| Muhlenbergia trifida Hack., 1910 |
| Muhlenbergia uniseta (Lag.) Columbus, 2010 |
| Muhlenbergia utilis (Torr.) Hitchc., 1933 |
| Muhlenbergia vaginata Swallen, 1950 |
| Muhlenbergia vaseyana Scribn., 1899 |
| Muhlenbergia versicolor Swallen, 1950 |
| Muhlenbergia villiflora Hitchc., 1935 |
| Muhlenbergia villiflora var. villiflora Hitchc., 1935 |
| Muhlenbergia virescens (Kunth) Kunth, 1829 |
| Muhlenbergia virescens (Kunth) Trin., 1824 |
| 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 |