| Hagsatera R. González, 1974 |
| Hagsatera brachycolumna (L.O. Williams) R. González, 1974 |
| Hagsatera rosilloi R. González, 1974 |
| Hapalorchis Schltr., 1919 |
| Hapalorchis lineatus (Lindl.) Schltr., 1920 |
| Harrisella Fawc. & Rendle, 1909 |
| Harrisella amesiana Cogn., 1910 |
| Harrisella porrecta (Rchb. f.) Fawc. & Rendle, 1909 |
| Hartwegia Nees, 1831 |
| Hartwegia bergeriana Schltr., 1906 |
| Hartwegia gemma Rchb. f., 1878 |
| Hartwegia purpurea Lindl., 1837 |
| Hartwegia purpurea var. angustifolia Booth ex Lindl., 1843 |
| Helleborine Moench, 1794 |
| Helleborine gigantea (Douglas ex Hook.) Druce, 1909 |
| Helleriella A.D. Hawkes, 1966 |
| Helleriella guerrerensis Dressler & Hágsater, 1975 |
| Helleriella nicaraguensis A.D. Hawkes, 1966 |
| Heteranthocidium Szlach., Mytnik & Romowicz, 2006 |
| Heteranthocidium pollardii (Dodson & Hágsater) Szlach., Mytnik & Romowicz, 2006 |