| Scirpus montanus Kunth, 1815 |
| Scirpus montevidensis (Kunth) Kuntze, 1891 |
| Scirpus mucronulatus Michx., 1803 |
| Scirpus mutatus L., 1759 |
| Scirpus nanus Spreng., 1815 |
| Scirpus nanus var. anachaetus (Torr.) Britton, 1892 |
| Scirpus nevadensis S. Watson, 1871 |
| Scirpus nigrescens (Nees) Nees, 1834 |
| Scirpus nitens Vahl, 1805 |
| Scirpus nodulosus Roth, 1821 |
| Scirpus obtusifolius Vahl, 1805 |
| Scirpus occidentalis (S. Watson) Chase, 1904 |
| Scirpus occidentalis var. congestus Farw., 1917 |
| Scirpus ochreatus (Nees) Griseb., 1864 |
| Scirpus olneyi A. Gray, 1847 |
| Scirpus orbicephala Beetle, 1944 |
| Scirpus pachystylus C. Wright, 1871 |
| Scirpus pacificus Britton ex Parish, 1905 |
| Scirpus paludosus A. Nelson, 1899 |
| Scirpus paradoxus (Spreng.) Boeckeler, 1870 |