| Scirpus lithospermus L., 1753 |
| Scirpus longifolius Hook. & Arn., 1841 |
| Scirpus longispicatus (Britton) Smyth, 1899 |
| Scirpus lorentzii Boeckeler, 1874 |
| Scirpus luzulae L., 1762 |
| Scirpus maculosus Vahl, 1806 |
| Scirpus malheurensis L.F. Hend., 1930 |
| Scirpus maritimus L., 1753 |
| Scirpus maritimus var. fluviatilis Torr., 1836 |
| Scirpus maritimus var. macrostachyos Michx., 1803 |
| Scirpus maritimus var. paludosus (A. Nelson) Kük., 1926 |
| Scirpus maritimus var. robustus (Pursh) Kük., 1926 |
| Scirpus melas Kunze ex Kunth, 1837 |
| Scirpus mexicanus C.B. Clarke ex Britton, 1892 |
| Scirpus michauxii Pers., 1805 |
| Scirpus micranthus Vahl, 1805 |
| Scirpus micranthus var. humboldtii (Roem. & Schult.) Boeckeler, 1870 |
| Scirpus microcarpus (Torr.) Kuntze, 1891 |
| Scirpus microcarpus J. Presl & C. Presl, 1828 |
| Scirpus minimus Pursh, 1814 |