| Muhlenbergia michisensis Y. Herrera & P.M. Peterson, 1992 |
| Muhlenbergia microsperma (DC.) Kunth, 1829 |
| Muhlenbergia microsperma (DC.) Trin., 1824 |
| Muhlenbergia minutiflora (Michx.) Hitchc., 1896 |
| Muhlenbergia minutissima (Steud.) Swallen, 1947 |
| Muhlenbergia montana (Nutt.) Hitchc., 1920 |
| Muhlenbergia monticola Buckley, 1862 |
| Muhlenbergia mucronata (Kunth) Trin., 1824 |
| Muhlenbergia mundula I.M. Johnst., 1943 |
| Muhlenbergia mutica (Rupr. ex E. Fourn.) Hitchc., 1935 |
| Muhlenbergia nana Benth., 1846 |
| Muhlenbergia nardifolia Griseb., 1879 |
| Muhlenbergia nebulosa Scribn. ex Beal, 1896 |
| Muhlenbergia neomexicana Vasey, 1886 |
| Muhlenbergia nigra Hitchc., 1937 |
| Muhlenbergia orophila Swallen, 1950 |
| Muhlenbergia palmeri Vasey, 1886 |
| Muhlenbergia palustris Scribn., 1898 |
| Muhlenbergia paniculata (Nutt.) Columbus, 2010 |
| Muhlenbergia parviglumis Vasey, 1892 |