| Leersia mexicana Kunth, 1815 |
| Leersia monandra Sw., 1788 |
| Leersia oryzoides (L.) Sw., 1788 |
| Leersia oryzoides f. clandestina Eames, 1916 |
| Leersia parviflora Desv., 1831 |
| Leiopoa Ohwi, 1932 |
| Leleba Nakai, 1933 |
| Leleba multiplex (Lour.) Nakai, 1933 |
| Leleba oldhamii (Munro) Nakai, 1933 |
| Leleba tuldoides (Munro) Nakai, 1933 |
| Leleba vulgaris (Schrad. ex J.C. Wendl.) Nakai, 1933 |
| Lenormandia Steud., 1850 |
| Lepeocercis Trin., 1820 |
| Lepeocercis annulata (Forssk.) Nees, 1841 |
| Lepeocercis mollicoma (Kunth) Nees, 1835 |
| Lepeocercis pertusa (L.) Hassk., 1848 |
| Lepeocercis serrata (Retz.) Trin., 1820 |
| Lepideilema Trin., 1830 |
| Lepideilema lancifolium Trin., 1830 |
| Lepidurus Janch., 1944 |