VASCULAR PLANT FAMILIES and GENERA

List of Genera in ORCHIDACEAE

A = Apostasioideae, C = Cypripedioideae, Eare = Epidendroideae-Arethuseae, Ecoll = Epidendroideae-Collabieae, Ecym = Epidendroideae-Cymbidieae, Eepi = Epidendroideae-Epidendreae, Egas = Epidendroideae-Gastrodieae, Emal = Epidendroideae-Malaxideae, Eneo = Epidendroideae-Neottieae, Ener = Epidendroideae-Nervilieae, Epod = Epidendroideae-Podochileae, Esob = Epidendroideae-Sobralieae, Etha = Epidendroideae-Thaieae, Etri = Epidendroideae-Triphoreae, Etro = Epidendroideae-Tropideae, Evan = Epidendroideae-Vandeae, Ewul = Epidendroideae-Wullschlaegelieae, Exer = Epidendroideae-Xerorochideae, Ocon = Orchidoideae-Codonorchideae; Ocra = Orchidoideae-Cranichideae, Odiu = Orchidoideae-Diuridae, Oorc = Orchidoideae-Orchideae, Vpog = Vanilloideae-Pogonieae, Vvan = Vanilloideae-Vanilleae.

Note: the thousands of names of intergeneric hybrids are not included.

Aa Reichenbach f. - Ocra
Abaxianthus M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Aberrantia Luer = Acianthera Schiedw. - Eepi
Abola Lindley = Caucaea Schlechter - Ecym
Aborchis Necker = Orchis L. - Oorc
Acacallis Lindley = Aganisia Lindley - Ecym
Abola Lindley = Caucaea Schlechter - Ecym
Abdominea J. J. Smith = Robiquetia Gaudichaud - Evan
Acacallis Lindley = Aganisia Lindley - Ecym
Acampe Lindley - Evan
Acanthephippium Blume - Ecoll
Acanthoglossum Blume = Pholidota Lindley - Eare
Acanthophippium Blume = Acanthephippium Blume - Ecoll
Aceras R. Brown = Orchis L. - Oorc
Aceratorchis Schlechter = Galearis Rafinesque - Oorc
Achlydosa M. A. Clements & D. L. Jones - Ocra
Achroanthes Rafinesque = Malaxis Swartz - Emal
Acianthera Schiedw. - Eepi
Acianthus R. Brown - Odiu
Acineta Lindley - Ecym
Acinopetala Luer ?= Masdevallia Ruiz & Pavon - Eepi
Ackermania Dodson & R. Escobar = Benzingia Dodson - Ecym
Aclinia Griffith = Dendrobium Swartz - Emal
Acoideum Lindley = Trichocentrum Poeppig & Endlicher - Ecym
Acoridium Nees & Meyen = Dendrochilum Blume - Eare
Acostaea Schlechter = Specklinia Lindley - Eepi
Acriopsis Blume - Ecym
Acroanthes Rafinesque = Achroanthes Rafinesque = Malaxis Swartz - Emal
Acrochaene Lindley = Bulbophyllum Thouars - Emal
Acrolophia Pfitzer - Ecym
Acronia C. Presl = Pleurothallis R. Brown - Eepi
Acropera Lindley = Gongora Ruiz & Pavon - Ecym
Acrorchis Dressler - Eepi
Adactylus (Endlicher) Rolfe = Apostasia Blume - A
Ada Lindley = Brassia R. Brown - Ecym
Adamanthus Szlachetko = Camaridium Lindley = Maxillaria Ruiz & Pavon s.l. - Ecym
Adamantinia van den Berg & C. N. Gonçalves - Eepi
Adelopetalum Fitzgerald = Bulbophyllum Thouars - Emal
Adenochilus J. D. Hooker - Odiu
Adenoncos Blume - Evan
Adenostylis Blume = Zeuxine Lindley - Ocra
Adipe Rafinesque = Bifrenaria Lindley - Ecym
Adnula Rafinesque = Pelexia Lindley - Ocra
Adrorhizon J. D. Hoooker - Evan
Aenhenrya Gopalan - Ocra
Aerangis Reichenbach f. - Evan
Aeranthes Lindley - Evan
Aerides Loureiro - Evan
Aeridium Salisbury = Aerides Loureiro - Evan
Aeridostachya (J. D. Hooker) Brieger = Callostylis Blume - Epod
Aerobium Sprengel = Angraecum Bory - Evan
Aetheorhyncha Dressler - Ecym
Aetheria Endlicher = Hetaeria Blume - Ocra
Aganisia Lindley - Ecym
Aglossorhyncha Schlechter - Eare
Agrostophyllum Blume - Eepi
Ala Szlachetko = Habenaria Willdenow - Oorc
Alamania Llave & Lexarza - Eepi
Alaticaulia Luer ?= Masdevallia Ruiz & Pavon - Eepi
Alatiglossum D. H. Baptista = Gomesa R. Brown - Ecym
Alatiliparis Marg. & Szlachetko - Emal
Alipsa Hoffmansegg = Liparis Richard - Emal
Alismorchis Thouars = Alismorkis Thouars = Calanthe R. Brown - Ecoll
Altensteinia Kunth - Ocra
Alvisia Lindley = Bryobium Lindley - Epod
Alwisia Lindley = Taeniophyllum Blume - Evan
Amalia Reichenbach f. = Laelia Lindley - Eepi
Amalias Hoffmannsegg = Laelia Lindley - Eepi
Amblostoma Scheidw. = Epidendrum L. - Eepi
Amblyanthe Rauschert = Dendrobium Swartz - Emal
Amblyanthus (Schlechter) Brieger = Dendrobium Swartz - Emal
Amblyoglottis Blume = Calanthe R. Brown - Ecoll
Amblystoma Kuntze = Epidendrum L. - Eepi
Ambrella H. Perrier - Evan
Amerorchis Hultén = Galearis Rafinesque - Oorc
Amesia A. Nelson & J. F. Macrbide = Epipactis Zinn - Eneo
Amesiella Garay - Evan
Amitostigma Schlechter = Ponerorchis Reichenbach f. - Oorc
Amparoa Schlechter = Rhynchostele Reichenbach f. - Ecym
Amphigena Rolfe = Disa P. J. Bergius - Oorc
Amphiglottium (Salisbury) Stein = Amphiglottis Salisbury = Epidendrum L. - Eepi
Amphorchis Thouars = Amphorkis Thouars = Cynorkis Thouars - Oorc
Ampliglossum Carpacci = Gomesa R. Brown - Ecym
Anacamptis Richard - Oorc
Anacheilum Hoffmannsegg = Prosthechea Knowles & Westcott - Eepi
Anaphora Gagnepain = Crepidium Blume - Emal
Anathallis Barbosa Rodrigues - Eepi
Ancipitia (Luer) Luer = Pleurothallis R. Brown - Eepi
Ancistrochilus Rolfe - Ecoll
Ancistrorhynchus Finet - Evan
Acostaea Schlechter = Specklinia Lidley - Eepi
Andinia (Luer) Luer - Eepi
Andreettaea Luer - Eepi
Adinorchis Szlachetko et al. = Chaubardia Reichenbach f. - Ecym
Androchilus Hartm. = Ponthieva R. Brown - Ocra
Androcorys Schlechter = Herminium L.- Oorc
Androgyne Griffith = Panisea Lindley - Eare
Anettea Szlachetko & Mytnik = Gomesa R. Brown - Ecym
Angorkis Thoaurs = Angorchis Thouars = Angraecum Bory - Evan
Angraecopsis Kränzl. - Evan
Angraecum Bory - Evan
Anguloa Ruiz & Pavon - Ecym
Ania Lindley - Ecoll
Anisopetala (Kränzl.) M. A. Clements = Dendrobium Swartz - Emal
Anisopetalon Hooker = Bulbophyllum Thouars - Emal
Anistylis Rafinesque = Liparis Richard - Emal
Ankylocheilos Summerhayes = Taeniophyllum Blume - Evan
Anneliesia Brieger & Lückel = Miltonia Lindley - Ecym
Anochilus Rolfe = Pterygodium Swartz - Oorc
Anoectochilus Blume - Ocra
Aopla Lindley = Herminium L. - Oorc
Anota Schlechter = Rhynchostylis Blume - Evan
Ansellia Lindley - Ecym
Anthereon Pridgeon & M. W. Chase = Pabstiella Brieger & Senghas - Eepi
Anthogonium Lindley - Eare
Anthogyas Rafinesque = Bletia Ruiz & Pavon - Eepi
Anthosiphon Schlechter = Cryptocentrum Bentham = Maxillaria Ruiz & Pavon s.l. - Ecym
Antichirostylis Kuntze = Anticheirostylis Fitzgerald = Genoplesium R. Brown - Odiu
Antilla Luer = Acianthera Schiedw. - Eepi
Antillanorchis (Grisebach) Garay = Tolumnia Rafinesque - Ecym
Aorchis Vermuelen = Galearis Rafinesque - Oorc
Apatostelis Garay = Stelis Swartz - Eepi
Apaturia Lindley = Pachystoma Blume - Ecoll
Aphyllorchis Blume - Eneo
Apista Blume = Podochilus Blume - Epod
Aplectrum Nuttall - Eepi
Apoda-prorepentia Luer = Acianthera Schiedw. - Eepi
Aporopsis M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Aporostylis Rupp & Hatch - Odiu
Aporum (Blume) Blume = Dendrobium Swartz - Emal
Apostasia Blume - A
Appendicula Blume - Epod
Appendiculopsis (Schlechter) Szlachetko = Agrostophyllum Blume - Eepi
Aracamunia Carnevali & Ramírez - Ocra
Arachnanthe Blume = Arachnis Blume - Evan
Arachnis Blume - Evan
Archineottia S. S. Chen = Neottia Guettard - Eneo
Archivea Christenson & Jenny - Ecym
Areldia Luer = Specklinia Lindley - Eepi
Arethusa L. - Eare
Arethusantha Finet = Cymbidium Swartz - Ecym
Argyrorchis Blume = Macodes (Blume) Lindley - Ocra
Arietinum Beck = Cypripedium L. - C
Arisanorchis Hayata = Cheirostylis Blume - Ocra
Aristotelea Loureiro = Spiranthes Richard - Ocra
Armodorum Breda = Arachnis Blume - Evan
Arnottia A. Richard = Cynorkis Thouars - Oorc
Arpophyllum Llave & Lexarza - Eepi
Arrhynchium Lindley = Arachnis Blume - Evan
Arthrochilus G. Beck = Epipactis Zinn - Eneo
Arthrochilus F. Mueller - Odiu
Arthrosia = Acianthera Schiedw. - Eepi
Artorima Dressler & G. E. Pollard - Eepi
Arundina Blume - Eare
Asarca Lindley = Chloraea Lindley - Ocra
Ascidieria Schlechter - Epod
Ascocentropsis Senghas & Schildh. = Vanda R. Brown - Evan
Ascocentrum Schlechter = Vanda R. Brown - Evan
Ascochilopsis Carr = Grosourdya Reichenbach f. - Evan
Ascochilus Ridley = Grosourdya Reichenbach f. - Evan
Ascoglossum Schlechter = Renanthera Loureiro - Evan
Ascolabium S. S. Ying = Holcoglossum Schlechter - Evan
Ascotainia Ridley = Tainia Blume - Ecoll
Aspasia Salisbury - Ecym
Aspidogyne Garay - Ocra
Aspegrenia Poeppig & Endlicher = Octomeria D. Don - Eepi
Atopoglossum Luer - Eepi
Auliza Salisbury = Epidendrum L. - Eepi
Auliza Small = Epidendrum L. - Eepi
Aulosepalum Garay - Ocra
Aulostylis Schlechter = Calanthe R. Brown - Ecoll
Aurinocidium Romowicz & Szlachetko = Grandiphyllum Docha Neto - Ecym
Australorchis Brieger = Dendrobium Swartz - Emal
Auxopus Schlechter - Egas
Aviceps Lindley = Satyrium L. - Oorc
Azadehdelia Braem = Cribbia Senghas - Evan

Baptistonia Barbosa Rodrigues = Gomesa R. Brown - Ecym
Barbosella Schlechter - Eepi
Barbrodia Luer = Barbosella Schlechter - Eepi
Barkeria Knowles & Westc. - Eepi
Barlia Partlatore = ?, Oorc
Barombia Schlechter = Aerangis Reichenbach f. - Evan
Barombiella Szlachetko = Rangaeris (Schlechter) Summerhayes - Evan
Bartholina R. Brown - Oorc
Basigyne J. J. Smith = Dendrochilum Blume - Eare
Basiphyllaea Schlechter - Eepi
Baskervillea Lindley - Ocra
Batemannia Lindley - Ecym
Bathiea Schlechter = Neobathiea Schlechter - Evan
Beadlea Small = Cyclopogon C. Presl - Ocra
Beclardia A. Richard - Evan
Beloglottis Schlechter - Ocra
Benthamia A. Richard - Oorc
Benzingia Dodson - Ecym
Bhutanthera Renz = Herminium L. - Oorc
Bicchia Parlatore = Pseudorchis Séguier - Oorc
Bicornella Lindley = Cynorkis Thouars - Oorc
Bieneria Reichenbach f. = Chloraea Lindley - Ocra
Biermannia King & Pantling - Evan
Bifrenaria Lindley - Ecym
Binotia Rolfe = Gomesa R. Brown - Ecym
Bipinnula Jussieu - Ocra
Birchea A. Richard = Luisia Gaudichaud - Evan
Blephariglottis Rafinesque = Platanthera Richard - Oorc
Bletia Ruiz & Pavon - Eepi
Bletiana Rafinesque = Bletia Ruiz & Pavon - Eepi
Bletilla Reichenbach f. - Eare
Blumeorchis Szlachetko = Cleisostoma Blume - Evan
Bogoria J. J. Smith - Evan
Bolbodium (Lindley) Brieger = Dendrobium Swartz - Emal
Bolbophyllaria Reichenbach f. = Bulbophyllum Thouars - Emal
Bolbophyllopsis Reichenbach f. = Bulbophyllum Thouars - Emal
Bolborkis Zollinger & Moritzi = Nervilia Gaudichaud - Ener
Bollea Reichenbach f. = Pescatoria Reichenbach f. - Ecym
Bolusiella Schlechter - Evan
Bonatea Willdenow - Oorc
Bonniera Cordemoy = Angraecum Bory - Evan
Bothriochilus Lemaire = Coelia Lindley - Eepi
Bouletia M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Braasiella Braem et al. = Tolumnia Rafinesque - Ecym
Brachionidium Lindley - Eepi
Brachtia Reichenbach f. = Brassia R. Brown - Ecym
Brachycladium (Luer) Luer = Andinia (Luer) Luer - Eepi
Brachycorythis Lindley - Oorc
Brachypeza Garay - Evan
Brachystele Schlechter - Ocra
Bracisepalum J. J. Smith - Eare
Braemia Jenny - Ecym
Brasilidium Campacci = Gomesa R. Brown - Ecym
Brasiliorchis R. Singer et al. = Maxillaria Ruiz & Pavon s.l. - Ecym
Brasilocynis G. Gerlach & Whitten = Lueckelia Jenny - Ecym
Brassavola R. Brown - Eepi
Brassia R. Brown - Ecym
Brassiopsis Szlachetko & Górniak = Brassia R. Brown - Ecym
Brenesia Schlechter = Acianthera Schiedw. - Eepi
Brevilongium Christenson = Otoglossum (Schlechter) Garay & Dunsterville - Ecym
Briegeria Senghas = Jacquiniella Schlechter - Eepi
Bromheadia Lindley - Evan
Broughtonia R. Brown - Eepi
Broughtonia Lindley = Otochilus Lindley - Eare
Brownleea Lindley - Oorc
Bryobium Lindley - Epod
Buccella Luer ?= Masdevallia Ruiz & Pavon - Eepi
Bucculina Lindley = Holothrix Lindley - Oorc
Buchtienia Schlechter - Ocra
Buesiella C. Schweinfurth = Cyrtochilum Kunth - Ecym
Bulbophyllum Thouars - Emal
Bulleyia Schlechter - Eare
Burlingtonia Lindley = Rodriguezia Ruiz & Pavon - Ecym
Burnettia Lindlet - Odiu
Burnsbaloghia Szlatcheko = Deiregyne Schlechter - Ocra
Byrsella Luer ?= Masdevallia Ruiz & Pavon - Eepi

