| Orchidaceae | |
Eloyella | P. Ortiz | Orquideología 13(3): 234–235 | 1979 |
| Orchidaceae | ! |
Eloyella panamensis | (Dressler) Dodson | Icon. Pl. Trop., ser. 2. 5: pl. 455 | 1989 |
| Orchidaceae | |
Oakes-amesia | C. Schweinf. & P.H. Allen | Bot. Mus. Leafl. 13(6): 133, t. 10 | 1948 |
| Orchidaceae | |
Oakes-amesia cryptantha | C. Schweinf. & P.H. Allen | Bot. Mus. Leafl. 13(6): 134, t. 10 | 1948 |
| Orchidaceae | |
Ornithocephalus | Hook. | Exot. Fl. 2: t. 127 | 1824 |
| Orchidaceae | |
Ornithocephalus aristatus | Pupulin & Dressler | Brittonia 58(4): 314–316, f. 1A–E | 2006 |
| Orchidaceae | |
Ornithocephalus bicornis | Lindl. ex Benth. | Bot. Voy. Sulphur 172 | 1844 [1846] |
| Orchidaceae | |
Ornithocephalus castelfrancoi | Pupulin | Lindleyana 15(1): 27, f. 4 | 2000 |
| Orchidaceae | |
Ornithocephalus cochleariformis | C. Schweinf. | Bot. Mus. Leafl. 4(7): 124 | 1937 |
| Orchidaceae | |
Ornithocephalus cryptanthus | (C. Schweinf. & P.H. Allen) Toscano & Dressler | Lindleyana 15(4): 255 | 2000 |
| Orchidaceae | |
Ornithocephalus dressleri | (Toscano) Toscano & Dressler | Lindleyana 15(4): 255 | 2000 |
| Orchidaceae | |
Ornithocephalus grex-anserinus | Dressler & Mora-Ret. | Novon 7(2): 120–121, f. 2 | 1997 |
| Orchidaceae | |
Ornithocephalus inflexus | Lindl. | Ann. Nat. Hist. 4(26): 384 | 1840 |
| Orchidaceae | |
Ornithocephalus iridifolius | Rchb. f. | Ann. Bot. Syst. 6: 494 | 1863 |
| Orchidaceae | |
Ornithocephalus lankesteri | Ames | Sched. Orch. 3: 24–25 | 1923 |
| Orchidaceae | |
Ornithocephalus montealegreae | Pupulin | Orchids (West Palm Beach) 71(11): 1017–1019, f., photos | 2002 |
| Orchidaceae | |
Ornithocephalus numenius | Toscano & Dressler | Lindleyana 15(4): 252–255, f. 1 | 2000 |
| Orchidaceae | |
Ornithocephalus obergiae | Soto Arenas | Orquídea (Mexico City), n.s. 12(2): 194–196, f. 1–2 | 1992 |
| Orchidaceae | |
Ornithocephalus powellii | Schltr. | Repert. Spec. Nov. Regni Veg. Beih. 17: 88–89 | 1922 |
| Orchidaceae | |
Ornithocephalus tonduzii | Schltr. | Beih. Bot. Centralbl., Abt. 2 36(2): 420 | 1918 |
| Orchidaceae | |
Ornithocephalus valerioi | Ames & C. Schweinf. | Sched. Orch. 10: 103–105 | 1930 |
| Orchidaceae | |
Sphyrastylis cryptantha | (C. Schweinf. & P.H. Allen) Garay | Bot. Mus. Leafl. 21(9): 264 | 1967 |
| Orchidaceae | |
Sphyrastylis dressleri | Toscano | Lindleyana 14(1): 24, f. 1 | 1999 |