Tainiopsis (Tin)
Takakiara (Tak) = Lycaste x Pabstia x Zygopetalum
Tanara (Tanara) = Aerides x Ascocentrum x Renanthera x Rhynchostylis x Vanda
Telidezia (Tdz) = Fernandezia x Telipogon
Telipogon (Tp)
Telisterella (Tlt) = Hofmeisterella x Telipogon
Teohara (Thra) = Arachnis x Renanthera x Vanda x Vandopsis
Tetracattleya (Ttct) = Cattleya x Tetramicra
Tetrakeria (Ttka) = Barkeria x Tetramicra
Tetraliopsis (Ttps) = Laeliopsis x Tetramicra
Tetrallia (Ttr) = Dockrillia x Tetrabaculum
Tetramicra (Ttma)
Tetrarthron (Ttt) = Caularthron x Tetramicra
Tetratonia (Tttna) = Broughtonia x Tetramicra
Thelybaculum (Tlb) = Tetrabaculum x Thelychiton
Thelymitra (Thel)
Thelyrillia (Tyr) = Dockrillia x Thelychiton
Thesaera (Thsra) = Aerangis x Aeranthes
Thompsonara (Thmpa) = Catasetum x Cymbidium x Grammatophyllum
Thrixspermum (Tx)
Thunia (Thu)
Toladenia (Tld) = Macradenia x Tolumnia
Tolassia (Tos)
Tolassia (Tos) = Brassia x Tolumnia
Tolguezettia (Tgz) = Comparettia x Rodriguezia x Tolumnia
Toloncettia (Tnc) = Comparettia x Oncidium x Tolumnia
Toluandra (Tln) = Galeandra x Tolumnia
Tolucentrum (Tun) = Tolumnia x Trichocentrum
Toluglossum (Tgl) = Odontoglossum x Tolumnia
Tolumnia (Tolu)
Tolumnopsis (Tmp) = Tolumnia x Miltoniopsis
Tolutonia (Tut) = Miltonia x Tolumnia
Tomoderara (Tod) = Esmeralda x Paraphalaenopsis x Renanthera x Vanda x Vandopsis
Trachypetalum (Trp)
Traunsteinera (T)
Trautara (Trta) = Doritis x Luisia x Phalaenopsis
Trevorara (Trev) = Arachnis x Phalaenopsis x Vanda
Triaspetalum (Tspt) = Cirrhopetalum x Trias
Triasphyllum (Tphm) = Bulbophyllum x Trias
Trichassia (Tss) = Brassia x Trichocentrum
Trichocenilus (Tcn) = Leochilus x Trichocentrum
Trichocensiella (Ths) = Psychopsiella x Trichocentrum
Trichocentrum (Trt)
Trichoceros (Tc)
Trichocidium (Trcdm) = Oncidium x Trichocentrum
Trichoglottis (Trgl)
Trichonopsis (Trnps) = Phalaenopsis x Trichoglottis
Trichopilia (Trpla)
Trichopogon (Tpgn) = Telipogon x Trichoceros
Trichopsis (Trcps) = Trichoglottis x Vandopsis
Trichostylis (Trst) = Rhynchostylis x Trichoglottis
Trichovanda (Trcv) = Trichoglottis x Vanda
Tridactyle (Tr)
Trigolyca (Trgca) = Mormolyca x Trigonidium
Trigonidium (Trgdm)
Triodoncidium (Tcd) = Odontoglossum x Oncidium x Trichocentrum
Trisuloara (Tsla) = Barkeria x Brassavola x Cattleya x Epidendrum x Laelia x Sophronitis
Tubaecum (Tbcm) = Angraecum x Tuberolabium
Tuberolabium (Tblm)
Tuckerara (Tuck) = Cattleya x Diacrium x Epidendrum
Turnbowara (Tbwa) = Barkeria x Broughtonia x Cattleya