| Panicum ternatum (Hochst. ex A. Rich.) Hochst. ex A. Rich., 1851 |
| Panicum texanum Buckley, 1866 |
| Panicum thermale Bol., 1862 |
| Panicum thurowii Scribn. & J.G. Sm., 1899 |
| Panicum tonsum (Nees) Steud., 1854 |
| Panicum trachyspermum Nees, 1829 |
| Panicum transiens Swallen, 1931 |
| Panicum tremulosum Mez, 1917 |
| Panicum tremulum Spreng., 1821 |
| Panicum trichanthum Nees, 1829 |
| Panicum trichanthum var. modestum Döll, 1877 |
| Panicum trichidiachne Döll, 1877 |
| Panicum trichoclados C. Rchb. ex Kunth, 1833 |
| Panicum trichocondylum Steud., 1853 |
| Panicum trichogonum Willd., 1841 |
| Panicum trichoides Sw., 1788 |
| Panicum trichophorum Schrad. ex Schult., 1824 |
| Panicum trigonum Retz., 1783 |
| Panicum triquetrum Willd. ex Döll, 1877 |
| Panicum truncatum Trin., 1826 |