Pontederia cordata Linnaeus var. lancifolia (Muhlenberg ex Elliott) Torrey. Phen: May-Oct. Hab: Marshes, pond-shores, lake-shores. Dist: S. MA (alleged to occur as far north as ME, but these reports may be entirely based on misidentifications of var. cordata) to s. FL, west to e. TX, mostly on the Coastal Plain, with a few records around the Great Lakes; Cuba; s. Brazil, Argentina, Paraguay, and Uruguay.
Origin/Endemic status: Native
Taxonomy Comments: A third variety of P. cordata, var. ovalis (Martens in Roemer & J.A. Schultes) Solms, is restricted to South America.
Synonymy: = GW1, Lowden (1973); = Pontederia cordata L. var. lanceolata (Nutt.) Griseb. – Tx; = Pontederia lanceolata Nutt. – F, G, S; < Pontederia cordata L. – C, ETx1, FNA26, K1, K3, K4, NcTx, NE, Pa, RAB, Tn, W, WH3