| Rhynchospora clarkei Rose, 1908 |
| Rhynchospora colorata (L.) H. Pfeiff., 1935 |
| Rhynchospora consanguinea (Kunth) Boeckeler, 1873 |
| Rhynchospora contracta (Nees) J. Raynal, 1978 |
| Rhynchospora corymbosa (L.) Britton, 1892 |
| Rhynchospora costaricensis Boeckeler, 1896 |
| Rhynchospora cyperoides (Sw.) Mart., 1816 |
| Rhynchospora distans (Michx.) Vahl, 1806 |
| Rhynchospora divergens Chapm. ex M.A. Curtis, 1849 |
| Rhynchospora dives Standl., 1938 |
| Rhynchospora drummondiana Steud., 1855 |
| Rhynchospora durangensis Kral & W.W. Thomas, 1986 |
| Rhynchospora dussiana Boeckeler, 1890 |
| Rhynchospora dussii Duss, 1896 |
| Rhynchospora ecuadorensis C.B. Clarke, 1904 |
| Rhynchospora emaciata (Nees) Boeckeler, 1870 |
| Rhynchospora epiglobosa C.B. Clarke, 1908 |
| Rhynchospora exigua Boeckeler, 1894 |
| Rhynchospora eximia (Nees) Boeckeler, 1873 |
| Rhynchospora fascicularis (Michx.) Vahl, 1805 |