Cadetia Gaudichaud = Dendrobium Swartz - Emal
Caladenia R. Brown - Odiu
Calanthe R. Brown - Ecoll
Calanthidum Pfitzer = Calanthe R. Brown - Ecoll
Calcearia Blume = Corybas Salisbury - Odiu
Calceolus Miller = Cypripedium L. - C
Caleana R. Brown - Odiu
Caleya R. Brown = Caleana R. Brown - Odiu
Calliphyllon Bubani = Epipactis Zinn - Eneo
Callista Loureiro = Dendrobium Swartz - Emal
Callithronum Ehrh. = Cephalanthera Richard - Eneo
Callostylis Blume - Epod
Calochilus R. Brown - Odiu
Calopogon R. Brown - Eare
Caluera Dodson & Determann - Ecym
Calymmanthera Schlechter - Evan
Calypso Salisbury - Eepi
Calyptrochilum Kränzl. - Evan
Camaridium Lindley = Maxillaria Ruiz & Pavon s.l. - Ecym
Camarotis Lindley = Micropera Lindley - Evan
Camilleugenia Frappier = Cynorkis Thouars - Oorc
Campanulorchis Brieger - Epod
Campylocentrum Bentham - Evan
Canacorchis Guillaumin = Bulbophyllum Thouars - Emal
Cannaeorchis M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Capanemia Barbosa Rodrigues - Ecym
Cardiochilos P. J. Cribb - Evan
Carenidium D. H. Baptista = Gomesa R. Brown - Ecym
Carparomorchis M. A. Clements & D. L. Jones = Bulbophyllum Thouars - Emal
Carria V. P. Castro & K. G. Lacerda = Gomesa R. Brown - Ecym
Carriella V. P. Castro & K. G. Lacerda = Gomesa R. Brown - Ecym
Carteretia A. Richard = Cleisostoma Blume - Evan
Castroa Guiard = Gomesa R. Brown - Ecym
Catachaetum Hoffmannsegg = Catasetum Kunth - Ecym
Catasetum Kunth - Ecym
Cattleya Lindley - Eepi
Cattleyella van den Berg & M. W. Chase = ?, Eepi
Cattleyopsis Lemaire = Broughtonia R. Brown - Eepi
Caucaea Schlechter - Ecym
Caularthron Rafinesque - Eepi
Caulostylis Rafinesque = Epidendrum L. - Eepi
Celatorchis (R. Rice) R. Rice = Solenangis Schlechter - Evan
Centranthera Scheidw. = Acianthera Schiedw. - Eepi
Centrochilus Schauer = Habenaria Willdenow - Oorc
Centrogenium Schlechter = Eltroplexis Rafinesque - Ocra
Centroglossa Barbosa Rodrigues - Ecym
Centropetalum Lindley = Fernandezia Ruiz & Pavon - Ecym
Centrosis Thouars = Calanthe R. Brown - Ecoll
Centrostigma Schlechter - Oorc
Cephalangraecum Schlechter = Ancistrorhynchus Finet - Evan
Cephalanthera Richard - Eneo
Cephalantheropsis Guillaumin = Calanthe R. Brown s.l. - Ecoll
Cepobaculum M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Ceraia Loureiro = Dendrobium Swartz - Emal
Ceratandra Lindley - Oorc
Ceratandropsis Rolfe = Ceratandra Lindley - Oorc
Ceratium Blume = Callostylis Blume - Epod
Ceratobium (Lindley) M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Ceratocentron Senghas - Evan
Ceratochilus Blume = Trichoglottis Blume - Evan
Ceratochilus Loddiges = Stanhopea Hooker - Ecym
Ceratopsis Lindley = Epipogium Borkh. - Ener
Ceratostylis Blume - Epod
Cerochilus Lindley = Hetaeria Blume - Ocra
Cestichis Pfitz. = Stichorkis Thouars - Emal
Chaenanthe Lindley = Comparettia Poeppig & Endlicher - Ecym
Chaetocephala Barbosa Rodrigues = Myoxanthus Poeppig & Endlicher - Eepi
Chamaeangis Schlechter = Diaphananthe Schlechter - Evan
Chamaeanthus Schlechter - Evan
Chamaegastrodia Makino & F. Maekawa - Ocra
Chamaelorchis Senghas & Lückel = Oncidium Swartz - Ecym
Chamelophyton Garay - Eepi
Chamaerepes Sprengel = Chamorchis Richard - Oorc
Chamelophyton Garay - Eepi
Chamorchis Richard - Oorc
Changnienia S. S. Chien - Eepi
Chaseella Summerhayes = Bulbophyllum Thouars - Emal
Chaubardia Reichenbach f. - Ecym
Chaubardiella Garay - Ecym
Chauliodon Summerhayes - Evan
Cheiradenia Lindley - Ecym
Cheiropterocephalus Barbosa Rodrigues = Malaxis Swartz - Emal
Cheirorchis Carr = Thrixspermum Loureiro - Evan
Cheirostylis Blume - Ocra
Chelonanthera Blume ?= Pholidota Lindley - Eare
Chelonistele Pfitzer - Eare
Chelyorchis Dressler & N. H. Williams = Rossioglossum (Schlechter) Garay & G. C. Kenn. - Ecym
Chelystachya Mytnik & Szlachetko = Polystachya Hooker - Evan
Chenorchis Z. J. Liu et al. = Holcoglossum Schlechter - Evan
Chileorchis Szlachetko = Chloraea Lindley - Ocra
Chiloglottis R. Brown - Odiu
Chilopogon Schlechter = Appendicula Blume - Epod
Chiloschista Lindley - Evan
Chitonanthera Schlechter = Octarrhena Thwaites - Epod
Chitonochilus Schlechter = Agrostophyllum Blume - Eepi
Chloidia Lindley = Tropidia Lindley - Etro
Chloraea Lindley: not monophyletic - Ocra
Chlorosa Blume = Cryptostylis R. Brown - Odiu
Chromatotriccum M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Chondradenia F. Maek. = Galearis Rafinesque - Oorc
Chondrorhyncha Lindley - Ecym
Chondroscaphe (Dressler) Senghas & G. Gerlach - Ecym
Christensonella Szlachetko et al. = Maxillaria Ruiz & Pavon s.l. - Ecym
Christensonia Haager = Vanda R. Brown - Evan
Chroniochilus Schlechter - Evan
Chrysobaphus Wallich = Anoectochilus Blume - Ocra
Chrysocycnis Linden & Reichenbach f. = Mormolyca Fenzl = = Maxillaria Ruiz & Pavon s.l. - Ecym
Chrysoglossella Hatusima = Hancockia Rolfe - Ecoll
Chrysoglossum Blume - Ecoll
Chusua Nevski = Ponerorchis Reichenbach f. - Oorc
Chysis Lindley - Eepi
Chytroglossa Reichenbach f. - Ecym
Cionosaccus Breda = Goodyera R. Brown - Ocra
Cirrhaea Lindley - Ecym
Cirrhopetalum Lindley = Bulbophyllum Thouars - Emal
Cischweinfia Dressler & N. H. Williams - Ecym
Claderia J. D. Hooker - Ecym
Cladobium Lindley = Scaphyglottis Poeppig & Endlicher - Eepi
Cladobium Schlechter = Lankesterella Ames - Ocra
Cleisocentron Brühl - Evan
Cleisomeria D. Don - Evan
Cleisostoma Blume - Evan
Cleisostomopsis Seidenfaden - Evan
Cleistes Lindley - Vpog
Cleistesiopsis Pansarin & Barros - Vp Clematepistephium N. Hallé - Vvan
Clinhymenia A. Richard & Galeotti = Cryptarrhena R. Brown - Ecym
Clowesia Lindley - Ecym
Cnemidia Lindley = Tropidia Lindley - Etro
Coccineorchis Schlechter - Ocra
Cochleanthes Rafinesque - Ecym
Cochlia Blume = Bulbophyllum Thouars - Emal
Cochlioda Lindley = Oncidium Swartz - Ecym
Cocleorchis Szlachetko = Cyclopogon C. Presl - Ocra
Codonorchis Lindley - Ocod
Codonosiphon Schlechter = Bulbophyllum Thouars - Emal
Coelandria Fitzgerald = Dendrobium Swartz - Emal
Coelia Lindley - Eepi
Coeliopsis Reichenbach f. - Ecym
Coeloglossum Hartm. = Dactylorhiza Nevski - Oorc
Coelogyne Lindley - Eare
Coenadenium (Summerhayes) Szlachetko = Angraecopsis Kränzl. - Evan
Cogniauxocharis (Schlechter) Hoehne = Pteroglossa Schlechter - Ocra
Cohnia Reichenbach f. = Trichocentrum Poeppig & Endlicher - Ecym
Cohniella Pfitzer = Trichocentrum Poeppig & Endlicher - Ecym
Coilochilus Schlechter - Odiu
Colax Lindley = Pabstia Garay - Ecym
Collabiopsis S. S. Ying = Collabium Blume - Ecoll
Collabium Blume - Ecoll
Collare-Stuartense Senghas & L. Bockemühl = Oncidium Swartz - Ecym
Collea Lindley = Pelexia Lindley - Ocra
Colombiana Ospina = Pleurothallis R. Brown - Eepi
Comparettia Poeppig & Endlicher - Ecym
Comperia C. Koch = ?, Oorc
Conchidium Griffith - Epod
Condylago Luer = Stelis Swartz - Eepi
Conocidium Romowicz & Szlachetko = Gomesa R. Brown - Ecym
Conostalix (Kränzl.) Brieger = Dendrobium Swartz - Emal
Constantia Barbosa Rodrigues - Eepi
Cooktownia D. L. Jones - Oorc
Coppensia Dumortier = Gomesa R. Brown - Ecym
Corallikyphos H. Fleischm. & Rechinger = Platylepis A. Richard - Ocra
Coralliorrhiza Ascherson = Corallorrhiza Gagnebin - Eepi
Corallorrhiza Gagnebin - Eepi
Corallorrhiza Rafinesque = Corallorrhiza Gagnebin - Eepi
Cordanthera L. O. Williams = Telipogon Kunth - Ecym
Cordylestylis Falconer = Goodyera R. Brown - Ocra
Cordiglottis J. J. Smith = Thrixspermum Loureiro - Evan
Cordula Rafinesque = Paphiopedilum Pfitzer - C
Corisanthes Steudel = Criosanthes Rafinesque = Cypripedium L. - C
Correorchis Szlachetko = Chloraea Lindley - Ocra
Corunastylis Fitzgerald = Genoplesium R. Brown - Odiu
Coryanthes Hooker - Ecym
Corybas Salisbury - Odiu
Corycium Swartz - Oorc
Corydandra Reichenbach f. = Galeandra Lindley - Ecym
Corysanthes R. Brown = Corybas Salisbury - Odiu
Corymbis Lindley = Corymborkis Thouars - Etro
Corymborchis Thouars = Corymborkis Thouars - Etro
Costaricaea Schlechter = Scaphyglottis Poeppig & Endlicher - Eepi
Cottonia Wight - Evan
Cotylolabium Garay - Ocra
Cranichis Swartz - Ocra
Cremastra Lindley - Eepi
Crepidium Blume - Emal
Cribbia Senghas - Evan
Crinonia Blume = Pholidota Lindley - Eare
Criosanthes Rafinesque = Cypripedium L. - C
Crocodeilanthe Reichenbach f. & Warsczewicz = Stelis Swartz - Eepi
Crossangis Schlechter = Rhiphidoglossum Schlechter - Evan
Crossoglossa Dressler & Dodson - Emal
Crossoliparis Marg. - Emal
Crybe Lindley = Bletia Ruiz & Pavon - Eepi
Cryptanthemis Rupp = Rhizanthella R. S. Rogers - Odiu
Cryptarrhena R. Brown - Ecym
Cryptocentrum Bentham = Maxillaria Ruiz & Pavon s.l. - Ecym
Cryptochilus Wallich - Epod
Cryptoglottis Blume = Podochilus Blume - Epod
Cryptophoranthus Barbosa Rodrigues = Acianthera Schiedw. - Eepi
Cryptopus Lindley - Evan
Cryptopylos Garay - Evan
Cryptorchis Makino = Taeniophyllum Blume - Evan
Cryptosaccus Reichenbach f. = Leochilus Knowles & Westc. - Ecym
Cryptosanus Scheidw. = Leochilus Knowles & Westc. - Ecym
Cryptostylis R. Brown - Odiu
Ctenorchis K. Schumann = Angraecum Bory - Evan
Cuclina Rafinesque = Catasetum Kunth - Ecym
Cucumeria Luer = Specklinia Lindley - Eepi
Cuitlauzina Lexarca - Ecym
Cutsis Burns-Balogh et al. = Dichromanthus Garay - Ocra
Cyanaeorchis Barbosa Rodruiges - Ecym
Cyanicula Hopper & A. P. Brown = Caladenia R. Brown s.l. - Odiu
Cyanorchis Steudel = Phaius Loureiro = Calanthe R. Brown s.l. - Ecoll
Cyathoglottis Poeppig & Endlicher Cybebus Garay - Ocra
Cyclopogon C. Presl - Ocra
Cyclosia Klotzsch = Mormodes Lindley - Ecym
Cycnauken Lemaire = Cycnoches Lindley - Ecym
Cycnoches Lindley - Ecym
Cydoniorchis Senghas = Bifrenaria Lindley - Ecym
Cylindrochilus Thwaites = Thrixspermum Loureiro - Evan
Cylindrolobus Blume = Callostylis Blume - Epod
Cylindrolobus (Blume) Brieger = Callostylis Blume - Epod
Cymbidiella Rolfe - Ecym
Cymbidium Swartz - Ecym
Cymbiglossum Halbinger = Rhynchostele Reichenbach f. - Ecym
Cynorchis Thouars = Cynorkis Thouars - Oorc
Cyperorchis Blume = Cymbidium Swartz - Ecym
Cyphochilus Schlechter = Appendicula Blume - Epod
Cypholoron Dodson & Dressler - Ecym
Cypripedium L. - C
Cyrtidiorchis Rauschert = Maxillaria Ruiz & Pavon s.l. - Ecym
Cyrtidium Schlechter = Cyrtidiorchis Rauschert = Maxillaria Ruiz & Pavon s.l. - Ecym
Cyrtochiloides N. H. Williams & M. W. Chase - Ecym
Cyrtochilos Sprengel = Cyrtochilum Kunth - Ecym
Cyrtoglottis Schlechter = Mormolyca Fenzl = Maxillaria Ruiz & Pavon s.l. - Ecym
Cyrtopera Lindley = Eulophia R. Brown - Ecym
Cyrtopodium R. Brown - Ecym
Cyrtorchis Schlechter - Evan
Cyrtosia Blume - Vvan
Cyrtostylis R. Brown - Odiu
Cystopus Blume = Odontochilus Blume - Ocra
Cystorchis Blume - Ocra
Cytherea Salisbury = Calypso Salisbury - Eepi
Cytheris Lindley = Nephelaphyllum Blume - Ecoll

