| Fimbristylis autumnalis (L.) Roem. & Schult., 1817 |
| Fimbristylis autumnalis var. complanata (Retz.) Barros, 1945 |
| Fimbristylis autumnalis var. mucronulata (Michx.) Fernald, 1935 |
| Fimbristylis baldwiniana (Schult.) Torr., 1836 |
| Fimbristylis brizoides Nees & Meyen, 1842 |
| Fimbristylis bufonia (Kunth) Alain, 1965 |
| Fimbristylis capillaris (L.) A. Gray, 1848 |
| Fimbristylis capillaris var. pilosa Britton, 1888 |
| Fimbristylis caroliniana (Lam.) Fernald, 1940 |
| Fimbristylis castanea (Michx.) Vahl, 1805 |
| Fimbristylis chirigota (C. Wright) Alain, 1965 |
| Fimbristylis complanata (Retz.) Link, 1827 |
| Fimbristylis congesta Torr., 1836 |
| Fimbristylis crassipes Boeckeler, 1874 |
| Fimbristylis cylindrica Vahl, 1805 |
| Fimbristylis cymosa R. Br., 1810 |
| Fimbristylis cymosa subsp. cymosa R. Br., 1810 |
| Fimbristylis cymosa subsp. spathaceae (Roth) T. Koyama, 1964 |
| Fimbristylis cymosa var. spathacea (Roth) T. Koyama, 1964 |
| Fimbristylis darlingtoniana Pennell, 1933 |