Vuylstekeara, × Wilsonara Subtribe Pachyphyllinae: less than 50 species. Genus: PachyphyllumSubtribe Thecostelinae: less than 50 species. Genus: ThecosteleTribe Vandeae Over 1,700 species in more than 130 genera; occurs in tropical Asia, Pacific Islands, tropical America, Australia, and Africa. Subtribe Aerangidinae: about 300 species in 36 genera; tropical Africa and Madagascar. Genera: Aerangis, Ancistrorhynchus, Angraecopsis, Beclardia, Bolusiella, Chamaeangis, Cribbia, Cyrtorchis, Diaphananthe, Eurychone, Listrostachys, Microcoelia, Microterangis, Mystacidium, Podangis, Rangaeris, Rhipidoglossum, Solenangis, Sphyrarhynchus, Tridactyle, YpsilopusSubtribe Aeridinae (formerly Sarcanthinae): more than 1,000 species in 103 genera, including about 200 hybrid species; occurs mostly in Asia with a few in Africa. Alliance Phalaenopsis Genera: Aerides, Chiloschista, Doritis, Phalaenopsis, Paraphalaenopsis, Rhynchostylis, SarcochilusAlliance Vanda Genera: Adenoncos, Arachnis, Ascocentrum, Ascoglossum, Euanthe, Luisia, Renanthera, Vanda, VandopsisAlliance Trichoglottis Genera: Abdominea, Acampe, Amesiella, Cleisostoma, Gastrochilus, Neofinetia, Robiquetia, TrichoglottisHybrids Genera: × Aeridovanda, × Aranda, × Ascocenda, × Ascofinetia, × Asconopsis, × Christieara, × Doritaenopsis, × Opsistylis, × Perreiraara, × Renanstylis, × Renantanda, × Renanthopsis, × Rhynchovanda, × Vandaenopsis, × Vascostylis Subtribe Angraecinae: about 400 species in 19 genera, tropical Africa and Madagascar. Alliance Angraecum Genera: Aeranthes, Angraecum, Bonniera, Calyptrochilum, Cryptopus, Jumellea, Lemurella, Lemurorchis, Neobathiea, Oeonia, Oeoniella, SobennikoffiaAlliance Campylocentrum Genera: Campylocentrum, DendrophylaxSubtribe Polystachyinae (formerly part of the Epidendreae): about 220 species in four genera. They all show four pollinia. The lip often has mealy hairs called pseudopollen on the upper surface. Genera: Hederorkis, Imerinaea, Neobenthamia, PolystachyaTribe Maxillarieae 70 to 80 genera with about 1,000 species; most grow in tropical America as terrestrials or epiphytes, a few are myco-heterotrophs. Most show pseudobulbs, but a few have reedlike stems or thick underground stems. Blooms have four pollinia. Subtribe Bifrenariinae: thin and pleated leaves. Genera: Bifrenaria, XylobiumSubtribe Corallorhizinae: all myco-heterotrophs Genera: Aplectrum, CorallorhizaSubtribe Dichaeinae Genus: DichaeaSubtribe Lycastinae: thin and pleated leaves. Genera: Anguloa, Bifrenaria, Lycaste, Neomoorea, Ciripedium Rudolfiella, Teuscheria, XylobiumSubtribe Maxillariinae: largest subtribe with nearly half of the tribe species. The leathery leaves are conduplicate, i.e. folded together lengthwise. Genera: Chrysocycnis, Cyrtidium, Maxillaria, Mormolyca, Pityphyllum, Scuticaria, Sepalosaccus, TrigonidiumSubtribe: Ornithocephalinae Genera: Ornithocephalus, ZygostatesSubtribe Stanhopeinae: about 200 species; epiphytes found in the Western Hemisphere. Genera: Acineta, Braemia, Cirrhaea, Coryanthes, Embreea, Gongora, Horichia, Houlletia, Jennyella, Kegeliella, Lacaena, Lueddemannia, Paphinia, Polycycnis, Schlimia, Sievekingia, Soterosanthus, Stanhopea, Trevoria, VasqueziellaSubtribe Coeliopsidinae Genera: Coeliopsis, Lycomormium, PeristeriaSubtribe Telipogoninae Genera: Dipterostele, Hofmeisterella, Stellilabium, Telipogon, TrichocerosSubtribe Zygopetilinae: about 150 species. Alliance Warrea Genera: Otostylis, WarreaAlliance Zygopetalum Genera: Aganisia, Batemannia, Bollea, Cheiradenia, Chondrorhyncha, Cochleanthes, Colax, Pabstia, Promenaea, ZygopetalumAlliance Bollea Genera: Bollea, Chondrorhyncha, Cochleanthes, Huntleya, Kefersteinia, Pescatoria, SteniaAlliance Vargasiella