Didiplis diandra (Nuttall ex A.P. de Candolle) Alph. Wood. Water-purslane. Phen: Apr-Oct. Hab: Stagnant water of floodplain pools, streams, and old beaverponds. Dist: Se. VA, IN, and WI south to NC, SC, MS, LA, and e. TX; disjunct in c. peninsular FL (Wunderlin, Hansen, & Franck 2017); disjunct in Mexico. Recently found in se. PA, where considered likely to be an accidental introduction (S. Grund, pers.comm., 2019).

ID notes: This species occurs in somewhat different appearing forms, depending on water level. The species is often submersed, with flaccid stems and leaves.

Origin/Endemic status: Native

Synonymy: = Ar, C, Fl4, FNA10, G, GrPl, GW2, Il, K1, K3, K4, S, S13, Tn, Va, WH3, Graham (1975); = n/a – Pa; = Peplis diandra Nutt. ex DC. – F, RAB, Tx

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: OBL
• Eastern Mountains and Piedmont: OBL
• Great Plains: OBL
• Midwest: OBL
• Northcentral & Northeast: OBL

Heliophily ?: 8