*Ludwigia hexapetala (Hooker & Arnott) Zardini, H.Y. Gu, & Raven. Section: Jussiaea. Common Water-primrose. Phen: May-Sep. Hab: Ponds, lakes, sluggish waters of ditches or streams. Dist: NC south to FL, west to OK and TX; also in CA, Europe, South America, Mexico; also introduced farther north in North America. Reported for DE and MD (Longbottom, Naczi, & Knapp 2016).

Origin/Endemic status: Neotropics

Taxonomy Comments: This taxon is decaploid (n = 40). See Zardini, Gu, and Raven (1991) and Nesom & Kartesz (2000) for additional information.

Synonymy: = FNA10, Meso4.1, NY, Pa, Wagner, Hoch, & Raven (2007), Zardini, Gu, & Raven (1991); = Ludwigia grandiflora (Michx.) Greuter & Burdet ssp. hexapetala (Hook. & Arn.) G.L.Nesom & Kartesz – Ar, K3, K4, Tn, Va, Nesom & Kartesz (2000); = Ludwigia grandiflora (Michx.) Greuter & Burdet var. hexapetala (Hook. & Arn.) D.B.Ward – Ward (2012a); = n/a – Tat; < Jussiaea uruguayensis Cambess. – F, G, WV; < Ludwigia grandiflora (Michx.) Greuter & Burdet – Fl4, WH3; < Ludwigia uruguayensis (Cambess.) Hara – C, GW2, K1, RAB, W

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: OBL (taxonomic split from wetland indicator species)
• Eastern Mountains and Piedmont: OBL (taxonomic split from wetland indicator species)
• Great Plains: OBL (taxonomic split from wetland indicator species)
• Northcentral & Northeast: OBL (taxonomic split from wetland indicator species)

Heliophily: 9