| Buchosia Vell., 1825 |
| Buchosia aquatica Vell., 1825 |
| Eichhornia Kunth, 1843 |
| Eichhornia aquatica (Vell.) Schltdl., 1862 |
| Eichhornia azurea (Sw.) Kunth, 1843 |
| Eichhornia crassipes (Mart.) Solms, 1883 |
| Eichhornia graminea Seub., 1847 |
| Eichhornia heterosperma Alexander, 1939 |
| Eichhornia martiana Seub., 1847 |
| Eichhornia martiusiana (Roem. & Schult.) Walp., 1849 |
| Eichhornia paniculata (Spreng.) Solms, 1883 |
| Eichhornia venezuelensis Velásquez, 1972 |
| Eurystemon Alexander, 1937 |
| Eurystemon mexicanum (S. Watson) Alexander, 1937 |
| Heterandra P. Beauv., 1799 |
| Heterandra reniformis P. Beauv., 1799 |
| Heteranthera Ruiz & Pav., 1794 |
| Heteranthera acuta Willd., 1801 |
| Heteranthera alismoides Humb. ex Link, 1820 |
| Heteranthera dubia (Jacq.) MacMill., 1892 |