New taxa of tribe Gastrodieae (Epidendroideae, Orchidaceae) from Yunnan, China and its conservation implication.

, a new species of Orchidaceae from Yunnan Province, China, is described and illustrated. It is morphologically similar to , but can be easily distinguished from the latter by having a rhombic epichile, long column (6.0-7.5 mm long), and a needle-shaped appendage (1.8-3.2 mm in length) at the base of the stigma. Identification key and colour photographs are provided. A preliminary risk-of-extinction assessment, according to the IUCN Red List Categories and Criteria, is given for the new species. The plastome of is 30464 bp in length with GC content approximately 24.8%, and the plastome does not contain some housekeeping genes, such as K, , or all photosynthesis genes. In addition, the plastome lacks an IR region. This indicates that the plastome is in the last stage of degradation.