| Eleocharis minutissima Britton, 1920 |
| Eleocharis mitrata (Griseb.) C.B. Clarke, 1900 |
| Eleocharis montana (Kunth) Roem. & Schult., 1817 |
| Eleocharis montana subsp. montevidensis (Kunth) Osten, 1931 |
| Eleocharis montana var. nodulosa (Roth) Svenson, 1944 |
| Eleocharis montevidensis Kunth, 1837 |
| Eleocharis montevidensis f. angustior S. González & McVaugh, 1993 |
| Eleocharis montevidensis var. bolanderi (A. Gray) V.E. Grant, 1958 |
| Eleocharis montevidensis var. disciformis (Parish) V.E. Grant, 1958 |
| Eleocharis montevidensis var. montevidensis Kunth, 1837 |
| Eleocharis montevidensis var. parishii (Britton) V.E. Grant, 1958 |
| Eleocharis moorei M.T. Strong & S. González, 2000 |
| Eleocharis mutata (L.) Roem. & Schult., 1817 |
| Eleocharis nana Kunth, 1837 |
| Eleocharis nervata Svenson, 1929 |
| Eleocharis nigrescens (Nees) Kunth, 1805 |
| Eleocharis nigrescens var. minutiflora (Boeckeler) Svenson, 1937 |
| Eleocharis nodulosa (Roth) Schult., 1824 |
| Eleocharis obtusa (Willd.) Schult., 1824 |
| Eleocharis obtusetrigona (Lindl. & Nees) Steud., 1854 |