giganteum (Leaney) Peter B.Adams - blotched tree spider orchid Dendrobium tetragonum subsp. melaleucaphilum (D.L.Jones & M.A.Clem.) Dockrill – flared tree spider orchid Dendrobium tetragonum subsp. serpentis Peter B.Adams Dendrobium tetragonum subsp. tetragonum - banded tree spider orchid Dendrobium tetralobatum (P.O'Byrne & J.J.Verm.) Schuit. & Peter B.Adams Dendrobium tetralobum Schltr. Dendrobium textile J.J.Sm. Dendrobium textile var. haematostictum (P.O'Byrne & J.J.Verm.) Schuit. & Peter B.Adams Dendrobium textile var. textile Dendrobium thinii Aver. Dendrobium thyrsiflorum B.S.Williams Dendrobium thyrsiflorum var. minutiflorum Aver. Dendrobium thyrsiflorum var. thyrsiflorum Dendrobium thyrsodes Rchb.f. Dendrobium thysanophorum Schltr. Dendrobium tiongii Cootes Dendrobium tipula J.J.Sm. Dendrobium tipuliferum Rchb.f. Dendrobium tobaense J.J.Wood & J.B.Comber Dendrobium tokai Rchb.f. Dendrobium tomaniense J.J.Wood Dendrobium toppiorum A.L.Lamb & J.J.Wood Dendrobium toppiorum subsp. taitayorum (P.O'Byrne Dendrobium toppiorum subsp. toppiorum Dendrobium torajaense P.O'Byrne Dendrobium toressae (F.M.Bailey) Dockrill – sparkle orchid, mica orchid Dendrobium torquisepalum Kraenzl. Dendrobium torricellense Schltr. Dendrobium tortile Lindl. Dendrobium tortitepalum J.J.Sm. Dendrobium toxopei J.J.Sm. Dendrobium tozerense Lavarack – white gemini orchid Dendrobium trachythece Schltr. Dendrobium trankimianum T.Yukawa Dendrobium transparens Wall. ex Lindl. Dendrobium transtilliferum J.J.Sm. Dendrobium transversilobum J.J.Sm. Dendrobium treacherianum Rchb.f. ex Hook.f. Dendrobium treubii J.J.Sm. Dendrobium treutleri (Hook.f.) Schuit. & Peter B.Adams Dendrobium triangulum J.J.Sm. Dendrobium tricallosum Ames & C.Schweinf. Dendrobium trichosepalum Gilli Dendrobium trichostomum Rchb.f. ex Oliv. Dendrobium tricristatum Schuit. & Peter B.Adams Dendrobium tricuspe (Blume) Lindl. Dendrobium tridentatum Ames & C.Schweinf. Dendrobium tridentiferum Lindl. Dendrobium triflorum (Blume) Lindl. Dendrobium trifurcatum (Carr) Schuit. & Peter B.Adams Dendrobium trigonellodorum Kraenzl. Dendrobium trigonopus Rchb.f. Dendrobium trilamellatum J.J.Sm. – fragrant tea tree orchid, large tea tree orchid Dendrobium trilobulatum Kores Dendrobium trinervium Ridl. Dendrobium triquetrum Ridl. Dendrobium triste Schltr. Dendrobium tropaeoliflorum Hook.f. Dendrobium tropidophorum Schltr. Dendrobium trullatum J.J.Wood & A.L.Lamb Dendrobium truncatum Lindl. Dendrobium truncicola Schltr. Dendrobium tsangianum (Ormerod) Schuit. & Peter B.Adams Dendrobium tsii Schuit. & Peter B.Adams Dendrobium tuberculatum J.J.Sm. Dendrobium tubiflorum J.J.Sm. Dendrobium tuensangense Odyuo & C.Deori Dendrobium tunense J.J.Sm. U Dendrobium uliginosum J.J.Sm. Dendrobium umbellatum (Gaudich.) Rchb.f. Dendrobium umbonatum Seidenf. Dendrobium uncatum Lindl. Dendrobium uncipes J.J.Sm. Dendrobium undatialatum Schltr. Dendrobium unibulbe (Seidenf.) Schuit. & Peter B.Adams Dendrobium unicarinatum Kores Dendrobium unicorne Ames Dendrobium unicum Seidenf. Dendrobium uniflorum Griff. Dendrobium × usitae T.Yukawa Dendrobium usterii Schltr. Dendrobium usterioides Ames Dendrobium ustulatum Carr Dendrobium utile J.J.Sm. V Dendrobium vagabundum A.D.Hawkes & A.H.Heller Dendrobium vagans Schltr. Dendrobium validicolle J.J.Sm. Dendrobium vanderwateri Ridl. Dendrobium vandifolium Finet Dendrobium vandoides Schltr. Dendrobium vanhulstijnii J.J.Sm. Dendrobium vanilliodorum J.J.Sm. Dendrobium vanleeuwenii J.J.Sm. Dendrobium vannouhuysii J.J.Sm. Dendrobium vannouhuysii var. rhombipetalum J.J.Sm.