Traunsteinera sphaerica 
Trichocentrum pumilum 
Trichopilia fragrans 
Trichopilia hennisiana 
Trichopilia suavis 
Trichosalpinx chamaelepanthes 
Trichosalpinx orbicularis 
Trichosalpinx spathulata 
Trichosalpinx uvaria 
Trigonidium egertonianum 
Trim Sun Orchid 
Trizeuxis 
Tropidia saprophytica 
Tuberous Grass Pink 
Twisted Restrepia 
Two Callous Pleurothallis 
Two Horned Rudolfiella 
Undivided Dendrobium 
Unscented dendrobium 
Upright spider orchid 
Vanda ampullacea 
Vanda denisoniana 
Vanda perplexa 
Vanilla madagascariensis