| Rhynchospora leucocephala (Michx.) Boeckeler, 1869 |
| Rhynchospora lindeniana Griseb., 1866 |
| Rhynchospora lindeniana var. bahamensis (Britton) Gale, 1944 |
| Rhynchospora longispicata Boeckeler, 1873 |
| Rhynchospora macrochaeta Steud. ex Boeckeler, 1873 |
| Rhynchospora macrochaeta var. ruiziana (Boeckeler) Kük., 1949 |
| Rhynchospora marisculus Lindl. & Nees ex Nees, 1842 |
| Rhynchospora marliniana Naczi, W.M. Knapp & W.W. Thomas, 2012 |
| Rhynchospora mexicana (Liebm.) Steud., 1855 |
| Rhynchospora micrantha Vahl, 1806 |
| Rhynchospora micrantha var. contracta (Nees) Kük., 1951 |
| Rhynchospora microcephala (Bertero ex Spreng.) Kük., 1951 |
| Rhynchospora minutiflora (Rich. ex Spreng.) C.D. Adams, 1971 |
| Rhynchospora nervosa (Vahl) Boeckeler, 1869 |
| Rhynchospora nervosa subsp. ciliata (G. Mey.) T. Koyama, 1970 |
| Rhynchospora nervosa subsp. nervosa (Vahl) Boeckeler, 1869 |
| Rhynchospora nervosa var. ciliata (G. Mey.) Kük., 1951 |
| Rhynchospora nervosa var. cinnamomea (Kük.) Kük., 1951 |
| Rhynchospora nervosa var. tenuifolia (Kunth) H. Pfeiff., 1935 |
| Rhynchospora nitens (Vahl) A. Gray, 1867 |