| Scirpus michauxii Pers., 1805 |
| Scirpus micranthus Vahl, 1805 |
| Scirpus micranthus var. humboldtii (Roem. & Schult.) Boeckeler, 1870 |
| Scirpus microcarpus J. Presl & C. Presl, 1828 |
| Scirpus minimus Pursh, 1814 |
| 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 (Lam.) Kunth, 1837 |
| Scirpus occidentalis (S. Watson) Chase, 1904 |
| Scirpus occidentalis var. congestus Farw., 1917 |
| Scirpus ochreatus (Nees) Griseb., 1864 |
| Scirpus olneyi A. Gray, 1847 |
| Scirpus orbicephalus Beetle, 1944 |