| Helanthium tenellum ( Mart.) Britton, 1856 |
| Hydrocleys Rich., 1815 |
| Hydrocleys nymphoides (Willd.) Buchenau, 1868 |
| Hydrocleys oblongifolia Hoehne, 1915 |
| Hydrocleys parviflora Seub., 1847 |
| Hydrocleys standleyi Steyerm., 1944 |
| Limnocharis Bonpl., 1807 |
| Limnocharis emarginata Humb. & Bonpl., 1808 |
| Limnocharis flava (L.) Buchenau, 1868 |
| Limnocharis flava var. minor Micheli, 1881 |
| Limnocharis laforestii Duchass. ex Griseb., 1858 |
| Lophiocarpus (Kunth) Miq., 1870 |
| Lophiocarpus calycinus (Engelm. ex Torr.) Micheli, 1881 |
| Lophiocarpus guyanensis Micheli, 1881 |
| Lophiocarpus seubertianus (C. Mart.) Micheli, 1881 |
| Lophotocarpus T. Durand, 1888 |
| Lophotocarpus californicus J.G. Sm., 1899 |
| Lophotocarpus calycinus (Engelm. ex Torr.) J.G. Sm., 1894 |
| Lophotocarpus depauperatus J.G. Sm., 1899 |
| Lophotocarpus fluitans (Engelm. ex Torr.) J.G. Sm., 1899 |