Gabertia, Genus – synonym of Grammatophyllum, Genus
Galera, Genus – synonym of Epipogium, Genus
Gamoplexis, Genus – synonym of Gastrodia, Genus
Garayanthus, Genus – synonym of Cleisostoma, Genus
Gastroglottis, Section (Malaxideae)
Gastroglottis, Genus – synonym of Malaxis, Genus
Gastrosiphon, Genus – synonym of Corybas, Genus
Geissanthera, Section (Aeridinae)
Geissanthera, Genus – synonym of Microtatorchis, Genus
Genus Amblyanthus – synonym of Amblyanthus, Section (Dendrobium)
Genus Arachnanthe – synonym of Arachnis, Genus
Genus Camarotis – synonym of Micropera, Genus
Genus Collabiopsis – synonym of Collabium, Genus
Genus Conchoglossum – synonym of Cyrtosia, Genus
Genus Conostalix – synonym of Conostalix, Section (Dendrobium)
Genus Coralliokyphos – synonym of Moerenhoutia, Genus
Genus Cryptorchis – synonym of Taeniophyllum, Genus
Genus Cystopus – synonym of Pristiglottis, Genus
Genus Dicerostylis – synonym of Hylophila, Genus
Genus Diploconchium – synonym of Agrostophyllum, Genus
Genus Donacopsis – synonym of Arundina, Genus
Genus Dryorkis – synonym of Disperis, Genus
Genus Fieldia – synonym of Vandopsis, Genus
Genus Geissanthera – synonym of Microtatorchis, Genus
Genus Herpetophytum – synonym of Herpetophytum, Section (Dendrobium)
Genus Hyalosema – synonym of Hyalosema, Section (Bulbophyllum)
Genus Lectandra – synonym of Poaephyllum, Genus
Genus Leucorchis – synonym of Didymoplexis, Genus
Genus Mariarisqueta – synonym of Cheirostylis, Genus
Genus Microphytanthe – synonym of Microphytanthe, Section (Dendrobium)
Genus Mitopetalum – synonym of Tainia, Genus
Genus Monosepalum – synonym of Monosepalum, Section (Bulbophyllum)
Genus Neoclemensia – synonym of Gastrodia, Genus
Genus Nephranthera – synonym of Renanthera, Genus
Genus Niemeyera – synonym of Apostasia, Genus
Genus Odontochilus – synonym of Anoectochilus, Genus
Genus Orxera – synonym of Aerides, Genus
Genus Otandra – synonym of Geodorum, Genus
Genus Oxystophyllum – synonym of Oxystophyllum, Section (Dendrobium)
Genus Pachychilus – synonym of Pachystoma, Genus
Genus Pachyrhizanthe – synonym of Cymbidium, Genus
Genus Pantlingia – synonym of Stigmatodactylus, Genus
Genus Papulipetalum – synonym of Papulipetalum, Section (Bulbophyllum)
Genus Pattonia – synonym of Grammatophyllum, Genus
Genus Pedilochilus – synonym of Pedilochilus, Section (Bulbophyllum)
Genus Pelma – synonym of Pelma, Section (Bulbophyllum)
Genus Physurus – synonym of Erythrodes, Genus
Genus Platyclinis – synonym of Dendrochilum, Genus
Genus Platysma – synonym of Podochilus, Genus
Genus Plexaure – synonym of Phreatia, Genus
Genus Podanthera – synonym of Epipogium, Genus
Genus Podochilopsis – synonym of Adenoncos, Genus
Genus Pogochilus – synonym of Galeola, Genus
Genus Pseudomacodes – synonym of Macodes, Genus
Genus Ptilocnema – synonym of Pholidota, Genus
Genus Ptychogyne – synonym of Coelogyne, Genus
Genus Rhamphidia – synonym of Hetaeria, Genus
Genus Rhynchanthera – synonym of Corymborkis, Genus
Genus Rhynchophreatia – synonym of Thelasis, Genus
Genus Sarcanthus – synonym of Cleisostoma, Genus
Genus Schismoceras – synonym of Aporum, Section (Dendrobium)
Genus Scoliochilus – synonym of Appendicula, Genus
Genus Singularybas – synonym of Corybas, Genus
Genus Stellorkis – synonym of Nervilia, Genus
Genus Stimegas – synonym of Paphiopedilum, Genus
Genus Synadena – synonym of Phalaenopsis, Genus
Genus Synptera – synonym of Trichoglottis, Genus
Genus Tapeinoglossum – synonym of Tapeinoglossum, Section (Bulbophyllum)
Genus Thylacis – synonym of Thrixspermum, Genus
Genus Titania – synonym of Oberonia, Genus
Genus Trachoma – synonym of Tuberolabium, Genus
Genus Trichorhiza – synonym of Luisia, Genus
Genus Trichosia – synonym of Trichotosia, Genus
Genus Trigonanthus – synonym of Ceratostylis, Genus
Genus Triorchis – synonym of Spiranthes, Genus
Genus Trudelia – synonym of Vanda, Genus
Genus Tubilabium – synonym of Myrmechis, Genus
Genus Tulotis – synonym of Platanthera, Genus
Genus Urochilus – synonym of Pterostylis, Genus
Genus Vanillophorum – synonym of Vanilla, Genus
Genus Vieillardorchis – synonym of Goodyera, Genus
Genus Vonroemeria – synonym of Octarrhena, Genus
Genus Wailesia – synonym of Dipodium, Genus
Genus Zoduba – synonym of Calanthe, Genus
Genus Zosterostylis – synonym of Cryptostylis, Genus
Genychilus, Section (Malaxideae)
Genychilus?, Section (Malaxideae)
Genyglossum, Section (Malaxideae)
Geobina, Genus – synonym of Goodyera, Genus
Geocymbidium, Section (Cymbidium)
Georchis, Genus – synonym of Goodyera, Genus
Gersinia, Genus – synonym of Bulbophyllum, Genus
Ghiesbreghtia, Genus – synonym of Calanthe, Genus
Gibberanthera, Section – synonym of Brachypus, Section (Bulbophyllum)
Giulianettia, Genus – synonym of Glomera, Genus
Globiceps, Section – synonym of Brachystachyae, Section (Bulbophyllum)
Glossaspis, Genus – synonym of Habenaria, Genus
Glossochilopsis, Genus – synonym of Malaxis, Genus
Glossorhyncha, Genus – synonym of Glomera, Genus
Gongorodes, Section (Bulbophyllum)
Govindooia, Genus – synonym of Tropidia, Genus
Grafia, Genus – synonym of Phalaenopsis, Genus
Grastidium, Section (Dendrobium)
Gunnia, Genus – synonym of Sarcochilus, Genus
Gymnadeniopsis, Genus – synonym of Platanthera, Genus
Gyrostachys, Genus – synonym of Spiranthes, Genus