Dactylorhiza Nevski - Oorc
Dactylorchis (Klinge) Vermuelen = Dactylorhiza Nevski - Oorc
Dactylorhynchus Schlechter = Bulbophyllum Thouars - Emal
Dactylostalix Reichenbach f. - Eepi
Dactylostylis Scheidw. = Zygostates Lindley - Ecym
Daiotyla Dressler - Ecym
Danxiaorchis J. W. Zhai et al. - Eepi
Darwinella Braas & Lückel = Telipogon Kunth - Ecym
Darwiniera Braas & Lückel = Telipogon Kunth - Ecym
Daveyjonesia M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Degranvillea Determann - Ocra
Danhatchia Garay & Christenson - Ocra
Danxiaorchis J. W. Zhai et al. - Eepi
Dasyglossum Königer & Schildh. = Cyrtochilum Kunth - Ecym
Deceptor Seidenfaden - Evan
Deiregyne Schlechter - Ocra
Dendrobates M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Dendrobium Swartz - Emal
Dendrochilum Blume - Eare
Dendrocolla Blume = Thrixspermum Loureiro - Evan
Dendrolirium Blume = Callostylis Blume - Epod
Dendrorkis Thouars = Dendrobium Swartz - Emal
Dendrophylax Reichenbach f. - Evan
Deppia Rafinesque = Lycaste Lindley - Ecym
Deroemera Reichenbach f. = Holothrix Lindley - Oorc
Desmotrichum (Blume) Blume = Dendrobium Swartz - Emal
Devogelia Schuit. - Ecoll
Diacrium (Lindley) Bentham = Caularthron Rafinesque - Eepi
Diadeniopsis Szlatchetko = Systeloglossum Schlechter - Ecym
Diadenium Poeppig & Endlicher = Comparettia Poeppig & Endlicher - Ecym
Dialissa Lindley = Stelis Swartz - Eepi
Diaphananthe Schlechter - Evan
Diceratostele Summerhayes - Etri
Dicerostylis Blume = Hylophila Lindley - Ocra
Dichaea Lindley - Ecym
Dichaeopsis Pfitzer = Dichaea Lindley - Ecym
Dichopus Blume = Dendrobium Swartz - Emal
Dichromanthus Garay - Ocra
Dickasonia L. O. Williams - Eare
Dicranotaenia Finet = Microcoelia Lindley - Evan
Dicrypta Lindley = Heterotaxis Lindley = Maxillaria Ruiz & Pavon s.l. - Ecym
Dicrophyla Rafinesque = Ludisia A. Richard - Ocra
Dictyophyllaria Garay = ? Vanilla Miller - Vvan
Didactylus Luer = Acianthera Schiedw. - Eepi
Didiciea King & Prain = Tipularia Nuttall - Eepi
Didothion Rafinesque = Epidendrum L. - Eepi
Didymoplexiella Garay - Egas
Didymoplexiopsis Seidenfaden - Egas
Didymoplexis Grifffith - Egas
Didymostigma Brieger = Cyclopogon C. Presl - Ocra
Dienia Lindley - Emal
Diglyphis Blume = Diglyphosa Blume - Ecoll
Diglyphosa Blume - Ecoll
Dignanthe Lindley = Cuitlauzina Lexarca - Ecym
Dikylikostigma Kränzlin = Discyphus Schlechter - Ocra
Dilochia Lindley - Eare
Dilochiopsis (J. D. Hooker) Brieger - Epod
Dilomilis Rafinesque - Eepi
Dimerandra Schlechter - Eepi
Dimorphorchis Rolfe - Evan
Dinema Lindley - Eepi
Dinklageella Mansfeld - Evan
Diodonopsis Pridgeon & M. W. Chase - Eepi
Diothonea Lindley = Epidendrum L. - Eepi
Dipera Sprengel = Disperis Swartz - Oorc
Diphyes Blume = Bulbophyllum Thouars - Emal
Diphylax J. D. Hooker = Platanthera Richard - Oorc
Diplandrorchis S. S. Chen = Neottia Guettard - Eneo
Diplecthrum Persoon = Satyrium L. - Oorc
Diplocaulobium (Reichenbach f.) Kränzl. = Dendrobium Swartz - Emal
Diplocentrum Lindley - Evan
Diplochilus Lindley = Diplomeris D. Don - Oorc
Diploconchium Schauer = Agrostophyllum Blume - Eepi
Dipolodium Swartz = Pterostylis R. Brown - Ocra
Diplogastra Welwitsch & Reichenbach f. = Platylepis A. Richard - Ocra
Diplolabellum Maekawa = Oreorchis Lindley - Eepi
Diplomeris D. Don - Oorc
Diploprora J. D. Hooker - Evan
Diplaorchis Schlechter = Brachycorythis Lindley - Oorc
Dipodium R. Brown - Ecym
Dipteranthus Barbosa Rodrigues = Zygostates Lindley - Ecym
Dipterostele Schlechter = Telipogon Kunth - Ecym
Disa P. J. Bergius - Oorc
Discyphus Schlechter - Ocra
Diskyphogyne Szlatchetko & R. González = Brachystele Schlechter - Ocra
Disperanthoceros Mytnik & Szlachetko = Polystachya Hooker - Evan
Disperis Swartz - Oorc
Dissorhynchium Schauer = Habenaria Willdenow - Oorc
Disticholiparis Marg. & Szlachetko = Stichorkis Thouars - Emal
Distichorchis M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Distichis Lindley = Stichorkis Thouars - Emal
Distylodon Summerhayes - Evan
Dithrix (J. D. Hooker) Brummitt = Habenaria Willdenow - Oorc
Dithyridanthus Garay = Deiregyne Schlechter - Ocra
Dituilis Rafinesue = Diteilis Rafinesque = Liparis Richard - Emal
Ditulima Rafinesque = Dendrobium Swartz - Emal
Diuris Smith - Odiu
Dockrillia Brieger = Dendrobium Swartz - Emal
Dodsonia Ackerman = Stenia Lindley - Ecym
Dolabrifolia (Pfitzer) Szlachetko & Romowicz = Angraecum Bory - Evan
Domingoa Schlechter - Eepi
Dondodia Luer - Eepi
Doritis Lindley = Phalaenopsis Blume - Evan
Dorycheile Reichenbach = Cephalanthera Richard - Eneo
Dossinia E. Morren - Ocra
Dothilophis Rafinesque = Barkeria Knowles & Westc. - Eepi
Dracomonticola H. P. Linder & Kurzweil - Oorc
Draconanthes (Luer) Luer - Eepi
Dracontia Luer = Stelis Swartz - Eepi
Dracula Luer - Eepi
Drakaea Lindley - Odiu
Dresslerella Luer - Eepi
Dressleria Dodson - Ecym
Dressleriella Brieger = Jacquiniella Schlechter - Eepi
Dryadella Luer - Eepi
Dryadorchis Schlechter - Evan
Drymoanthus Nicholls - Evan
Drymoda Lindley = Bulbophyllum Thouars - Emal
Dryopeia Thouars = Disperis Swartz - Oorc
Dryorkis Thouars = Disperis Swartz - Oorc
Duboisia H. Karst. = Myoxanthus Poeppig & Endlicher - Eepi
Duboisia-Reymondii H. Karst. = Myoxanthus Poeppig & Endlicher - Eepi
Duckeella Porto & Brade - Vpog
Dungsia Chiron & V. P. Castro = Cattleya Lindley - Eepi
Dunstervillea Garay - Ecym
Durabaculum M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Dyakia Christenson - Evan

Earina Lindley - Eepi
Eburophyton A. Heller = Cephalanthera Richard - Eneo
Echinella Pridgeon & M. W. Chase = Echinosepala Pridgeon & M. W. Chase - Eepi
Echinorhyncha Dressler - Ecym
Echinosepala Pridgeon & M. W. Chase - Eepi
Echioglossum Blume = Cleisostoma Blume - Evan
Eckartia Reichenbach f. = Peristeria Hooker - Ecym
Eclecticus O'Byrne - Evan Ecuadoria Dodson & Dressler = Microthelys Garay = ?, Ocra
Effusia Luer = Stelis Swartz - Eepi
Effusiella Luer = Stelis Swartz - Eepi
Eggelingia Summerhayes - Evan
Elasmatium Dulac = Goodyera R. Brown - Ocra
Eleorchis Maekawa - Eare
Eleutheroglossum (Schlechter) M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Elleanthus C. Presl - Esob
Elongatia (Luer) Luer = Pleurothallis R. Brown - Eepi
Eloyella P. Ortiz - Ecym
Eltroplexis Rafinesque - Ocra
Elythranthera (Endlicher) A. S. George = Caladenia R. Brown s.l. - Odiu
Embreea Dodson - Ecym
Empusaria Reichenbach = Empusa Lindley = Liparis Richard - Emal
Empusella (Luer) Luer = Specklinia Lindley - Eepi
Encheiridion Summerhayes = Microcoelia Lindley - Evan
Encyclia Hooker - Eepi
Endeisa Rafinesque = Dendrobium Swartz - Emal
Endresiella Schlechter = Trevoria F. Lehm. - Ecym
Entomophobia de Vogel - Eare
Eparmatostigma Garay = Vanda R. Brown - Evan
Ephemerantha P. F. Hunt & Summerhayes = Dendrobium Swartz - Emal
Ephippianthus Reichenbach f. - Eepi
Ephippium Blume = Bulbophyllum Thouars - Emal
Epibator Luer = Zootrophion Luer - Eepi
Epibarkiella
Epiblastus Schlechter - Epod
Epiblema R. Brown - Odiu
Epicranthes Blume = Bulbophyllum Thouars - Emal
Epidanthus L. O. Williams = Epidendrum L. - Eepi
Epidendropsis Garay & Dunsterville = = Epidendrum L. - Eepi
Epidendrum L. - Eepi
Epidorkis Thouars = Oeonia Lindley - Evan
Epigeneium Gagnepain = Dendrobium Swartz - Emal
Epilyna Schlechter - Esob
Epipactis Séguier = Goodyera R. Brown - Ocra
Epipactis Zinn - Eneo
Epiphanes Reichenbach f. = Didymoplexis Grifffith - Egas
Epiphora Lindley = Polystachya Hooker - Evan
Epiphorella Mytnik & Szlachetko = Polystachya Hooker - Evan
Epipogium Borkh. - Ener
Epipogum S. G. Gmelin = Epipogium Borkh. - Ener
Epistephium Kunth - Vvan
Epithecia Knowles & Westcott = Prosthechea Knowles & Westcott - Eepi
Erasanthe P. J. Cribb et al. - Evan
Eria Lindley - Epod
Eriaxis Reichenbach f. - Vvan
Eriksonella Hopper & A. P. Brown = Caladenia R. Brown s.l. - Odiu
Eriochilus R. Brown - Odiu
Eriodes Rolfe - Ecoll
Eriopexis (Schlechter) Brieger = Dendrobium Swartz - Emal
Eriopsis Lindley - Ecym
Erporchis Thouars = Erporkis Thouars = Platylepis A. Richard - Ocra
Erycina Lindley - Ecym
Erythrodes Blume - Ocra
Erythrorchis Blume - Vvan
Esmeralda Reichenbach f. = Arachnis Blume - Evan
Euanthe Schlechter = Vanda R. Brown - Evan
Euchile (Dressler & G. E. Pollard) Withner = Prosthechea Knowles & Westcott - Eepi
Eucnemis Lindley = Govenia Lindley - Eepi
Eucosia Blume = Goodyera R. Brown - Ocra
Eulophia R. Brown - Ecym
Eulophiella Rolfe - Ecym
Euphlebium (Kränzl.) Brieger = Dendrobium Swartz - Emal
Euprooboscis Griffith = Thelasis Blume - Epod
Euryblema Dressler - Ecym
Eurycaulis M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Eurycentrum Schlechter - Ocra
Eurychone Schlechter - Evan
Eurystyles Wawra - Ocra
Evelyna Poeppig & Endlicher = Elleanthus C. Presl - Esob
Evota (Lindley) Rolfe = Ceratandra Lindley - Oorc
Evotella Kurzweil & H. P. Linder - Oorc
Evrardia Gagnepain = Odontochilus Blume - Ocra
Evrardiana Aver. = Odontochilus Blume - Ocra
Evrardianthe Rauschert = Odontochilus Blume - Ocra
Exalaria Garay & G. A. Romero = Ponthieva R. Brown - Ocra
Exochanthus M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Expedicula Luer = Lepanthopsis (Cogniaux) Ames - Eepi

