| Rhynchospora epiglobosa C.B. Clarke, 1908 |
| Rhynchospora exigua Boeckeler, 1894 |
| Rhynchospora eximia (Nees) Boeckeler, 1873 |
| Rhynchospora fascicularis (Michx.) Vahl, 1805 |
| Rhynchospora fascicularis var. distans (Michx.) Chapm., 1860 |
| Rhynchospora filifolia A. Gray, 1836 |
| Rhynchospora filiformis Vahl, 1806 |
| Rhynchospora floridensis (Britton ex Small) H. Pfeiff., 1940 |
| Rhynchospora gigantea Link, 1820 |
| Rhynchospora glauca Vahl, 1806 |
| Rhynchospora globosa (Kunth) Roem. & Schult., 1817 |
| Rhynchospora globularis (Chapm.) Small, 1933 |
| Rhynchospora globularis var. recognita Gale, 1944 |
| Rhynchospora gracilenta A. Gray, 1836 |
| Rhynchospora harveyi W. Boott, 1884 |
| Rhynchospora harveyi var. harveyi W. Boott, 1884 |
| Rhynchospora hassleri C.B. Clarke, 1903 |
| Rhynchospora hirsuta (Vahl) Vahl, 1806 |
| Rhynchospora hoffmannii Boeckeler, 1873 |
| Rhynchospora holoschoenoides (Rich.) Herter, 1953 |