| Mnesithea granularis (L.) de Koning & Sosef, 1986 |
| Mnesithea ramosa (E. Fourn.) de Koning & Sosef, 1986 |
| Mnesithea rugosa (Nutt.) de Koning & Sosef, 1986 |
| Mnesithea subgibbosa (C. Winkl. ex Hack.) de Koning & Sosef, 1986 |
| Moenchia Wender. ex Steud., 1841 |
| Moenchia speciosa Wender. ex Steud., 1841 |
| Molinia Schrank, 1789 |
| Molinia retusa Griseb. ex E. Fourn., 1886 |
| Molinieae Jirásek, 1966 |
| Monachne P. Beauv., 1812 |
| Monachne punctata (L.) Nash, 1903 |
| Monachne subglabra Nash, 1903 |
| Monachne unilateralis Roem. & Schult., 1817 |
| Monachne urvilleana (Kunth) Herter, 1953 |
| Monachyron Parl. ex Hook., 1849 |
| Monachyron roseum (Nees) Parl., 1850 |
| Monachyron tonsum (Nees) Parl., 1850 |
| Monandraira É. Desv., 1854 |
| Monanthochloe Engelm., 1859 |
| Monanthochloe littoralis Engelm., 1859 |