Fernandezia Ruiz & Pavon - Ecym
Ferruminaria Garay et al. = Bulbophyllum Thouars - Emal
Fieldia Gaudichaud = Vandopsis Pfitzer - Evan
Finetia Schlechter = Vanda R. Brown - Evan
Fingardia Szlachetko = Crepidium Blume - Emal
Fissia Luer ?= Masdevallia Ruiz & Pavon - Eepi
Fissipes Small = Cypripedium L. - C
Fitzgeraldia F. Mueller = Lyperanthus R. Brown - Odiu
Flickeringia A. D. Hawkes = Dendrobium Swartz - Emal
Forficaria Lindley = Disa P. J. Bergius - Oorc
Fractiunguis Schlechter = Scaphyglottis Poeppig & Endlicher - Eepi
Fregea Reichenbach f. = Sobralia Ruiz & Pavon - Esob
Frigidorchis Z. J. Liu & S. C. Chen = Herminium L. - Oorc
Frondaria Luer - Eepi
Froscula Rafinesque = Dendrobium Swartz - Emal
Fruticola (Schlechter) M. A. Clements & D. L. Jones = Bulbophyllum Thouars - Emal
Fuertesiella Schlechter - Ocra
Funkiella Schlechter - Ocra

Gabertia Gaudichaud = Grammatophyllum Blume - Ecym
Galeandra Lindley - Ecym
Galearis Rafinesque - Oorc
Galeola Loureiro - Vvan
Galeoglossum A. Richard & Galeottti - Ocra
Galeorchis Rydberg = Galearis Rafinesque - Oorc
Galeottia A. Richard - Ecym
Galeottiella Schlechter - Ocra
Galera Blume = Epipogium Borkh. - Ener
Gamosepalum Schlechter = Aulosepalum Garay - Ocra
Garaya Szlachetko = Mesadenella Pabst & Garay - Ocra
Garayanthus Szlachetko = Cleisostoma Blume - Evan
Garayella Brieger = Chamelophyton Garay - Eepi
Gastrochilus D. Don - Evan
Gastrodia R. Brown - Egas
Gatsropodium Lindley = = Epidendrum L. - Eepi
Gastrorchis Schlechter = Calanthe R. Brown - Ecoll
Gavilea Poeppig - Ocra
Geerinckia Mytnik & Szlachetko = Polystachya Hooker - Evan
Geesinkorchis de Vogel - Eare
Geissanthera Schlechter = Taeniophyllum Blume - Evan
Gennaria Parlatore - Oorc
Genoplesium R. Brown - Odiu
Genyorchis Schlechter = Bulbophyllum Thouars - Emal
Geobina Rafinesque = Goodyera R. Brown - Ocra
Geoblasta Barbosa Rodrigues = Bipinnula Jussieu - Ocra
Geodorum Jackson - Ecym
Georchia Lindley = Goodyera R. Brown - Ocra
Gerardoa Luer = Specklinia Lindley - Eepi
Gerlachis Szlachetko = Stanhopea Hooker - Ecym
Gersinia Néraud = Dendrobium Swartz - Emal
Ghiesbreghtia A. Richard & Galeotti = Calanthe R. Brown - Ecoll
Gigliolia Barbosa Rodrigues = Octomeria D. Don - Eepi
Giulianettia Rolfe = Glomera Blume - Eare
Glomera Blume - Eare
Glossochilopsis Szlachetko = Crepidium Blume - Emal
Glossodia R. Brown = Caladenia R. Brown s.l. - Odiu
Glossorhyncha Ridley = Glomera Blume - Eare
Glossula Lindley = Peristylus Blume - Oorc
Goadbyella R. S. Rogers = Microtis R. Brown - Odiu
Goldschmidtia Dammer = Dendrobium Swartz - Emal
Gomesa R. Brown - Ecym
Gomphichis Lindley - Ocra
Gomphostylis Lindley = Pleione D. Don - Eare
Gonatostylis Schlechter - Ocra
Gongora Ruiz & Pavon - Ecym
Goniochilus M. W. Chase = Leochilus Knowles & Westc. - Ecym
Gonogona Link = Goodyera R. Brown - Ocra
Goodyera R. Brown - Ocra
Gorgoglossum Schlechter = Sievekingia Reichenbach f. - Ecym
Govenia Lindley - Eepi
Govindooia Wight = Tropidia Lindley - Etro
Gracielanthus R. González & Szlachetko = Aulosepalum Garay - Ocra
Grafia A. D. Hawkes = Phalaenopsis Blume - Evan
Grammangis Reichenbach f. - Ecym
Grammatophyllum Blume - Ecym
Grandiphyllum Docha Neto - Ecym
Graphorkis Thouars - Ecym
Grastidium (Blume) Blume = Dendrobium Swartz - Emal
Greenwoodia Burns-Balogh = Kionophyton Garay - Ocra
Grobya Lindley - Ecym
Grosourdya Reichenbach f. - Evan
Grussia M. Wolff = Phalaenopsis Blume - Evan
Guanchezia G. A. Romero & Carnevali - Ecym
Guarianthe Dressler & W. E. Higgins - Eepi
Gudrunia Braem = Tolumnia Rafinesque - Ecym
Gularia Garay = Schiedeella Schlechter - Ocra
Gunnarella Senghas - Evan
Gunnaria Z. J. Liu & L. J. Chen = Vanda R. Brown - Evan
Gunnia Lindley = Sarcochilus R. Brown - Evan
Gussonea A. Richard = Microcoelia Lindley - Evan
Gyalanthos Szlachetko & Marg. = Pabstiella Brieger & Senghas - Eepi
Gyas Salisbury = Bletia Ruiz & Pavon - Eepi
Gymnadenia R. Brown - Oorc
Gynadenia Schlechter = Brachycorythis Lindley - Oorc
Gymnadeniopsis Rydberg = Platanthera Richard - Oorc
Gymnochilus Blume = Cheirostylis Blume - Ocra
Gynoglottis J. J. Smith - Eare
Gyrostachys Blume = Spiranthes Richard - Ocra

Habenaria Willdenow - Oorc
Habenorkis Thouars = Habenaria Willdenow - Oorc
Hadrolaelia (Schlechter) Chiron & V. P. Castro = Cattleya Lindley - Eepi
Haemaria Lindley (1833) = Goodyera R. Brown - Ocra
Haemaria Lindley (1840) = Ludisia A. Richard - Ocra
Hagsatera R. González - Eepi
Hakoneaste Maek. = Ephippianthus Reichenbach f. - Eepi
Hallackia Harvey = Huttonaea Harvey - Oorc
Halleorchis Szlachetko & Olszewski - Ocra
Hammarbya Kuntze - Emal
Hamularis Aver. & Averyanova = Bulbophyllum Thouars - Emal
Hancockia Rolfe - Ecoll
Hapalochilus (Schlechter) Senghas = Bulbophyllum Thouars - Emal
Hapalorchis Schlechter - Ocra
Haplochilus Endlicher = Zeuxine Lindley - Ocra
Haraella Kudô = Gastrochilus D. Don - Evan
Harrisella Fawcett & Rendle = Dendrophylax Reichenbach f. - Evan
Hartwegia Lindley = Domingoa Schlechter - Eepi
Hecabe Rafinesque = Phaius Loureiro = Calanthe R. Brown s.l. - Ecoll
Hederorkis Thouars - Evan
Helcia Lindley = Trichopilia Lindley - Ecym
Helleriella A. D. Hawkes - Eepi
Hellerorchis A. D. Hawkes = Gomesa R. Brown - Ecym
Helonoma Garay - Ocra
Helorchis Schlechter = Cynorkis Thouars - Oorc
Hemihabenaria Finet = Pecteilis Rafinesque - Oorc
Hemiperis Frappier = Cynorkis Thouars - Oorc
Hemipilia Lindley - Oorc
Hemipiliopsis Y. B. Luo & S. C. Chen = Hemipilia Lindley - Oorc
Hemiscleria Lindley = = Epidendrum L. - Eepi
Henosis J. D. Hooker = Bulbophyllum Thouars - Emal
Herminium L. - Oorc
Herpethophytum (Schlechter) Brieger = Dendrobium Swartz - Emal
Herpysma Lindley - Ocra
Herschelia Lindley = Disa P. J. Bergius - Oorc
Herscelianthe Rauschert = Disa P. J. Bergius - Oorc
Hetaeria Blume - Ocra
Heteranthocidium Szlachetko et al. = Oncidium Swartz - Ecym
Heterotaxis Lindley = Maxillaria Ruiz & Pavon s.l. - Ecym
Heterozeuxine Hashimoto = Zeuxine Lindley - Ocra
Hexadesmia Brongniart = Scaphyglottis Poeppig & Endlicher - Eepi
Hexalectris Rafinesque - Eepi
Hexameria R. Brown = Podochilus Blume - Epod
Hexisea Lindley = Scaphyglottis Poeppig & Endlicher - Eepi
Himantoglossum Sprengel - Oorc
Hintonella Ames - Ecym
Hippeophyllum Schlechter - Emal
Hippoglossum Breda = Bulbophyllum Thouars - Emal
Hipporkis Thouars = Satyrium L. - Oorc
Hirtzia Dodson = Pterostemma Kränzlin - Ecym
Hispaniella Braem = Tolumnia Rafinesque - Ecym
Hoehneella Ruschi - Ecym
Hoffmannseggella H. G. Jones = Cattleya Lindley - Eepi
Hofmeistera Reichenbach f. = Hofmeisterella Reichenbach f. - Ecym
Hofmeisterella Reichenbach f. - Ecym
Holcoglossum Schlechter - Evan
Holmesia P. J. Cribb = Angraecopsis Kränzl. - Evan
Hologyne Pfitzer = Coelogyne Lindley - Eare
Holopogon Komarov & Nevski = Neottia Guettard - Eneo
Holothrix Lindley - Oorc
Homalocollecticon (Summerhayes) Szlachetko & Olszewski = Cyrtorchis Schlechter - Evan
Homalopetalum Rolfe - Eepi
Hordeanthos Szlachetko = Bulbophyllum Thouars - Emal
Horichia Jenny - Ecym
Hormidium Heyn. = Prosthechea Knowles & Westcott - Eepi
Horvatia Garay - Ecym
Houlletia Brongniart - Ecym
Hsenhsua X.-H. Jin et al. - Oorc
Humboldtia Ruiz & Pavon = Stelis Swartz - Eepi
Huntleya Lindley - Ecym
Huttonaea Harvey - Oorc
Hydranthus Reichenbach f. = Dipodium R. Brown - Ecym
Hylaeorchis G. A. Romero & Carnevali = Maxillaria Ruiz & Pavon s.l. - Ecym
Hyalosema (Schlechter) Rolfe = Bulbophyllum Thouars - Emal
Hybochilus Schlechter = Leochilus Knowles & Westc. - Ecym
Hygrochilus Pfitzer = Phalaenopsis Blume - Evan
Hylophila Lindley - Ocra
Hymeneria (Lindley) M. A. Clements & D. L. Jones = Pinalia Lindley - Epod
Hymenorchis Schlechter - Evan
Hypodema Reichenbach = Cypripedium L. - C
Hypodematium A. Richard = Eulophia R. Brown - Ecym
Hysteria Reinwardt = Corymborkis Thouars - Etro

Ibidium Small = Spiranthes Richard - Ocra
Ichthyostomum D. L. Jones et al. = Bulbophyllum Thouars - Emal
Ida A. Ryan & Oakeley = Sudamerlycaste Archila - Ecym
Iebine Rafinesque = Liparis Richard - Emal
Imerinaea Schlechter - Ecym
Incaea Luer = Dryadella Luer - Eepi
India A. N. Rao = Robiquetia Gaudichaud - Evan
Inobulbum (Schlecter) Kränzl. = Dendrobium Swartz - Emal
Inti M. A. Blanco = Maxillaria Ruiz & Pavon s.l. - Ecym
Ione Lindley = Bulbophyllum Thouars - Emal
Ionopsis Kunth - Ecym
Ionorchis G. Beck = Limodorum Boehmer - Eneo
Ipsea Lindley - Ecoll
Irenea Szlachetko et al. = Cyrtochilum Kunth - Ecym
Iridorchis Blume = Cymbidium Swartz - Ecym
Iridorchis Thouars = Iridorkis Thouars = Oberonia Lindley - Emal
Isabelia Barbosa Rodrigues - Eepi
Ischnocentrum Schlechter = Glomera Blume - Eare
Ischnogyne Schlechter - Eare
Isochilostachya Mytnik & Szlachetko = Polystachya Hooker - Evan
Isochilus R. Brown - Eepi
Isotria Rafinesque - Vpog
Ixyophora Dressler - Ecym

Jacquiniella Schlechter - Eepi
Jamaiciella Braem = Tolumnia Rafinesque - Ecym
Jansenia Barbosa Rodrigues = Plectrophora H. Focke - Ecym
Jejewoodia Szlachetko - Evan
Jejosephia A. N. Rao & Mani = Bulbophyllum Thouars - Emal
Jenmania Rolfe = Palmorchis Barbosa Rodrigues - Eneo
Jennyella Lückel & Fessel = Houlletia Brongniart - Ecym
Jensoa Rafinesque = Cymbidium Swartz - Ecym
Josephia Wight = Sirhookera Kuntze - Evan
Jostia Luer = Masdevallia Ruiz & Pavon - Eepi
Jouyella Szlachetko = Chloraea Lindley - Ocra
Jumellea Schlechter - Evan

