| Muhlenbergia capillaris var. trichopodes (Elliott) Vasey, 1892 |
| Muhlenbergia capillipes (M.E. Jones) P.M. Peterson & Annable, 1991 |
| Muhlenbergia carinata Mez, 1921 |
| Muhlenbergia cenchroides (Humb. & Bonpl. ex Willd.) P.M. Peterson, 2009 |
| Muhlenbergia ciliata (Kunth) Kunth, 1829 |
| Muhlenbergia ciliata (Kunth) Trin., 1824 |
| Muhlenbergia clomena Kunth, 1829 |
| Muhlenbergia coloradensis Mez, 1921 |
| 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 |