Dendrobium attenuatum Lindl. Dendrobium aurantiflammeum J.J.Wood Dendrobium aurantiiroseum P.Royen ex T.M.Reeve Dendrobium aureicolor J.J.Sm. Dendrobium aureilobum J.J.Sm. Dendrobium auriculatum Ames & Quisumb. Dendrobium austrocaledonicum Schltr. Dendrobium awormangae Ormerod Dendrobium axillare Schltr. Dendrobium ayubii J.B.Comber & J.J.Wood Dendrobium azureum Schuit. B Dendrobium babiense J.J.Sm. Dendrobium baeuerlenii F.Muell. & Kraenzl. Dendrobium baileyi F.Muell. – blotched gemini orchid Dendrobium bakoense J.J.Wood Dendrobium balzerianum Fessel & Lückel Dendrobium bambusiforme Schltr. Dendrobium bambusinum Ridl. Dendrobium bancanum J.J.Sm. Dendrobium bandaense Schltr. Dendrobium banghamii Ames & C.Schweinf. Dendrobium baoernianum P.O'Byrne, P.T.Ong & J.J.Wood Dendrobium barbatulum Schltr. Dendrobium barbatum Breda Dendrobium bariense J.J.Sm. Dendrobium barioense J.J.Wood Dendrobium basilanense Ames Dendrobium beamanianum J.J.Wood & A.L.Lamb Dendrobium begaudii (Cavestro) Schuit. & Peter B.Adams Dendrobium beleense Ormerod Dendrobium bellatulum Rolfe Dendrobium bensoniae Rchb.f. – Benson's dendrobium Dendrobium bialatum J.J.Sm. Dendrobium bicameratum Lindl. Dendrobium bicarinatum Ames & C.Schweinf. Dendrobium bicaudatum Reinw. ex Lindl. Dendrobium bicolense Lubag-Arquiza Dendrobium biconvexum (D.L.Jones & M.A.Clem.) J.M.H.Shaw – Mount Windsor rock orchid, Dendrobium bicostatum J.J.Sm. Dendrobium bicristatum Ormerod Dendrobium bidentiferum J.J.Sm. Dendrobium bifalce Lindl. – native bee orchid Dendrobium biflorum (G.Forst.) Sw. Dendrobium bifurcatum T.Yukawa Dendrobium bigibbum Lindl. Dendrobium bigibbum var. bigibbum – mauve butterfly orchid Dendrobium bigibbum var. compactum (C.T.White) Peter B.Adams Dendrobium bigibbum var. schroederianum (Rchb.f. ex W.Watson) Peter B.Adams Dendrobium bigibbum var. superbum (Rchb.f. – Cooktown orchid Dendrobium bihamulatum J.J.Sm. Dendrobium bilobulatum Seidenf. Dendrobium bilobum Lindl. Dendrobium biloculare J.J.Sm. Dendrobium bismarckiense Schltr. Dendrobium blanche-amesiae A.D.Hawkes & A.H.Heller Dendrobium blaoense Schuit. & Peter B.Adams Dendrobium blumei Lindl. Dendrobium bobolei Ormerod Dendrobium boosii Coates & W.Suarez Dendrobium boridiense Ormerod Dendrobium bostrychodes Rchb.f. Dendrobium bowmanii Benth. – straggly pencil orchid Dendrobium brachyanthum Schltr. Dendrobium brachycalyptra Schltr. Dendrobium brachycentrum Ridl. Dendrobium brachypus (Endl.) Rchb.f. – Norfolk Island orchid Dendrobium brachythecum F.Muell. & Kraenzl. Dendrobium bracteosum Rchb.f. Dendrobium braianense Gagnep. Dendrobium branderhorstii J.J.Sm. Dendrobium brassii T.M.Reeve & P.Woods Dendrobium brevibulbum J.J.Sm. Dendrobium brevicaudum D.L.Jones & M.A.Clem. – Mount Finnigan pencil orchid, Dendrobium brevicaule Rolfe Dendrobium brevicaule subsp. brevicaule Dendrobium brevicaule subsp. calcarium (J.J.Sm.) T.M.Reeve & P.Woods Dendrobium brevicaule ssp. pentagonum (Kraenzl.) T.M.Reeve & P.Woods Dendrobium brevicolle J.J.Sm. Dendrobium brevilabium Schltr. Dendrobium brevimentum Seidenf. Dendrobium brillianum Ormerod & Cavestro Dendrobium brinkmanii Ormerod Dendrobium brunnescens Schltr. Dendrobium brunneum Schuit. & Peter B.Adams Dendrobium brymerianum Rchb.f. Dendrobium buffumii A.D.Hawkes Dendrobium bukidnonense Ames & Quisumb. Dendrobium bulbophylloides Schltr. Dendrobium bullenianum Rchb.f. Dendrobium bunuanense Ames Dendrobium burkeanum Ormerod Dendrobium busuangense Ames Dendrobium butchcamposii Cootes, M.Leon & R.Boos C Dendrobium cabadharense Ames Dendrobium cacuminis Gagnep.