| Eleocharis R. Br., 1810 |
| Eleocharis aciculariformis Greenm., 1899 |
| Eleocharis acicularis (L.) Roem. & Schult., 1817 |
| Eleocharis acicularis var. acicularis (L.) Roem. Schult., 1817 |
| Eleocharis acicularis var. bella Piper, 1901 |
| Eleocharis acicularis var. lindheimeri C.B. Clarke ex Britton, 1889 |
| Eleocharis acicularis var. minima Torr. ex Britton, 1889 |
| Eleocharis acicularis var. occidentalis Svenson, 1929 |
| Eleocharis acicularis var. radicans (A. Dietr.) Britton, 1889 |
| Eleocharis acutangula (Roxb.) Schult., 1824 |
| Eleocharis acutangula subsp. acutangula (Roxb.) Schult., 1824 |
| Eleocharis acutangula subsp. breviseta D.J. Rosen, 2007 |
| Eleocharis albibracteata Nees & Meyen ex Kunth, 1837 |
| Eleocharis albida Torr., 1836 |
| Eleocharis albida var. berlandieri Britton, 1889 |
| Eleocharis albivaginata Boeckeler, 1869 |
| Eleocharis arenicola Torr. ex Engelm. & Gray, 1845 |
| Eleocharis arsenifera S. González, Tena & T. Alarcón, 2005 |
| Eleocharis articulata Kunth, 1837 |
| Eleocharis atacamensis Phil., 1860 |