Ludwigia microcarpa Michaux. Section: Isnardia. Small-fruited Seedbox. Phen: Jul-Oct. Hab: In circumneutral or alkaline soils of moist places, over calcareous rock, mafic rock, shell hash, or brackish sands, such as in maritime wet grasslands, savannas and adjacent ditches over coquina limestone (‘marl’), and wet clay flats over diabase, often in roadside ditches, and inland in calcareous fens and wet calcareous glades. Dist: Ne. NC south to s. FL, west to se. TX (Brown & Marcus 1998); disjunct inland on calcareous or mafic rocks in nc. NC, nc. SC, n. GA, n. AL, c. and e. TN, sc. MO, and nc. AR; also in the Bahamas, Cuba, and Jamaica.

Origin/Endemic status: Native

Taxonomy Comments: This species is diploid (n = 8).

Synonymy: = Ar, Bah, F, Fl4, FNA10, GW2, K1, K3, K4, RAB, S, Tn, W, WH3, Peng (1989), Wagner, Hoch, & Raven (2007); = n/a – C

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