Tên Khoa học: Peristylus prainii King & PantlingTên tiếng Anh: Tên tiếng Việt: Chu thư prainTên khác: Habenaria prainii Hook. f.; Yunorchis pingbianensis Liu, Zhang & Li; Yoania pingbianensis (Z.J.Liu, G.Q.Zhang & M.H.Li) Yukawa & Freudenstein;
The flowers are described as “pale brownish white”, and on the same sheet is a sketch by Joseph Hooker that shows a callus on the lip. The scales on the rhizome can be more or less densely arranged, and they do not present a reliable difference. The length and branching density of the rhizome are probably subject to variation as well, due to soil conditions and other environmental parameters, but not enough material is available to assess variability of this part of the plant.
Distribution:
Northeastern India:Sikkim, Nagaland
China: Yunnan
Vietnam: Ha Giang Province: Yen Minh district, Du Gia commune and Quan Ba district, Tung Vai (Bat Dai Son)