| Muhlenbergia virescens subsp. quadridentata (Kunth) Y. Herrera, 1994 |
| Muhlenbergia virletii (E. Fourn.) Soderstr., 1967 |
| Muhlenbergia watsoniana Hitchc., 1935 |
| Muhlenbergia wolfii (Vasey) Rydb., 1905 |
| Muhlenbergia wrightii Vasey ex J.M. Coult., 1885 |
| Muhlenbergia wrightii var. annulata Vasey, 1885 |
| Muhlenbergia xanthodas Soderstr., 1967 |
| Muhlenbergia xerophila C.O. Goodd., 1940 |
| Muhlenbergiinae Pilg., 1956 |
| Munroa Torr., 1857 |
| Munroa pulchella (Kunth) Amarilla, 2013 |
| Munroa squarrosa (Nutt.) Torr., 1857 |
| Munroa squarrosa var. floccuosa Vasey ex Beal, 1896 |
| Munroinae Parodi, 1946 |
| Mygalurus Link, 1821 |
| Nabelekia Roshev., 1937 |
| Narduretia Villar, 1925 |
| Nardurus (Bluff, Nees & Schauer) Rchb., 1841 |
| Nardurus (Bluff, Nees & Schauer) Stace, 1978 |
| Narenga Bor, 1940 |