Orchidaceae Juss. Cleisostoma williamsonii (Reichenb.f.) Garay S. Vietnam, Prov. Kontum. Evergreen primary forest on W slope of Ngoc Linh mountain system at 1300 m alt. Elevation from Dak Mek river to Long Nam village. Epiphyte. Flowers white (old yellowish), lip with purple lateral dents. Common. VH 827 17.03.1995 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5094-93)
Participants: L. Averyanov, N.T. Ban, N. Q. Binh, A. Budantzev, L. Budantzev, N.T. Hiep, D.D. Huyen, P.K. Loc, N.X. Tam, G. Yakovlev