Materials and methods
Specimens and living plants of this new species and Cylindrolobus arunachalensis (A. N. Rao) A. N. Rao were collected from Gaoligong Mountain, northwest Yunnan, and Motuo, southeast Xizang respectively. Morphological characters of both orchid species were observed, measured and photographed based on their living individuals. All voucher specimens were deposited in the Herbaria of the Kunming Institute of Botany (KUN), Chinese Academy of Sciences (CAS), and the Yunnan Academy of Forestry and Grassland (YAF). The living plants were kept in the laboratory greenhouse of the Kunming Institute of Botany, CAS.