Kalimpongia Pradhen = Dickasonia L. O. Williams - Eare
Kalopternix Garay & Dunsterville = Epidendrum L. - Eepi
Katherinea A. D. Hawkes = Dendrobium Swartz - Emal
Kaurorchis D. L. Jones & M. A. Clements = Bulbophyllum Thouars - Emal
Kefersteinia Reichenbach f. - Ecym
Kegelia Reichenbach f. = Kegeliella Mansfeld - Ecym
Kegeliella Mansfeld - Ecym
Kerigomnia P. van Royen = Octarrhena Thwaites - Epod
Kinetochilus (Schlechter) Brieger = Dendrobium Swartz - Emal
Kingidium P. F. Hunt = Phalaenopsis Blume - Evan
Kingiella Rolfe = Phalaenopsis Blume - Evan
Kionophyton Garay - Ocra
Kitigorchis Maekawa = Oreorchis Lindley - Eepi
Kleberiella V. P. Castro & Catharino = Gomesa R. Brown - Ecym
Kochiophyton Cogniaux = Aganisia Lindley - Ecym
Koellensteinia Reichenbach f. - Ecym
Konantzia Dodson & N. H. Williams = Ionopsis Kunth - Ecym
Kornasia Szlachetko = Orestias Ridley - Emal
Kraenzlinella Kuntze - Eepi
Kreodanthus Garay - Ocra
Kryptostoma (Summerhayes) Geerink = Habenaria Willdenow - Oorc
Kuhlhasseltia J. J. Smith - Ocra

Lacaena Lindley - Ecym
Lacroixia Szlachetko & Olszewski = Dinklageella Mansfeld - Evan
Laelia Lindley - Eepi
Laeliopsis Lindley = Broughtonia R. Brown - Eepi
Lalexia Luer = Pleurothallis R. Brown - Eepi
Lanium (Lindley) Bentham = = Epidendrum L. - Eepi
Lankesterella Ames - Ocra
Lankesteriana Karremans - Eepi
Lariorchis Szlachetko = Ornithidium R. Brown s.str. = Maxillaria Ruiz & Pavon s.l. - Ecym
Larnandra Rafinesque = Epidendrum L. - Eepi
Latouria Blume = Dendrobium Swartz - Emal
Latourorchis Brieger = Dendrobium Swartz - Emal
Leaoa Schlechter & Porto = Scaphyglottis Poeppig & Endlicher - Eepi
Lecanorchis Blume - Vvan
Lectandra J. J. Smith = Poaephyllum Ridley - Epod
Leioanthum M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Lemboglossum Halbinger = Rhynchostele Reichenbach f. - Ecym
Lemuranthe Schlechter = Cynorkis Thouars - Oorc
Lemurella Schlechter - Evan
Lemurorchis Kränzl. - Evan
Leochilus Knowles & Westc. - Ecym
Leopardanthus Blume = Dipodium R. Brown - Ecym
Lepanthanthe (Schlechter) Szlachetko = Bulbophyllum Thouars - Emal
Lepanthes Swartz - Eepi
Lepanthopsis (Cogniaux) Ames - Eepi
Lepervenchea Cordemoy = Angraecum Bory - Evan
Lepidogyne Blume - Ocra
Leporella A. S. George - Odiu
Leptocentrum Schlechter = Plectrelminthus Rafinesque - Evan
Leptoceras (R. Brown) Lindley - Odiu
Leptoceras Fitzgerald = Leporella A. S. George - Odiu
Leptorchis Thouars = Leptorkis Thouars = Liparis Richard - Emal
Leptotes Lindley - Eepi
Leptothrium Kunth = Isochilus R. Brown - Eepi
Lequeetia Bubani = Limodorum Boehmer - Eneo
Lesliea Seidenfaden = Phalaenopsis Blume - Evan
Leucohyle Klotzsch = Trichopilia Lindley - Ecym
Leucolaena Ridley = Didymoplexiella Garay - Egas
Leucorchis Blume = Didymoplexis Grifffith - Egas
Leucorchis E. Meyer = Pseudorchis Séguier - Oorc
Leucostachys Hoffmannsegg = Goodyera R. Brown - Ocra
Lichenora Wight = Porpax Lindley - Epod
Lichterveldia Lem. = Cuitlauzina Lexarca - Ecym
Ligeophila Garay = Aspidogyne Garay - Ocra
Limatodes Blume = Phaius Loureiro = Calanthe R. Brown s.l. - Ecoll
Limnorchis Rydberg = Platanthera Richard - Oorc
Limus Ehrh. = Malaxis Swartz - Emal
Limodorum Boehmer - Eneo
Limodorum Willdenow = Calanthe R. Brown - Ecoll
Lindleyalis Luer = Pleurothallis R. Brown - Eepi
Lindleyella Schlechter = Rudolfiella Hoehne - Ecym
Lindsayella Ames & C. Schweinfurth = Sobralia Ruiz & Pavon - Esob
Liparis Richard - Emal
Lisowskia Szlachetko = Orestias Ridley - Emal
Lissochilus R. Brown = Eulophia R. Brown - Ecym
Listera R. Brown = Neottia Guettard - Eneo
Listrostachys Reichenbach f. - Evan
Lobogyne Schlechter = Appendicula Blume - Epod
Lockhartia Hooker - Ecym
Lockia Aver. = Luisia Gaudichaud - Evan
Loddigesia Luer = Lalexia Luer = Pleurothallis R. Brown - Eepi
Loefgrenianthus Hoehne - Eepi
Lomax Luer = Stelis Swartz - Eepi
Lophiarella Szlachetko et al. = Trichocentrum Poeppig & Endlicher - Ecym
Lophiaris Rafinesque = Trichocentrum Poeppig & Endlicher - Ecym
Lophoglottis Rafinesque = Cattleya Lindley - Eepi
Loroglossum Richard = Himantoglossum Sprengel - Oorc
Lothiana Kränzlin = Porroglossum Schlechter - Eepi
Lowianthus Beccari = Dimorphorchis Rolfe - Evan
Loxoma Garay = Smithsonia C. J. Saldanha - Evan
Loxomorchis Rauschert = Smithsonia C. J. Saldanha - Evan
Ludisia A. Richard - Ocra
Lueckelia Jenny - Ecym
Lueddemannia Linden & Reichenbach f. - Ecym
Lueranthos Szlachetko & Marg. = Andinia (Luer) Luer - Eepi
Luerella Braas = Phloeophila Hoehne & Schlechter - Eepi
Luisia Gaudichaud - Evan
Luisiopsis C. S. Kumar & P. C. S. Kumar = Gastrochilus D. Don - Evan
Luzama Luer ?= Masdevallia Ruiz & Pavon - Eepi
Lycaste Lindley - Ecym
Lycomormium Reichenbach f. - Ecym
Lyperanthus R. Brown - Odiu
Lyraea Lindley = Bulbophyllum Thouars - Emal
Lyroglossa Schlechter - Ocra
Lysiella Rydberg = Platanthera Richard - Oorc

Maccraithea M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Macdonaldia Lindley = Thelymitra J. R. Forster & G. Forster - Odiu
Macodes (Blume) Lindley - Ocra
Macradenia R. Brown - Ecym
Macrochilus Knowles & Westc. = Miltonia Lindley - Ecym
Macroclinium Barbosa Rodrigues - Ecym
Macrolepis A. Richard = Bulbophyllum Thouars - Emal
Macroplectrum Pfitzer = Angraecum Bory - Evan
Macropodanthus L. O Williams - Evan
Macrostomium (Blume) Blume = Dendrobium Swartz - Emal
Macrostylis Breda = Corymborkis Thouars - Etro
Madisonia Luer - Eepi
Malachadenia Lindley = Bulbophyllum Thouars - Emal
Malaenia Dumortier = Cattleya Lindley - Eepi
Malaxis Swartz - Emal
Malleola J. J. Smith & Schlechter = Robiquetia Gaudichaud - Evan
Manniella Reichenbach f. - Ocra
Mapinguari Carnevali & R. B. Singer = Maxillaria Ruiz & Pavon s.l. - Ecym
Margelliantha P. J. Cribb - Evan
Mariarisqueta Guinea = Cheirostylis Blume - Ocra
Marsupiaria Hoehne = Heterotaxis Lindley = Maxillaria Ruiz & Pavon s.l. - Ecym
Masdevallia Ruiz & Pavon - Eepi
Masdevalliantha (Luer) Szlachetko & Marg. = Pleurothallis R. Brown - Eepi
Mastigion Garay et al. = Bulbophyllum Thouars - Emal
Maxillaria Ruiz & Pavon - Ecym
Maxillariella M. A. Blanco & Carnevali = Maxillaria Ruiz & Pavon s.l. - Ecym
Mediocalcar J. J. Smith - Epod
Megaclinium Lindley = Bulbophyllum Thouars - Emal
Megalorchis H. Perrier - Oorc
Megalotus Garay = Robiquetia Gaudichaud - Evan
Megastylis (Schlechter) Schlechter - Odiu
Megema Luer ?= Masdevallia Ruiz & Pavon - Eepi
Meiracyllium Reichenbach f. - Eepi
Meliclis Rafinesque = Coryanthes Hooker - Ecym
Menadena Rafinesque = Maxillaria Ruiz & Pavon - Ecym
Menadenium Rafinesque = Zygosepalum (Reichenbach f.) Reichenbach f. - Ecym
Mendoncella A. D. Hawkes = Galeottia A. Richard - Ecym
Meneziella Chiron & V. P. Castro = Gomesa R. Brown - Ecym
Mesadenella Pabst & Garay - Ocra
Mesadenus Schlechter - Ocra
Mesoclastes Lindley = Luisia Gaudichaud - Evan
Mesodactylis Wallich = Apostasia Blume - A
Mesoglossum Halbinger = Rhynchostele Reichenbach f. - Ecym
Mesoptera Rafinesque = Liparis Richard - Emal
Mesospinidium Reichenbach f. = Brassia R. Brown - Ecym
Metachilum Lindley = Appendicula Blume - Epod
Mexicoa Garay = Oncidium Swartz - Ecym
Mexipedium V. A. Albert & M. W. Chase - C
Microchilus C. Presl - Ocra
Microcoelia Lindley - Evan
Microepidendrum W. E. Higgins - Eepi
Microholmesia P. J. Cribb = Angraecopsis Kränzl. - Evan
Microlaelia (Schlechter) Chiron & V. P. Castro = Cattleya Lindley - Eepi
Micropera Dalzell = Smithsonia C. J. Saldanha - Evan
Micropera Lindley - Evan
Microphytanthe (Schlechter) Brieger = Dendrobium Swartz - Emal
Microsaccus Blume - Evan
Microstylis (Nuttall) Eaton = Malaxis Swartz - Emal
Microtatorchis Schlechter = Taeniophyllum Blume - Evan
Microterangis (Schlechter) Senghas = Aerangis Reichenbach f. - Evan
Microtheca Schlechter = Cynorkis Thouars - Oorc
Microthelys Garay = Funkiella Schlechter - Ocra
Microtis R. Brown - Odiu
Miltonia Lindley - Ecym
Miltonioides Brieger & Lückel = Oncidium Swartz - Ecym
Miltoniopsis God.-Leb. - Ecym
Minicolumna Brieger = Epidendrum L. - Eepi
Mirandopsis Szlachetko & Marg. = Pleurothallis R. Brown - Eepi
Mischobulbum Schlechter = Tainia Blume - Ecoll
Mitostigma Blume = Ponerorchis Reichenbach f. - Oorc
Mixis Luer = Pleurothallis R. Brown - Eepi
Mobilabium Rupp - Evan
Moerenhoutia Blume = Platylepis A. Richard - Ocra
Monachanthus Lindley = Catasetum Kunth - Ecym
Monadenia Lindley = Disa P. J. Bergius - Oorc
Monanthochilus (Schlechter) R. Rice = Sarcochilus R. Brown - Evan
Monanthos (Schlechter) Brieger = Dendrobium Swartz - Emal
Monixus Finet = Angraecum Bory - Evan
Monochilus Lindley = = Zeuxine Lindley - Ocra
Monomeria Lindley = Bulbophyllum Thouars - Emal
Monophyllorchis Schlechter - Etri
Monorchis Seguier = Herminium L. - Oorc
Monosepalum Schlechter = Bulbophyllum Thouars - Emal
Monustes Rafinesque = Spiranthes Richard - Ocra
Moontris Lindley = Holothrix Lindley - Oorc
Montolivaea Reichenbach f. = Habenaria Willdenow - Oorc
Moorea Rolfe = Neomoorea Rolfe - Ecym
Mormodes Lindley - Ecym
Mormolyca Fenzl = Maxillaria Ruiz & Pavon s.l. - Ecym
Muluorchis J. J. Wood = Tropidia Lindley - Etro
Muscarella Luer = Specklinia Lidley - Eepi
Myanthus Lindley = Catasetum Kunth - Ecym
Mycaranthes Blume - Epod
Myobroma Salisbury = Vanilla Miller - Vvan
Myoda Lindley = Ludisia A. Richard - Ocra
Myoxanthus Poeppig & Endlicher - Eepi
Myrmechis (Lindley) Blume - Ocra
Myrmecophila Rolfe - Eepi
Myrosmodes Reichenbach f. - Ocra
Mystacidium Lindley - Evan
Mystacorchis Szlachetko & Marg. = Stelis Swartz - Eepi
Mystax Luer = Stelis Swartz - Eepi

