| Gentianopsis detonsa var. lanceolata (Benth.) Villarreal & A.E. Estrada, 2011 |
| Gentianopsis detonsa var. superba (Greene) Villarreal & A.E. Estrada, 2011 |
| Gentianopsis lanceolata (Benth.) Iltis, 1965 |
| Gentianopsis macrantha (D. Don ex G. Don) Iltis, 1965 |
| Gyrandra Griseb., 1845 |
| Gyrandra brachycalyx (Standl. & L.O. Williams) G. Mans., 2004 |
| Gyrandra chironioides Griseb., 1845 |
| Gyrandra pauciflora (M. Martens & Galeotti) G. Mans., 2004 |
| Gyrandra pterocaulis (C.R. Broome) G. Mans., 2004 |
| Gyrandra tenuifolia (M. Martens & Galeotti) G. Mans., 2004 |
| Halenia Borkh., 1796 |
| Halenia alata (M. Martens & Galeotti) Hemsl., 1882 |
| Halenia alleniana Standl. ex Wilbur, 1984 |
| Halenia brevicornis (Kunth) G. Don, 1837 |
| Halenia brevicornis var. latifolia (Schltdl. & Cham.) C.K. Allen, 1933 |
| Halenia brevicornis var. micranthella (Briq.) C.K. Allen, 1933 |
| Halenia brevicornis var. tuerckheimii (Briq.) C.K. Allen, 1933 |
| Halenia conzattii Greenm., 1912 |
| Halenia crassiuscula B.L. Rob. & Seaton, 1893 |
| Halenia crumiana Wilbur, 1984 |