Hemipiliazhuxiensis (Orchideae, Orchidaceae), a new species from Hubei Province, China

Hemipiliazhuxiensis (Orchidaceae), is a new species discovered in the Shibali Long Canyon National Nature Reserve, Zhuxi County, Hubei Province, China. It is morphologically similar to Hemipiliahenryi and Hemipiliacrassicalcarata, but differs in having an oblong, simple labellum with a slightly involute margin, an upcurved apex, and a spur shorter than the ovary. Molecular phylogenetic analyses, using nuclear (nrITS) and plastid (combined matK, psaB, psbA-trnH, rbcL and trnL-F) DNA sequences, confirm that H.zhuxiensis is closely related to Hemipiliahenryi and Hemipiliacrassicalcarata, supporting its recognition as a new species in the H.sectionHemipilia as defined by Tang et al. (2015).