Phalaenopsismedogensis (Orchidaceae, Epidendroideae, Vandeae), a new species from Xizang, China.

A new species of Orchidaceae, Phalaenopsismedogensis , from Motuo, Xizang, is described and illustrated based on morphological characters and molecular phylogenetics analysis. Molecular phylogenetic analysis and morphological characters indicate that P.medogensis is close to P.deliciosa , P.gibbosa and P.lobbii , but differs from them by having triangular wings on the column foot, rhombic lip mid-lobe with a fleshy-horned appendage at the base, and concave lip lateral lobes, the lower part white with a deep purplish-red spot and hairy, the upper part pale yellow with dense rust spots.