N. Vietnam, prov. Cao Bang, distr. Nguyen Binh, municipality Ca Thanh. (N 22°44' E 105°50'). Primary semideciduous mixed forest along tops of. remnant karst limestone ridge at 1350-1400 m elev. Creeping. lithophyte. Flowers: tepals pale yellowish, lip, column foot and column. purple-violet, lip sides yellowish, anther yellow. Rare. No CBL 1304c 13 April 1999. International Botanical Expedition of the U.S.A. National Geographic. Society (grant No 6300-98).
Collectors: P.K.Loc, P.H.Hoang, Averyanov L.
Coordinates (geographic position):22° 44′ N, 105° 50′ E ±1000 mRecord creation: 2019-06-21, Leonid Averyanov, PhotoScan D1. Processing status: work_status_1Citation: Specimen LE 01055659 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01055659