Nabaluia Ames - Eare
Nageliella L. O. Williams = Domingoa Schlechter - Eepi
Nanodes Lindley = Epidendrum L. - Eepi
Narica Rafinesque = Sarcoglottis C. Presl - Ocra
Nasonia Lindley = Fernandezia Ruiz & Pavon - Ecym
Nauenia Klotzsch = Lacaena Lindley - Ecym
Neippergia C. Morren = Acineta Lindley - Ecym
Nemaconia Knowles & Westc. - Eepi
Nematoceras J. D. Hooker = Corybas Salisbury - Odiu
Neobartlettia Schlechter = Palmorchis Barbosa Rodrigues - Eneo
Neobathiea Schlechter - Evan
Neobennettia Senghas = Lockhartia Hooker - Ecym
Neobenthamia Rolfe = Polystachya Hooker - Evan
Neobolusia Schlechter - Oorc
Neoburttia Mytnik et al. = Polystachya Hooker - Evan
Neoclemensia Carr = Gastrodia R. Brown - Egas
Neocogniauxia Schlechter - Eepi
Neocribbia Szlachetko = Solenangis Schlechter - Evan
Neodryas Reichenbach f. = Cyrtochilum Kunth - Ecym
Neoescobaria Garay = Trichopilia Lindley - Ecym
Neofinetia Hu = Vanda R. Brown - Evan
Neogardneria Garay - Ecym
Neogyna Reichenbach f. - Eare
Neokoehleria Schlechter = Comparettia Poeppig & Endlicher - Ecym
Neolauchea Kränzlin = Isabelia Barbosa Rodrigues - Eepi
Neolehmannia Kränzlin = Epidendrum L. - Eepi
Neolindleya Kränzlin - Oorc
Neomoorea Rolfe - Ecym
Neoruschia Catharino & V. P. Castro = Gomesa R. Brown - Ecym
Neotinea Reichenbach f. - Oorc
Neottia Guettard - Eneo
Neottianthe Schlechter = Ponerorchis Reichenbach f. - Oorc
Neottidium Schlechtendahl = Neottia Guettard - Eneo
Neourbania Fawcett & Rendle = Ornithidium R. Brown s.str. = Maxillaria Ruiz & Pavon s.l. - Ecym
Neowilliamsia Garay = Epidendrum L. - Eepi
Neowolffia O. Gruss = Podangis Schlechter - Evan
Nephelaphyllum Blume - Ecoll
Nephrangis Summerhayes - Evan
Nephranthera Hasskarl = Renanthera Loureiro - Evan
Nervilia Gaudichaud - Ener
Neuwiedia Blume - A
Nidema Britton & Millspaugh - Eepi
Nidus Rivin. = Neottia Guettard - Eneo
Niemeyera F. Mueller = Apostasia Blume - A
Nienokuea A. Chevalier = Polystachya Hooker - Evan
Nigritella Richard = Gymnadenia R. Brown - Oorc
Niphantha Luer = Stelis Swartz - Eepi
Nipponorchis Masamune = Vanda R. Brown - Evan
Nitidobulbon Ojeda et al. = Maxillaria Ruiz & Pavon s.l. - Ecym
Nohawilliamsia M. W. Chase & Whitten - Ecym
Notheria O'Byrne & Vermuelen - Epod
Nothodoritis Z. H. Tsi = Phalaenopsis Blume - Evan
Nothostele Garay - Ocra
Notiophrys Lindley = Platylepis A. Richard - Ocra
Notylia Lindley - Ecym
Notyliopsis P. Ortiz - Ecym
Nujiangia X. H. Jin & D. Z. Li = Habenaria Willdenow - Oorc
Nyctosma Rafinesque = Epidendrum L. - Eepi

Oakesamesia C. Schweinfurth & P. H. Allen = Ornithocephalus Hooker - Ecym
Oberonia Lindley - Emal
Oberonioides Szlachetko - Emal
Octadesmia Bentham = Dilomilis Rafinesque - Eepi
Octarrhena Thwaites - Epod
Ochyrella Szlatcheko & R. González = Pteroglossa Schlechter - Ocra
Octandrorchis Brieger = Octomeria D. Don - Eepi
Octomeria D. Don - Eepi
Odontochilus Blume - Ocra
Odontoglossum Kunth = Oncidium Swartz - Ecym
Odontorrhynchus M. N. Correa - Ocra
Odontostylis Breda = Bulbophyllum Thouars - Emal
Oeceoclades Lindley - Ecym
Oeonia Lindley - Evan
Oeoniella Schlechter - Evan
Oerstedella Reichenbach f. = Epidendrum L. - Eepi
Oestlundia W. E. Higgins - Eepi
Oestlundorchis Szlatcheko = Deiregyne Schlechter - Ocra
Orbis Luer = Pleurothallis R. Brown - Eepi
Ogygia = Acianthera Schiedw. - Eepi
Olgasis Rafinesque = Tolumnia Rafinesque - Ecym
Oligophyton H. P. Linder - Oorc
Oliveriana Reichenbach f. - Ecym
Ommatodium Lindley = Pterygodium Swartz - Oorc
Omoea Blume - Evan
Oncidium Swartz - Ecym
Oncodia Lindley = Brassia R. Brown - Ecym
Oncophyllum D. L. Jones & M. A. Clements = Bulbophyllum Thouars - Emal
Onychium (Blume) Blume = Dendrobium Swartz - Emal
Ophidion Luer = Phloeophila Hoehne & Schlechter - Eepi
Ophioglossella Schuit. & Ormerod - Evan
Ophrys L. - Oorc
Orchiastrum Séguier = Spiranthes Richard - Ocra
Orchidofunkia A. Richard & Galeotti = Cryptarrhena R. Brown - Ecym
Orchidotypus Kränzl. = Fernandezia Ruiz & Pavon - Ecym
Orchipedium Breda - Ocra
Orchioides Kunze = Goodyera R. Brown - Ocra
Orchis L. - Oorc
Orchites Schur = Traunsteinera Reichenbach - Oorc
Oreorchis Lindley - Eepi
Orestias Ridley - Emal
Orleanesia Barbosa Rodruigues - Eepi
Orchidotypus Kränzlin = Fernandezia Ruiz & Pavon - Ecym
Ormerodia Szlachetko = Cleisostoma Blume - Evan
Ormostema Rafinesque = Dendrobium Swartz - Emal
Ornitharium Lindley & Paxton = Pteroceras Hasskarl - Evan
Ornithidium R. Brown = Maxillaria Ruiz & Pavon s.l. - Ecym
Ornithocephalus Hooker - Ecym
Ornithochilus (Lindley) Bentham & J. D. Hooker = Phalaenopsis Blume - Evan
Ornithophora Barbosa Rodrigues = Gomesa R. Brown - Ecym
Orsidice Reichenbach f. = Thrixspermum Loureiro - Evan
Orthoceras R. Brown - Odiu
Orthochilus A. Richard = Eulophia R. Brown - Ecym
Orthopenthea Rolfe = Disa P. J. Bergius - Oorc
Orxera Rafinesque = Aerides Loureiro - Evan
Osmoglossum Schlechter = Cuitlauzina Lexarca - Ecym
Ossiculum P. J. Cribb & Laan - Evan
Osyricera Blume = Bulbophyllum Thouars - Emal
Otochilus Lindley - Eare
Otoglossum (Schlechter) Garay & Dunsterville - Ecym
Otopetalum Lehm. & Kränzlin = Kraenzlinella Kuntze - Eepi
Otostylis Schlechter - Ecym
Oxyanthera Brongniart = Thelasis Blume - Epod
Oxyglossella M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Oxysepala Wight = Bulbophyllum Thouars - Emal
Oxystophyllum Blume - Epod

Pabstia Garay - Ecym
Pabstiella Brieger & Senghas - Eepi
Pachites Lindley - Oorc
Pachychilus Blume = Pachystoma Blume - Ecoll
Pachygenium Szlachetko et al. = Pelexia Lindley - Ocra
Pachyne Salisbury = Phaius Loureiro = Calanthe R. Brown s.l. - Ecoll
Pachyphyllum Kunth = Fernandezia Ruiz & Pavon - Ecym
Pachyplectron Schlechter - Ocra
Pachystele Schlechter = Scaphyglottis Poeppig & Endlicher - Eepi
Pachystoma Blume - Ecoll
Paliris Dumortier = Liparis Richard - Emal
Palmorchis Barbosa Rodrigues - Eneo
Palumbina Reichenbach f. = Cuitlauzina Lexarca - Ecym
Panisea Lindley - Eare
Panmorphia Luer = Anathallis Barbosa Rodrigues - Eepi
Panstrepis Rafinesque = Coryanthes Hooker - Ecym
Pantlingia Prain = Stigmatodactylus Makino - Odiu
Paphinia Lindley - Ecym
Paphiopedilum Pfitzer - C
Papilionanthe Schlechter - Evan
Papillilabium Dockrill - Evan
Papperitzia Reichenbach f. = Leochilus Knowles & Westc. - Ecym
Papuaea Schlechter - Ocra
Papulipetalum (Schlechter) M. A. Clements & D. L. Jones = Bulbophyllum Thouars - Emal
Paracalanthe Kudô = Calanthe R. Brown - Ecoll
Paracaleana Blaxell - Odiu
Paradisanthus Reichenbach f. - Ecym
Paragnathis Sprengel = Diplomeris D. Don - Oorc
Paraholcoglossum Z. J. Liu et al. = Holcoglossum Schlechter - Evan
Paralophia P. J. Cribb & J. Hermans - Ecym
Parapactis W. Zimm. = Epipactis Zinn - Eneo
Paraphalaenopsis A. D. Hawkes - Evan
Parapteroceras Aver. = Tuberolabium Yamam. - Evan
Parasarcochilus Dockrill = Sarcochilus R. Brown - Evan
Parhabenaria Gagnepain = Pecteilis Rafinesque - Oorc
Parlatorea Barbosa Rodrigues = Sanderella Kuntze - Ecym
Pattonia Wight = Grammatophyllum Blume - Ecym
Pecteilis Rafinesque - Oorc
Pectinaria (Bentham) Cordemoy = Angraecum Bory - Evan
Pedilochilus Schlechter = Bulbophyllum Thouars - Emal
Pedilonum (Blume) Blume = Dendrobium Swartz - Emal
Pelatantheria Ridley - Evan
Pelexia Lindley - Ocra
Pelma Finet = Bulbophyllum Thouars - Emal
Peltopus (Schlechter) Szlachetko & Marg. = Bulbophyllum Thouars - Emal
Penkimia Phukan & Odyuo = Holcoglossum Schlechter - Evan
Pennilabium J. J. Smith - Evan
Penthea Lindley = Disa P. J. Bergius - Oorc
Peristeranthus T. E. Hunt - Evan
Peristeria Hooker - Ecym
Peristylus Blume - Oorc
Perrieriella Schlechter = Oeonia Lindley - Evan
Pescatoria Reichenbach f. - Ecym
Pesomeria Lindley = Phaius Loureiro = Calanthe R. Brown s.l. - Ecoll
Petalocentrum Schlechter = Oncidium Swartz - Ecym
Petalochilus R. S. Rogers = Caladenia R. Brown - Odiu
Petalodon Luer ?= Masdevallia Ruiz & Pavon - Eepi
Petronia Barbosa Rodrigues = Batemannia Lindley - Ecym
Pfitzeria Senghas = Comparettia Poeppig & Endlicher - Ecym
Phaeus Post & Kuntze = Phajus Lindley = Phaius Loureiro = Calanthe R. Brown s.l. - Ecoll
Phalaenopsis Blume - Evan
Pheladenia D. L. Jones & M. A. Clements = Caladenia R. Brown s.l. - Odiu
Philippinaea Schlechter & Ames = Orchipedium Breda - Ocra
Phloeophila Hoehne & Schlechter - Eepi
Pholidota Lindley - Eare
Phormangis Schlechter = Ancistrorhynchus Finet - Evan
Phragmipedilum Rolfe = Phragmopedilum Pfitzer = Phragmipedium Rolfe - C
Phragmipedium Rolfe - C
Phragmorchis L. O. Williams - Evan
Phreatia Lindley - Epod
Phyllomphax Schlechter = Brachycorythis Lindley - Oorc
Phyllorkis Thouars = Bulbophyllum Thouars - Emal
Phymatidium Lindley - Ecym
Physanthera Steudel = Rodriguezia Ruiz & Pavon - Ecym
Physinga Lindley = Epidendrum L. - Eepi
Physoceras Schlechter - Oorc
Physogyne Garay - Ocra
Physosiphon (Lindley) Luer = Stelis Swartz - Eepi
Physothallis (Garay) Luer = Stelis Swartz - Eepi
Physurus Lindley = Erythrodes Blume - Ocra
Pierardia Rafinesque = Dendrobium Swartz - Emal
Pilophyllum Schlechter - Ecoll
Pilumna Lindley = Trichopilia Lindley - Ecym
Pinalia Lindley - Epod
Pinelia Lindley = Homalopetalum Rolfe - Eepi
Pinelianthe Rauschert = Homalopetalum Rolfe - Eepi
Piperia Rydberg = Platanthera Richard - Oorc
Pittierella Schlechter = Cryptocentrum Bentham = Maxillaria Ruiz & Pavon s.l. - Ecym
Pityphyllum Schlechter = Maxillaria Ruiz & Pavon s.l. - Ecym
Placostigma Blume = Podochilus Blume - Epod
Platanthera Richard - Oorc
Platyclinis Bentham = Dendrochilum Blume - Eare
Platycoryne Reichenbach f. - Oorc
Platyglottis L. O. Williams = Scaphyglottis Poeppig & Endlicher - Eepi
Platylepis A. Richard - Ocra
Platyrhiza Barbosa Rodrigues - Ecym
Platysma Blume = Podochilus Blume - Epod
Platystele Schlechter - Eepi
Platystylis Lindley = Liparis Richard - Emal
Platythelys Garay = Aspidogyne Garay - Ocra
Plectoglossa (J. D. Hooker) K. Prased & Venu ?= = Habenaria Willdenow - Oorc
Plectorrhiza Dockrill - Evan
Plectrelminthus Rafinesque - Evan
Plectrophora H. Focke - Ecym
Pleione D. Don - Eare
Pleuranthium (Reichenbach f.) Bentham = Epidendrum L. - Eepi
Pleurobotryium = Acianthera Schiedw. - Eepi
Pleurothallis R. Brown - Eepi
Pleurothallopsis Porto & Brade - Eepi
Plexaure Endlicher = Phreatia Lindley - Epod
Plocoglottis Blume - Ecoll
Poaephyllum Ridley - Epod
Podandriella Szlachetko & Olszewski = Habenaria Willdenow - Oorc
Podandria Rolfe = Habenaria Willdenow - Oorc
Podangis Schlechter - Evan
Podanthera Wight = Epipogium Borkh. - Ener
Podochilus Blume - Epod
Pogonia Jussieu - Vpog
Pogoniopsis Reichenbach f. - Vpog
Polychilos Breda = Phalaenopsis Blume - Evan
Polycycnis Reichenbach f. - Ecym
Polycynopsis Szlachetko = Polycycnis Reichenbach f. - Ecym
Polyotidium Garay - Ecym
Polyradicion Garay = Dendrophylax Reichenbach f. - Evan
Polyrrhiza Pfitzer = Dendrophylax Reichenbach f. - Evan
Polystachya Hooker - Evan
Polystylus Hasskarl = Phalaenopsis Blume - Evan
Polytoma B. A. Gomes = Aerides Loureiro - Evan
Pomatocalpa Breda - Evan
Ponera Lindley - Eepi
Ponerorchis Reichenbach f. - Oorc
Ponthieva R. Brown - Ocra
Porolabium Tang & F. T. Wang = Herminium L. - Oorc
Porpax Lindley - Epod
Porphyrodesme Schlechter = Renanthera Loureiro - Evan
Porphyroglottis Ridley - Ecym
Porphyrostachys Reichenbach f. - Ocra
Porroglossum Schlechter - Eepi
Porrorhachis Garay - Evan
Portillia Königer & Portilla = Masdevallia Ruiz & Pavon - Eepi
Praecoxanthus Hopper & A. P. Brown - Odiu
Prasophyllum R. Brown - Odiu
Preptanthe Reichenbach f. = Calanthe R. Brown s.l. - Ecoll
Prescottia Hooker - Ocra
Pristiglottis Cretz. & J. J. Smith = = Odontochilus Blume - Ocra
Proctoria Luer = Acianthera Schiedw. - Eepi
Promenaea Lindley - Ecym
Prosthechea Knowles & Westcott - Eepi
Protoceras J. Joseph & Vaj. = Pteroceras Hasskarl - Evan
Pseudacoridium Ames = Dendrochilum Blume - Eare
Pseudepidendrum Reichenbach f. = Epidendrum L. - Eepi
Pseuderia Schlechter - Epod
Pseudocentrum Lindley - Ocra
Pseudocranichis Garay - Ocra
Pseudoctomeria Kränzlin = Specklinia Lindley - Eepi
Pseudoeurystyles Hoehne = Eurystyles Wawra - Ocra
Pseudogoodyera Schlechter - Ocra
Pseudolaelia Porto & Brade - Eepi
Pseudoliparis Finet = Crepidium Blume - Emal
Pseudomacodes Rolfe = Macodes (Blume) Lindley - Ocra
Pseudomaxillaria Hoehne = Camaridium Lindley = Maxillaria Ruiz & Pavon s.l. - Ecym
Pseudorchis Gray = Liparis Richard - Emal
Pseudoctameria Kraenzlin = Specklinia Lidley - Eepi
Pseudorchis Séguier - Oorc
Pseudoperstylus (P. F. Hunt) Szlachetko = Habenaria Willdenow - Oorc
Pseudostelis (Schlechter) Luer = Stelis Swartz - Eepi
Pseudovanilla Garay - Vvan
Psilanthemum Stein = Epidendrum L. - Eepi
Psilochilus Barbosa Rodrigues - Etri
Psittaglossum LaLave & Lex. = Camaridium Lindley = Maxillaria Ruiz & Pavon s.l. - Ecym
Psycheilos Breda = Zeuxine Lindley - Ocra
Psychilis Rafinesque - Eepi
Psychopsiella Lückel & Braem = Psychopsis Rafinesque - Ecym
Psychopsis Rafinesque - Ecym
Psygmorchis Dodson & Dressler = Erycina Lindley - Ecym
Pterochilus J. D. Hooker = Crepidium Blume - Emal
Pterichis Lindley - Ocra
Pteroceras Hasskarl - Evan
Pteroglossa Schlechter - Ocra
Pteroglossaspis Reichenbach f. = Eulophia R. Brown - Ecym
Pterostemma Kränzlin - Ecym
Pterostylis R. Brown - Ocra
Pterygodium Swartz - Oorc
Ptilocnema D. Don = Pholidota Lindley - Eare
Ptychogyne Pfitzer = Coelogyne Lindley - Eare
Pygmaeorchis Brade - Eepi
Pyrorchis D. L. Jones & M. A. Clements - Odiu

