| Scirpus bernardinus Munz & I.M. Johnst., 1925 |
| Scirpus brachyphyllus Link, 1820 |
| Scirpus brevivaginatus Boeckeler, 1858 |
| Scirpus bufonius (Kunth) Poir., 1817 |
| Scirpus californicus (C.A. Mey.) Steud., 1841 |
| Scirpus capillaris L., 1753 |
| Scirpus capitatus Willd., 1791 |
| Scirpus caribaeus Rottb., 1773 |
| Scirpus carolinianus Lam., 1791 |
| Scirpus castaneus Michx., 1803 |
| Scirpus cephalotes L., 1762 |
| Scirpus cernuus Vahl, 1805 |
| Scirpus cernuus subsp. californicus (Torr.) Thorne, 1978 |
| Scirpus cernuus var. californicus (Torr.) Beetle, 1944 |
| Scirpus chilensis Nees, 1843 |
| Scirpus chirigota C. Wright, 1871 |
| Scirpus coahuilensis Svenson, 1944 |
| Scirpus coloradoensis Britton, 1904 |
| Scirpus complanatus Retz., 1789 |
| Scirpus corymbosus L., 1756 |