Total evidence phylogeny of Pontederiaceae (Commelinales) sheds light on the necessity of its recircumscription and synopsis of Pontederia L. Author Pellegrini, Marco O. O. Author Horn, Charles N. Author Almeida, Rafael F. text PhytoKeys 2018 108 25 83 http://dx.doi.org/10.3897/phytokeys.108.27652 journal article http://dx.doi.org/10.3897/phytokeys.108.27652 1314-2003-108-25 613AFFC18E03FFDEFFA1DB2FFF88FFAE 1409868 4.3. Pontederia heterosperma (Alexander) M.Pell. & C.N.Horn comb. nov. Eichhornia heterosperma Alexander, Lloydia 2: 170. 1939. Lectotype (designated here). GUIANA. Basin of Rupununi River, Wichabai, fl., fr., 25-26 Oct 1937, A.C. Smith 2290 (NY barcode NY00247522!; isolectotypes: F barcode F0047046F!, G barcode G00168031!, GH barcode GH00255059!, K barcode K000644009!, MO barcode MO-1936311!, NY barcode NY00247521!, P barcode P00730322!, S No. S05-5985!, U barcode U0005719!, US barcode US00091644!). Distribution. Antilles (Cuba), Central America (Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua and Panama) and South America (Bolivia, Colombia, Ecuador, French Guiana, Guyana and Suriname, Venezuela and Brazil - states of Acre, Amazonas, Amapa , Para , Rondonia , Tocantins, Alagoas, Bahia, Ceara , Maranhao , Paraiba , Pernambuco, Piaui , Rio Grande do Norte, Sergipe, Goias , Mato Grosso do Sul, Mato Grosso and Minas Gerais).