| Glyceria mexicana (Kelso) Beetle, 1981 |
| Glyceria michauxii Kunth, 1829 |
| Glyceria micrantha Steud., 1854 |
| Glyceria neogaea Steud., 1854 |
| Glyceria nervata (Willd.) Trin., 1830 |
| Glyceria nervata var. rigida (Nash) Lunell, 1915 |
| Glyceria rigida (L.) Sm., 1824 |
| Glyceria septentrionalis Hitchc., 1906 |
| Glyceria striata (Lam.) Hitchc., 1928 |
| 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 |