| Muhlenbergia composita Trin. ex Kunth, 1833 |
| Muhlenbergia confusa (E. Fourn.) Swallen, 1947 |
| Muhlenbergia crispiseta Hitchc., 1935 |
| Muhlenbergia cristaliae Vigosa, 2019 |
| Muhlenbergia cualensis Y. Herrera & P.M. Peterson, 1992 |
| Muhlenbergia curvula Swallen, 1950 |
| Muhlenbergia debilis (Kunth) Trin., 1824 |
| Muhlenbergia decumbens Swallen, 1958 |
| Muhlenbergia densiflora Scribn. & Merr., 1901 |
| Muhlenbergia depauperata Scribn., 1884 |
| Muhlenbergia diehlii M.E. Jones, 1912 |
| Muhlenbergia diffusa Willd., 1797 |
| Muhlenbergia distans Swallen, 1935 |
| Muhlenbergia distichophylla (J. Presl) Kunth, 1833 |
| Muhlenbergia distichophylla B.D. Jacks., 1894 |
| Muhlenbergia diversiglumis Trin., 1841 |
| Muhlenbergia dubia E. Fourn., 1885 |
| Muhlenbergia dubioides C.O. Goodd., 1940 |
| Muhlenbergia dumosa Scribn. ex Vasey, 1892 |
| Muhlenbergia dumosa var. minor Scribn. ex Beal, 1896 |