Phaius baolocensis sp. nov. (Orchidaceae), a new species endemic to the southern highlands of Vietnam

A new endemic species, Phaius baolocensis N.V.Duy, T.Chen & D.X.Zhang, sp. nov. is described and illustrated. This new entity is similar to Phaius tankervilleae (Banks ex L’Hér.) Blume and P. australis var. bernaysii (F. Muller ex Bernays) Nicholls morphologically, from which it differs in having flowers rachis sparsely, lateral sepal narrow elliptic, petal narrow elliptic, lip apex bilobated, spur subcylindric and short.