| Panicum gouinii E. Fourn., 1886 |
| Panicum gouinii var. pumilum E. Fourn., 1886 |
| Panicum grande Hitchc. & Chase, 1915 |
| Panicum grandiflorum Trin. ex Nees, 1829 |
| Panicum gravius Hitchc. & Chase, 1906 |
| Panicum grisebachianum Mez, 1921 |
| Panicum grisebachii Nash, 1908 |
| Panicum grossarium L., 1759 |
| Panicum grossum Salisb., 1796 |
| Panicum guadaloupense Spreng. ex Steud., 1853 |
| Panicum guaraniticum Speg., 1883 |
| Panicum guatemalense Swallen, 1933 |
| Panicum guayaquilense Steud., 1854 |
| Panicum guianense Hitchc., 1922 |
| Panicum haemacarpon Ashe, 1898 |
| Panicum haenkeanum J. Presl, 1830 |
| Panicum hallii Vasey, 1884 |
| Panicum hallii subsp. filipes (Scribn.) Freckmann & Lelong, 2002 |
| Panicum hallii var. filipes (Scribn.) F.R. Waller, 1974 |
| Panicum hallii var. hallii Vasey, 1884 |