| Eleogenus nodulosus (Roth) Nees, 1842 |
| Eleogenus ochreatus Nees, 1842 |
| Eleogenus schottianus Nees, 1842 |
| Eleogenus sellowianus (Kunth) Nees, 1842 |
| Eleogiton Link, 1827 |
| Eleogiton atropurpurea (Retz.) A. Dietr., 1833 |
| Eleogiton parvula (Roem. & Schult.) Link, 1827 |
| Eleogiton radicans (Poir.) A. Dietr., 1833 |
| Elytrospermum C.A. Mey., 1831 |
| Elytrospermum californicum C.A. Mey., 1830 |
| Ephippiorhynchium Nees, 1842 |
| Ephippiorhynchium trispicatum Nees, 1842 |
| Eriophorum L., 1753 |
| Eriophorum cyperinum L., 1762 |
| Eucyperus Rikli, 1895 |
| Eucyperus schaffneri (Boeckeler) Rikli, 1895 |
| Ficiniinae Fenzl, 1836 |
| Fimbristylis Vahl, 1805 |
| Fimbristylis alamosana Fernald, 1901 |
| Fimbristylis annua (All.) Roem. & Schult., 1817 |