The Two Lobed Lepanthes 
Thelymitra latifolia 
Thin asphodeline 
Thin Pseudobulbed Oncidium 
Thompson's yucca 
Threadlike Eria 
Three-cornered leek 
Three-leaved False Solomon’s Seal 
Three-Leaved Hyacinth 
Three-toothed orchid 
Tiger orchid 
Tiger Orchid 
Tiny mosquito orchid 
Tiny Psygmorchis 
Tiny Star 
Tiny sun orchid 
Tongue-orchid 
Torrey's Craglily 
Tough-leaved iris 
Tracys Cymbidium 
Traunsteinera sphaerica 
Trichocentrum pumilum 
Trichopilia fragrans 
Trichopilia hennisiana