| Orchidaceae | |
Hexisea amparoana
| (Schltr.) Ames, F.T. Hubb. & C. Schweinf. | Bot. Mus. Leafl. 3(3): 40 | 1934 |
| Orchidaceae | |
Hexisea arctata
| Dressler | Orquídea (Mexico City), n.s. 7(3): 223–224, f. | 1979 |
| Orchidaceae | |
Hexisea aurea
| (Rchb. f.) Dressler | Taxon 13: 246 | 1964 |
| Orchidaceae | |
Hexisea bicornis
| (Lindl.) Dressler | Phytologia 21(7): 442 | 1971 |
| Orchidaceae | |
Hexisea bidentata
| Lindl. | J. Bot. (Hooker) 1: 8 | 1834 |
| Orchidaceae | |
Hexisea colombiana
| Schltr. | Repert. Spec. Nov. Regni Veg. Beih. 27: 132 | 1924 |
| Orchidaceae | |
Hexisea cuniculata
| (Schltr.) Ames | Sched. Orch. 9: 48 | 1925 |
| Orchidaceae | ! |
Hexisea imbricata
| (Lindl.) Rchb. f. | Ann. Bot. Syst. 6: 470 | 1861 [1862] |
| Orchidaceae | |
Hexisea lankesteri
| Ames | Sched. Orch. 9: 47–48 | 1925 |
| Orchidaceae | |
Hexisea oppositifolia
| (A. Rich. & Galeotti) Rchb. f. | Ann. Bot. Syst. 6: 470 | 1861 [1862] |
| Orchidaceae | ! |
Hexisea reflexa
| Rchb. f. ex Griseb. | Fl. Brit. W. I. 623 | 1864 |
| Orchidaceae | * |
Hexisea reflexa
| Rchb. f. | Linnaea 41: 131–132 | 1877 |
| Orchidaceae | |
Hexisea sigmoidea
| Ames & C. Schweinf. | Sched. Orch. 8: 39–40 | 1925 |
| Orchidaceae | |
Hexisea tenuissima
| H. Wendl. & Kraenzl. | Xenia Orchid. t. 300 | 1900 |