| Glyceria striata f. stricta (Scribn.) B. Boivin, 1967 |
| Glyceria striata subsp. stricta (Scribn.) Hultén, 1942 |
| Glyceria striata var. mexicana Kelso, 1935 |
| Glyceria striata var. striata (Lam.) Hitchc., 1928 |
| Glyceria striata var. stricta (Scribn.) Fernald, 1929 |
| Glyceria stricta Buckley, 1862 |
| Gnomonia Lunell, 1915 |
| Gnomonia octoflora (Walter) Lunell, 1915 |
| Goldbachia Trin., 1821 |
| Goldbachia mikanii Trin. ex Spreng., 1820 |
| Gossweilerochloa Renvoize, 1979 |
| Gouinia E. Fourn. ex Benth. & Hook. f., 1883 |
| Gouinia brandegei (Vasey) Hitchc., 1903 |
| Gouinia guatemalensis (Hack.) Swallen, 1934 |
| Gouinia isabelensis J.J. Ortíz, 1993 |
| Gouinia latifolia (Griseb.) Vasey, 1895 |
| Gouinia latifolia var. guatemalensis (Hack.) J.J. Ortíz, 1993 |
| Gouinia longiramea Swallen, 1934 |
| Gouinia mexicana (Scribn.) Vasey, 1895 |
| Gouinia papillosa Swallen, 1934 |