wet meadows, swales. Dist: MA, CT, and w. VT west to s. ON, MI, WI, MN, and c. NE, south to c. VA, KY, s. IL, s. MO, and e. KS.

Origin/Endemic status: Native

Taxonomy Comments: This species is tetraploid (n = 16).

Synonymy: = C, F, FNA10, G, GrPl, GW2, Il, K1, K3, K4, Mi, NE, Pa, S, Peng (1989), Wagner, Hoch, & Raven (2007)

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