| Rhynchospora aristata var. suberecta Kük., 1926 |
| Rhynchospora aurea Vahl, 1806 |
| Rhynchospora bahamensis Britton, 1913 |
| Rhynchospora barbata (Vahl) Kunth, 1837 |
| Rhynchospora berteroi (Spreng.) C.B. Clarke, 1900 |
| Rhynchospora boliviensis C.B. Clarke, 1908 |
| Rhynchospora borinquensis Britton, 1915 |
| Rhynchospora brevirostris Griseb., 1866 |
| Rhynchospora brevirostris var. clarkei (Rose) Kük., 1951 |
| Rhynchospora brittonii Gale, 1944 |
| Rhynchospora brownii Roem. & Schult., 1817 |
| Rhynchospora brownii subsp. americana Guagl., 1979 |
| Rhynchospora buchii C.B. Clarke, 1912 |
| Rhynchospora cephalotes (L.) Vahl, 1805 |
| Rhynchospora ciliata (Vahl) Kük., 1921 |
| 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 |