Dactylodenia (Dtd) = Dactylorhiza x Gymnadenia
Dactylorhiza (Dact)
Danhatchia (Dnh)
Darwinara (Dar) = Ascocentrum x Neofinetia x Rhynchostylis x Vanda
Davidsonara (Dvd) = Brassavola x Cattleya x Laelia x Prosthechea
Debruyneara (Dbra) = Ascocentrum x Luisia x Vanda
Degarmoara (Dgmra) = Brassia x Miltonia x Odontoglossum
Deiselara (Dsla) = Laelia x Schomburgkia x Sophronitis
Dekensara (Dek) = Brassavola x Cattleya x Schomburgkia
Dendrobium (Den)
Dendrogeria (Denga) = Dendrobium x Flickingeria
Dendrophylax (Dlax)
Derosaara (Droa) = Aspasia x Brassia x Miltonia x Odontoglossum
Devereauxara (Dvra) = Ascocentrum x Phalaenopsis x Vanda
Diabroughtonia (Diab) = Broughtonia x Diacrium
Diacattleya (Diaca) = Cattleya x Diacrium
Diakeria (Dkra) = Barkeria x Diacrium
Dialaelia (Dial) = Diacrium x Laelia
Dialaeliocattleya (Dialc) = Cattleya x Diacrium x Laelia
Dialaeliopsis (Dialps) = Diacrium x Laeliopsis
Diaphanangis (Dpgs) = Aerangis x Diaphananthe
Diaphananthe (Dpthe)
Dichromanthus (Dmts)
Dillonara (Dill) = Epidendrum x Laelia x Schomburgkia
Dimerandra (Dmd)
Dinema (Din)
Diodonopsis (Ddo)
Diplonopsis (Dpnps) = Diploprora x Phalaenopsis
Diploprora (Dpra)
Disa (Disa)
Diuris (Diuris)
Dixuanara (Dix) = Aerides x Arachnis x Ascocentrum x Paraphalaenopsis
Docjonesia (Djn) = Davejonesia x Dockrillia
Domindesmia (Ddma) = Domingoa x Hexadesmia
Domingoa (Dga)
Domintonia (Dmtna) = Broughtonia x Domingoa
Dominyara (Dmya) = Ascocentrum x Luisia x Neofinetia x Rhynchostylis
Domliopsis (Dmlps) = Domingoa x Laeliopsis
Doncollinara (Dclna) = Cochlioda x Odontoglossum x Rodriguezia
Dorandopsis (Ddps) = Doritis x Vandopsis
Doredirea (Drd) = Doritis x Sedirea
Doreenhuntara (Dhta) = Bollea x Cochleanthes x Kefersteinia x Pescatoria
Doricentrum (Dctm) = Ascocentrum x Doritis
Doriella (Drlla) = Doritis x Kingiella
Doriellaopsis (Dllps) = Doritis x Kingiella x Phalaenopsis
Dorifinetia (Dfta) = Doritis x Neofinetia
Doriglossum (Drgm) = Ascoglossum x Doritis
Dorisia (Drsa) = Doritis x Luisia
Doristylis (Dst) = Doritis x Rhynchostylis
Doritaenopsis (Dtps) = Doritis x Phalaenopsis
Doritis (Dor)
Dorthera (Dtha) = Doritis x Renanthera
Dossinia (Doss)
Dossinimaria (Dsma) = Dossinia x Haemaria
Dossinochilus (Dsh) = Anoectochilus x Dossinia
Dossinyera (Dny) = Dossinia x Goodyera
Dossisia (Dsi) = Dossinia x Ludisia
Downsara (Dwsa) = Aganisia x Batemannia x Otostylis x Zygosepalum
Dracula (Drac)
Dracuvallia (Drvla) = Dracula x Masdevallia
Dresslerara (Dres) = Ascoglossum x Phalaenopsis x Renanthera
Dressleria (Dre)
Drymoanthus (Dry)
Duggerara (Dugg) = Ada x Brassia x Miltonia
Dunnara (Dnna) = Broughtonia x Cattleyopsis x Domingoa
Dunningara (Dngra) = Aspasia x Miltonia x Oncidium
Durutyara (Dtya) = Batemannia x Otostylis x Zygopetalum x Zygosepalum
Dyakia (Dy)