| Panicum subpetiolatum Steud., 1853 |
| Panicum subquadriparum Trin., 1826 |
| Panicum subsimplex Ashe, 1900 |
| Panicum subsphaerocarpum Salzm. ex Schltdl., 1862 |
| Panicum subspicatum Vasey, 1889 |
| Panicum subuniflorum Bosc ex Spreng., 1825 |
| Panicum subvillosum Ashe, 1900 |
| Panicum sucosum Hitchc. & Chase, 1915 |
| Panicum sulcatum Aubl., 1775 |
| Panicum swartzianum Hitchc., 1908 |
| Panicum tamaulipense F.R. Waller & Morden, 1983 |
| Panicum taxodiorum Ashe, 1900 |
| Panicum tectum Willd. ex Spreng., 1825 |
| Panicum tejucense Nees, 1829 |
| Panicum tenax Rich., 1792 |
| Panicum tenerum Beyr. ex Trin., 1834 |
| Panicum tennesseense Ashe, 1898 |
| Panicum tenuiculmum G. Mey., 1818 |
| Panicum tenuiflorum Schrank, 1824 |
| Panicum tenuissimum Mart. ex Schrank, 1822 |