Dendrobium purpureum ssp. purpureum Dendrobium putnamii A.D.Hawkes & A.H.Heller Dendrobium pycnostachyum Lindl. Q Dendrobium quadriferum Schltr. Dendrobium quadrilobatum Carr Dendrobium quadrilobum Rolfe Dendrobium quadriquetrum J.J.Sm. Dendrobium quinqhecallosum J.J.Sm. Dendrobium quinquecaudatum J.J.Sm. Dendrobium quinquedentatum J.J.Sm. Dendrobium quinquelobatum Schltr. Dendrobium quinquelobum (Schltr.) J.J.Sm. Dendrobium quisumbingii A.D.Hawkes & A.H.Heller R Dendrobium racemosum (Nicholls) Clemesha & Dockrill – erect pencil orchid Dendrobium rachmatii J.J.Sm. Dendrobium racieanum Cavestro Dendrobium radians Rchb.f. Dendrobium radiatum (D.L.Jones & M.A.Clem.) J.M.H.Shaw – brushbox feather orchid Dendrobium radicosum Ridl. Dendrobium ramificans J.J.Sm. Dendrobium ramosii Ames Dendrobium rantii J.J.Sm. Dendrobium rappardii J.J.Sm. Dendrobium rariflorum J.J.Sm. Dendrobium rarum Schltr. Dendrobium rarum var. miscegeneum Dauncey Dendrobium rarum var. pelorium Dauncey Dendrobium ravanii Cootes Dendrobium rechingerorum Schltr. Dendrobium reconditum Schuit. & Peter B.Adams – closed burr orchid Dendrobium recurvatum (Blume) J.J.Sm. Dendrobium recurvifolium J.J.Sm. Dendrobium recurvilabre J.J.Sm. Dendrobium reflexitepalum J.J.Sm. Dendrobium reflexum Schuit. & de Vogel Dendrobium refractum Teijsm. & Binn. Dendrobium regale Schltr. Dendrobium regale var. euanthum Schltr. Dendrobium regale var. regale Dendrobium reginanivis P.O'Byrne & J.J.Verm Dendrobium regium Prain Dendrobium reineckei Schltr. Dendrobium remotisepalum J.J.Sm. Dendrobium reniforme J.J.Sm. Dendrobium rennellii P.J.Cribb Dendrobium repandum Schuit. & de Vogel Dendrobium restrepioides (W.Suarez & M.A.Clem.) J.M.H.Shaw Dendrobium revolutum Lindl. Dendrobium reypimentelli Cootes Dendrobium rhabdoglossum Schltr. Dendrobium rhipidolobum Schltr. Dendrobium rhodobalion Schltr. Dendrobium rhodocentrum Rchb.f. Dendrobium rhodochilum (Ferreras & Cootes) Schuit. & Peter B.Adams Dendrobium rhodostele Ridl. Dendrobium rhodostictum F.Muell. & Kraenzl. Dendrobium rhombeum Lindl. Dendrobium rhombopetalum Kraenzl. Dendrobium rhytidothece Schltr. Dendrobium rickscottianum P.O'Byrne & J.J.Verm Dendrobium ridleyanum Schltr. Dendrobium rigidifolium Rolfe Dendrobium rigidum R.Br. – smooth tongue orchid, smooth tick orchid Dendrobium rindjaniense J.J.Sm. Dendrobium riparium J.J.Sm. Dendrobium ritaeanum King & Pantl. Dendrobium roseatum Ridl. Dendrobium roseicolor A.D.Hawkes & A.H.Heller Dendrobium roseiodorum Sathap., T.Yukawa & Seelanan Dendrobium roseipes Schltr. Dendrobium rosellum Ridl. Dendrobium roseoflavidum Schltr. Dendrobium roseonervatum Schltr. Dendrobium roseosparsum P.O'Byrne & J.J.Verm Dendrobium roseostriatum Ridl. Dendrobium rotundatum (Lindl.) Hook.f. Dendrobium rubropictum Schltr. Dendrobium ruckeri Lindl. Dendrobium ruginosum Ames Dendrobium rugosum (Blume) Lindl. Dendrobium rugulosum J.J.Sm. Dendrobium rumphiae Rchb.f. Dendrobium rupestre J.J.Sm. Dendrobium rupicola Ridl. Dendrobium rupicoloides J.M.H.Shaw – northern rock orchid Dendrobium × ruppiosum Clemesha Dendrobium rutriferum Rchb.f. Dendrobium ruttenii J.J.Sm. S Dendrobium sabahense J.J.Wood Dendrobium sacculiferum J.J.Sm. Dendrobium sagittatum J.J.Sm. Dendrobium salaccense (Blume) Lindl. Dendrobium salicifolium J.J.Sm. Dendrobium salomonense Schltr. Dendrobium sambasanum J.J.Sm. Dendrobium samoense P.J.Cribb Dendrobium sancristobalense P.J.Cribb Dendrobium sanderae Rolfe Dendrobium sandsii J.J.Wood & C.L.Chan Dendrobium sanguinolentum Lindl. Dendrobium sanseiense Hayata Dendrobium sarawakense Merr. Dendrobium sarcochilus Finet Dendrobium sarcochilus var. megalorhizum