| Panicum hirticaule var. minus Andersson, 1855 |
| Panicum hirticaule var. pampinosum (Hitchc. & Chase) Beetle, 1981 |
| Panicum hirticaule var. stramineum (Hitchc. & Chase) Beetle, 1981 |
| Panicum hirticaule var. verrucosum Zuloaga & Morrone, 1996 |
| Panicum hirticaulum Desv., 1831 |
| Panicum hirtivaginum Hitchc., 1909 |
| Panicum hirtum Lam., 1798 |
| Panicum hispidifolium Swallen, 1950 |
| Panicum holciforme (Kunth) Steud., 1854 |
| Panicum holochrysum Trin., 1834 |
| Panicum hololeucum Mez, 1917 |
| Panicum hondurense Swallen, 1948 |
| Panicum horizontale (Willd.) G. Mey., 1818 |
| Panicum huachucae Ashe, 1898 |
| Panicum huachucae var. fasciculatum (Torr.) F.T. Hubb., 1912 |
| Panicum huachucae var. silvicola Hitchc. & Chase, 1908 |
| Panicum humboldtianum (Flüggé) Kuntze, 1898 |
| Panicum hydrophilum Schult., 1824 |
| Panicum hygrophilum Salzm. ex Steud., 1853 |
| Panicum hylaeicum Mez, 1917 |