Quechua Salazar & L. Jost - Ocra
Quekettia Lindley - Ecym
Queteletia Blume = Orchipedium Breda - Ocra
Quisqueya Dod - Eepi

Raciborskanthos Szlachetko = Cleisostoma Blume - Evan
Radinocion Ridley = Aerangis Reichenbach f. - Evan
Ramonia Schlechter = Scaphyglottis Poeppig & Endlicher - Eepi
Rangaeris (Schlechter) Summerhayes - Evan
Rauhiella Pabst & Braga - Ecym
Raycadenco Dodson = Fernandezia Ruiz & Pavon - Ecym
Regalia Luer ?= Masdevallia Ruiz & Pavon - Eepi
Regnellia Barbosa Rodrigues = Bletia Ruiz & Pavon - Eepi
Reichantha Luer ?= Masdevallia Ruiz & Pavon - Eepi
Reichenbachanthus Barbosa Rodrigues = Scaphyglottis Poeppig & Endlicher - Eepi
Renanthera Loureiro - Evan
Renantherella Ridley = Renanthera Loureiro - Evan
Renata Ruschi = Pseudolaelia Porto & Brade - Eepi
Restrepia Kunth - Eepi
Restrepiella Garay & Dunsterville - Eepi
Restrepiopsis Luer = Pleurothallopsis Porto & Brade - Eepi
Reymondia Kuntze = Myoxanthus Poeppig & Endlicher - Eepi
Rhaesteria Summerhayes - Evan
Rhamphidia (Lindley) Lindley = Hetaeria Blume - Ocra
Rhamphorhynchus Garay - Ocra
Rhaphidorhynchus Finet = Aerangis Reichenbach f. - Evan
Rhetinantha M. A. Blanco = Maxillaria Ruiz & Pavon s.l. - Ecym
Rhinerrhiza Rupp - Evan
Rhinerrhizopsis Ormerod - Evan
Rhinocerotidium Szlachetko = Gomesa R. Brown - Ecym
Rhinocidium D. H. Baptista = Gomesa R. Brown - Ecym
Rhiphidoglossum Schlechter - Evan
Rhizanthella R. S. Rogers - Odiu
Rhizocorallon Gagnebin = Corallorrhiza Gagnebin - Eepi
Rhomboda Lindley - Ocra
Rhophalorrhacis Reichenbach f. = Polystachya Hooker - Evan
Rhynchadenia A. Richard = Macradenia R. Brown - Ecym
Rhynchogyna Seidenfaden & Garay - Evan
Rhyncholaelia Schlechter - Eepi
Rhynchopera Klotzsch = Pleurothallis R. Brown - Eepi
Rhyncnopera Szlachetko & Marg. = Pleurothallis R. Brown - Eepi
Rhynchophreatia (Schlechter) Schlechter = Thelasis Blume - Epod
Rhynchostele Reichenbach f. - Ecym
Rhynchostylis Blume - Evan
Rhytionanthos Garay et al. = Bulbophyllum Thouars - Emal
Ridleya (J. D. Hooker) Pfitzer = Thrixspermum Loureiro - Evan
Ridleyella Schlechter - Epod
Rimacola Rupp - Odiu
Risleya King & Pantling - Ecoll
Robiquetia Gaudichaud - Evan
Rodrigoa Braas ?= Masdevallia Ruiz & Pavon - Eepi
Rodriguezia Ruiz & Pavon - Ecym
Rodrigueziella Kuntze = Gomesa R. Brown - Ecym
Rodrigueziopsis Schlechter = Gomesa R. Brown - Ecym
Roeperocharis Reichenbach f. - Oorc
Roezliella Schlechter = Oncidium Swartz - Ecym
Rolfea Zahlb. = Palmorchis Barbosa Rodrigues - Eneo
Rolfiella Schlechter = Benthamia A. Richard - Oorc
Ronaldella Luer = Pabstiella Brieger & Senghas - Eepi
Rossioglossum (Schlechter) Garay & G. C. Kenn. - Ecym
Rubellia (Luer) Luer = Platystele Schlechter - Eepi
Rudolfiella Hoehne - Ecym
Rusbyella Rolfe = Cyrtochilum Kunth - Ecym
Rynchanthera Blume = Corymborkis Thouars - Etro

Saccidium Lindley = Holothrix Lindley - Oorc
Saccochilus Blume = Saccolabium Blume - Evan, or Thrixspermum Loureiro - Evan
Saccoglossum Schlechter = Bulbophyllum Thouars - Emal
Saccolabiopsis J. J. Smith - Evan
Saccolabium Blume - Evan
Sacoila Rafinesque - Ocra
Salacistis Reichenbach f. = Goodyera R. Brown - Ocra
Salpistele Dressler ?= Stelis Swartz - Eepi
Samarorchis Ormerod = Robiquetia Gaudichaud - Evan
Sanderella Kuntze - Ecym
Sansonia Chiron - Eepi
Santanderella P. Ortiz = Notyliopsis P. Ortiz - Ecym
Santotomasia Ormerod - Evan
Sarcanthopsis Garay - Evan
Sarcanthus Lindley (1824) = Acampe Lindley - Evan
Sarcanthus Lindley (1826) = Cleisostoma Blume - Evan
Sarcinula Luer = Specklinia Lindley - Eepi
Sarcocadetia (Schlechter) M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Sarcochilus R. Brown - Evan
Sarcoglottis C. Presl - Ocra
Sarcoglossum Beer = Cirrhaea Lindley - Ecym
Sarcoglyphis Garay - Evan
Sarcophyton Garay - Evan
Sarcopodium Lindley = Dendrobium Swartz - Emal
Sarcorhynchus Schlechter = Rhiphidoglossum Schlechter - Evan
Sarcostoma Blume - Epod
Sarmenticola Senghas & Garay = Macroclinium Barbosa Rodrigues - Ecym
Sarothrochilus Schlechter = Trichoglottis Blume - Evan
Sarracenella (Luer) Luer = Acianthera Schiedw. - Eepi
Satyridium Lindley = Satyrium L. - Oorc
Satyrium L. - Oorc
Saundersia Reichenbach f. - Ecym
Sauroglossum Lindley - Ocra
Saurolophorkis Marg. & Szlachetko = Crepidium Blume - Emal
Sauvetrea Szlachetko = Maxillaria Ruiz & Pavon s.l. - Ecym
Sayeria Kränzl. = Dendrobium Swartz - Emal
Scaphosepalum Pfitzer - Eepi
Scaphyglottis Poeppig & Endlicher - Eepi
Scelochiloides Dodson & M. W. Chase = Comparettia Poeppig & Endlicher - Ecym
Scelochilopsis Dodson & M. W. Chase = Comparettia Poeppig & Endlicher - Ecym
Scelochilus Klotzsch = Comparettia Poeppig & Endlicher - Ecym
Schidorhynchos Szlachetko = Sauroglossum Lindley - Ocra
Schiedeella Schlechter - Ocra
Schistotylus Dockrill - Evan
Schizochilus Sond - Oorc
Schizodium Lindley = Disa P. J. Bergius - Oorc
Schlimmia Planchon & Linden - Ecym
Schueitemania Ormerod - Ocra
Schoenomorphus Gagnepain = Tropidia Lindley - Etro
Schoenorchis Reinwardt - Evan
<> Schomburgkia Lindley = Laelia Lindley - Eepi
Schunkea Senghas - Ecym
Scleropteris Scheidw. = Cirrhaea Lindley - Ecym
Schwartzkopffia Kränzlin = Brachycorythis Lindley - Oorc
Scoliochilus Reichenbach f. = Appendicula Blume - Epod
Scopularis Lindley = Holothrix Lindley - Oorc
Scuticaria Lindley - Ecym
Sedirea Garay & H. Sweet = Phalaenopsis Blume - Evan
Seegeriella Senghas - Ecym
Seidenfadenia Garay - Evan
Seidenfadeniella C. S. Kumar - Evan
Seidenfia Szlachetko = Crepidium Blume - Emal
Selenipedilum Pfitzer = Selenipedium Reichenbach f. - C
Selenipedium Reichenbach f. - C
Senghasia Szlachetko = Kefersteinia Reichenbach f. - Ecym
Sepalosaccus Schlechter = Camaridium Lindley = Maxillaria Ruiz & Pavon s.l. - Ecym
Sepalosiphon Schlechter = Glomera Blume - Eare
Seraphyta Fischer & C. A. Mey. = Epidendrum L. - Eepi
Serapias L. - Oorc
Serpenticaulis M. A. Clements & D. L. Jones = Bulbophyllum Thouars - Emal
Serrastylis Rolfe = Macradenia R. Brown - Ecym
Sertifera Lindley & Reichenbach f. - Esob
Setochilos Breda = Bulbophyllum Thouars - Emal
Siagonanthus Poeppig & Endlicher = Ornithidium R. Brown s. str. = Maxillaria Ruiz & Pavon s.l. - Ecym
Siederella Szlachetko et al. = Cyrtochilum Kunth - Ecym
Sievekingia Reichenbach f. - Ecym
Sigmatochilus Rolfe = Chelonistele Pfitzer - Eare
Sigmatogyne Pfitzer = Panisea Lindley - Eare
Sigmatostalix Reichenbach f. = Oncidium Swartz - Ecym
Silvorchis J. J. Smith - Oorc
Singchia Z. J. Liu & L. J. Chen - Evan
Sinorchis S. C. Chen = Aphyllorchis Blume - Eneo
Sirhookera Kuntze - Evan
Sirindhornia H. A. Pedersen & Suksathan - Oorc
Skeptrostachys Garay - Ocra
Smithorchis T. Tang & F. T. Wang = Platanthera Richard - Oorc
Smithsonia C. J. Saldanha - Evan
Smitinandia Holttum - Evan
Sobennikoffia Schlechter - Evan
Sobralia Ruiz & Pavon - Esob
Sodiroella Schlechter = Telipogon Kunth - Ecym
Solenangis Schlechter - Evan
Solenidiopsis Senghas = Oncidium Swartz - Ecym
Solenidium Lindley - Ecym
Solenipedium Beer = Selenipedium Reichenbach f. - C
Solenocentrum Schlechter - Ocra
Sophronitella Schlechter = Isabelia Barbosa Rodrigues - Eepi
Sophronia Lindley = Cattleya Lindley - Eepi
Sophronitis Lindley = Cattleya Lindley - Eepi
Soterosanthus Jenny - Ecym
Sotoa Salazar - Ocra
Spathiger Small = Epidendrum L. - Eepi
Spathium Stein = Epidendrum L. - Eepi
Spathoglottis Blume - Ecoll
Specklinia Lindley - Eepi
Spectaculum Luer ?= Masdevallia Ruiz & Pavon - Eepi
Sphyrarhynchus Mansfeld - Evan
Sphyrastylis Schlechter = Ornithocephalus Hooker - Ecym
Spiculaea Lindley - Odiu
Spilorchis D. L. Jones & M. A. Clements = Bulbophyllum Thouars - Emal
Spilotantha Luer ?= Masdevallia Ruiz & Pavon - Eepi
Spiranthes Richard - Ocra
Spongiola J. J. Wood & A. L. Lamb - Evan
Stacyella Szlachetko = Erycina Lindley - Ecym
Stalkya Garay - Ocra
Stanhopea Hooker - Ecym
Stanhopeastrum Reichenbach f. = Stanhopea Hooker - Ecym
Stauritis Reichenbach f. = Phalaenopsis Blume - Evan
Staurochilus Ridley = Trichoglottis Blume - Evan
Stauroglottis Schauer = Phalaenopsis Blume - Evan
Stauropsis Reichenbach f. = Trichoglottis Blume - Evan
Stelbophyllum M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Steliopsis Brieger = Stelis Swartz - Eepi
Stelis Swartz - Eepi
Stellilabium Schlechter = Telipogon Kunth - Ecym
Stellorkis Thoars = Nervilia Gaudichaud - Ener
Stenia Lindley - Ecym
Stenocoryne Lindley = Bifrenaria Lindley - Ecym
Stenoglossum Kunth = Epidendrum L. - Eepi
Stenoglottis Lindley - Oorc
Stenopolen Rafinesque = Stenia Lindley - Ecym
Stenoptera C. Presl - Ocra
Stenorrhynchos Sprengel - Ocra
Stenotyla Dressler - Ecym Stephanothelys Garay - Ocra
Stereochilus Lindley - Evan
Stereosandra Blume - Ener
Steveniella Schlechter - Oorc
Stevenorchis Wankow & Kränzlin = Steveniella Schlechter - Oorc
Stichorchis Thouars = Stichorkis Thouars - Emal
Stictophyllorchis Dodson & Carnevali = Quekettia Lindley - Ecym
Stictophyllum Dodson & M. W. Chase = Quekettia Lindley - Ecym
Stigmatodactylus Makino - Odiu
Stigmatorthos M. W. Chase & D. E. Benn. = Comparettia Poeppig & Endlicher - Ecym
Stigmatosema Garay = Cyclopogon C. Presl - Ocra
Stillifolium Königer & Pongratz = Trichocentrum Poeppig & Endlicher - Ecym
Stimegas Rafinesque = Paphiopedilum Pfitzer - C
Stolzia Schlechter - Epod
Strateuma Rafinesque = Zeuxine Lindley - Ocra
Strateuma Salisbury = Orchis L. - Oorc
Streptoura Luer ?= Masdevallia Ruiz & Pavon - Eepi
Sturmia Reichenbach = Liparis Richard - Emal
Styloglossum Breda = Calanthe R. Brown s.l. - Ecoll
Suarezia Dodson - Ecym
Sudamerlycaste Archila - Ecym
Summerhayesia P. J. Cribb - Evan
Sunipia Smith = Bulbophyllum Thouars - Emal
Sutrina Lindley - Ecym
Svenkoeltzia Burns-Balogh - Ocra
Sylphia Luer = Specklinia Lindley - Eepi
Symphyglossum Schlechter = Oncidium Swartz - Ecym
Symphyosepalum Handel-Mazzetti = ?, Oorc
Synadena Rafinesque = Phalaenopsis Blume - Evan
Synanthes Burns-Balogh et al. = Eurystyles Wawra - Ocra
Synarmosepalum Garay et al. = Bulbophyllum Thouars - Emal
Synassa Lindley = Sauroglossum Lindley - Ocra
Synoplectris Rafinesque = Sarcoglottis C. Presl - Ocra
Systeloglossum Schlechter - Ecym
Szlachetkoella Mytnik = Polystachya Hooker - Evan

Taddeastrum Szlachetko = Stanhopea Hooker - Ecym
Taeniophyllum Blume - Evan
Taeniorrhiza Summerhayes - Evan
Tainia Blume - Ecoll
Takulumena Szlachetko = Epidendrum L. - Eepi
Talpinaria H. Karstens = Pleurothallis R. Brown - Eepi
Tamayorkis Szlachetko - Emal
Tankervillea Link = Phaius Loureiro = Calanthe R. Brown s.l. - Ecoll
Tapeinoglossum Schlechter = Bulbophyllum Thouars - Emal
Taprobanea Christenson - Evan
Taurostalix Reichenbach f. = Bulbophyllum Thouars - Emal
Teagueia (Luer) Luer - Eepi
Telipogon Kunth - Ecym
Tetrabaculum M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Tetragamestus Reichenbach f. = Scaphyglottis Poeppig & Endlicher - Eepi
Tetramicra Lindley - Eepi
Tetrapeltis Lindley = Otochilus Lindley - Eare
Tetrodon (Kränzl.) M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Teuscheria Garay - Ecym
Thaia Seidenfaden - Etha
Theana Aver. = Grosourdya Reichenbach f. - Evan
Thecopus Seidenfaden - Ecym
Thecostele Reichenbach f. - Ecym
Thelasis Blume - Epod
Thelymitra J. R. Forster & G. Forster - Odiu
Thelypogon Sprengel = Telipogon Kunth - Ecym
Thelyschista Garay - Ocra
Theodorea Barbosa Rodrigues = Gomesa R. Brown - Ecym
Thicuania Rafinesque = Dendrobium Swartz - Emal
Thiebautia Colla = Bletia Ruiz & Pavon - Eepi
Thorvaldsenia Hartm. = Chysis Lindley - Eepi
Thrixspermum Loureiro - Evan
Thulinia P. J. Cribb - Oorc
Thunia Reichenbach f. - Eare
Thylacoglossum (Sclechter) Brieger = Glomera Blume - Eare
Thylacis Gagnepain = Thrixspermum Loureiro - Evan
Thysanoglossa Porto & Brade - Ecym
Ticoglossum Halb. = Rossioglossum (Schlechter) Garay & G. C. Kenn. - Ecym
Tigivesta Luer = Pleurothallis R. Brown - Eepi
Tinaea Vis. = Tinea Biv. = Neotinea Reichenbach f. - Oorc
Tipularia Nuttall - Eepi
Titania Endlicher = Oberonia Lindley - Emal
Todaroa A. Richard & Galeotti = Campylocentrum Bentham - Evan
Tolumnia Rafinesque - Ecym
Tomotris Rafinesque = Corymborkis Thouars - Etro
Tomzanonia Nir - Eepi
Townsonia Cheeseman - Odiu
Trachelosiphon Schlechter = Eurystyles Wawra - Ocra
Trachoma Garay - Evan
Trachyrhachis (Schlechter) Szlachetko = Bulbophyllum Thouars - Emal
Trachyrhiza (Schlechter) Brieger = Dendrobium Swartz - Emal
Traunsteinera Reichenbach - Oorc
Trevoria F. Lehm. - Ecym
Triaristella Luer = Trisetella Luer - Eepi
Triaristellina Rauschert = Trisetella Luer - Eepi
Trias Lindley = Bulbophyllum Thouars - Emal
Tribrachia Lindley = Bulbophyllum Thouars - Emal
Tribulago Luer = Specklinia Lindley - Eepi
Triceratorhynchus Summerhayes - Evan
Triceratorostris (Szlachetko) Szlachetko = Deiregyne Schlechter - Ocra
Trichocentrum Poeppig & Endlicher - Ecym
Trichoceros Kunth - Ecym
Trichochilus Ames = Dipodium R. Brown - Ecym
Trichoglottis Blume - Evan
Trichopilia Lindley - Ecym
Trichorhiza Steudel = Luisia Gaudichaud - Evan
Trichosalpinx Luer = ? - Eepi
Trichosma Lindley = Eria Lindley - Epod
Trichotosia Blume - Epod
Tridachne Lindley & Paxton = Notylia Lindley - Ecym
Tridactyle Schlechter - Evan
Tridelta Luer = Specklinia Lindley - Eepi
Trigonanthe (Schlechter) Brieger = Dryadella Luer - Eepi
Trigonidium Lindley = Maxillaria Ruiz & Pavon s.l. - Ecym
Triorchis Nieuwl. = Spiranthes Richard - Ocra
Triotosiphon Luer ?= Masdevallia Ruiz & Pavon - Eepi
Triphora Nuttall - Etri
Tripleura Lindley = Zeuxine Lindley - Ocra
Tripnudianthes (Seidenfaden) Szlachetko & Kras = Bulbophyllum Thouars - Emal
Trisetella Luer - Eepi
Tritelanthe Rafinesque = Epidendrum L. - Eepi
Trizeuxis Lindley - Ecym
Trophianthus Scheidw. = Aspasia Salisbury - Ecym
Tropidia Lindley - Etro
Tropilis Rafinesque = Dendrobium Swartz - Emal
Trudelia Garay = Vanda R. Brown - Evan
Tryphia Lindley = Holothrix Lindley - Oorc
Tsaiorchis T. Tang & F. T. Wang - Oorc
Tsiorchis Z. J. Liu = Holcoglossum Schlechter - Evan
Tuberolabium Yamam. - Evan
Tubilabium J. J. Smith = Myrmechis (Lindley) Blume - Ocra
Tulotis Rafinesque = Platanthera Richard - Oorc
Tussacia Desvaux = Spiranthes Richard - Ocra
Tussaca Rafinesque = Goodyera R. Brown - Ocra
Tylostigma Schlechter - Oorc
Tylostylis Blume = Callostylis Blume - Epod

Ulantha Hooker = Chloraea Lindley - Ocra
Uleiorchis Hoehne - Egas
Uncifera Lindley - Evan
Unciferia (Luer) Luer = Stelis Swartz - Eepi
Unguella = Acianthera Schiedw. - Eepi
Unguiculabia Mytnik & Szlachetko = Polystachya Hooker - Evan
Uropedilum Pfitzer = Uropedium Lindley = Phragmipedium Rolfe - C
Urostachya (Lindley) Brieger = Pinalia Lindley - Epod

Vanda R. Brown - Evan
Vandopsis Pfitzer - Evan
Vanilla Miller - Vvan
Vanillophorum Necker = Vanilla Miller - Vvan
Vargasiella C. Schweinfurth - Ecym
Vappodes M. A. Clements & D. L. Jones = Dendrobium Swartz - Emal
Vasqueziella Dodson - Ecym
Ventricularia Garay = Trichoglottis Blume - Evan
Verapazia Archita = Specklinia Lindley - Eepi
Vermuelenia A. Löve & D. Löve = Anacamptis Richard - Oorc
Vesicisepalum Garay et al. = Bulbophyllum Thouars - Emal
Vestigium Luer = ?
Veyretelia Szlachetko & Olszewski - Oorc
Veyretia Szlachetko - Ocra
Vexillabium Maekawa = Kuhlhasseltia J. J. Smith - Ocra
Vietorchis Aver. & Averyanova = Silvorchis J. J. Smith - Oorc
Vitekorchis Romowicz & Szlachetko - Ecym
Vonroemeria J. J. Smith = Octarrhena Thwaites - Epod
Vrydagzynea Blume - Ocra

Wailesia Lindley = Dipodium R. Brown - Ecym
Waireia D. L. Jones et al. - Odiu
Wallnoeferia Szlachetko = Helonoma Garay - Ocra
Waluewa Regel = Gomesa R. Brown - Ecym
Warczewiczella Reichenbach f. - Ecym
Warczewitzia Lindley = Clowesia Lindley - Ecym
Warscaea Szlachetko = Cyclopogon C. Presl - Ocra
Warmingia Reichenbach f. - Ecym
Warrea Lindley - Ecym
Warreella Schlechter - Ecym
Warreopsis Garay - Ecym
Winika M. A. Clements et al. = Dendrobium Swartz - Emal
Wullschlaegelia Reichenbach f. - Ewul

Xaritonia Rafinesque = Tolumnia Rafinesque - Ecym
Xeilyanthum Rafinesque = Oncidium Swartz - Ecym
Xenikophyton Garay = Schoenorchis Reinwardt - Evan
Xenosia Luer = ?
Xerorchis Schlechter - Exer
Xiphizusa Reichenbach f. = Bulbophyllum Thouars - Emal
Xiphosion Griffith = Cryptochilus Wallich - Epod
Xylobium Lindley - Ecym

Yoania Maximowicz - Eepi
Yolanda Hoehne = Brachionidium Lindley - Eepi
Ypsilopus Summerhayes - Evan

Zahleria Luer ?= Masdevallia Ruiz & Pavon - Eepi
Zeduba Meissner = Calanthe R. Brown - Ecoll
Zelenkoa M. W. Chase & N. H. Williams - Ecym
Zetagyne Ridley = Panisea Lindley - Eare
Zeuxine Lindley - Ocra
Zeuxinella Aver. - Ocra
Zhukowskia Szlachetko et al. = Sarcoglottis C. Presl - Ocra
Zoophora Bernh. = Orchis L. - Oorc
Zootrophion Luer - Eepi
Zosterophyllanthos Szlachetko & Marg. = Pleurothallis R. Brown - Eepi
Zosterostylis Blume = Cryptostylis R. Brown - Odiu
Zygoglossum Reinwardt = Bulbophyllum Thouars - Emal
Zygopetalon Hooker = Zygopetalum Hooker - Ecym
Zygosepalum (Reichenbach f.) Reichenbach f. - Ecym
Zygostates Lindley - Ecym

Genera largely from Chase et al. (2015), synonymy from Pridgeon et al. (1999, 2001a, 2003, 2005, 2009, 2014); in Epidendroideae-Cymbidieae-Maxillariinae many more genera are recognized in Pridgeon et al. (2009) than in Chase et al. (2015).