Orchidaceae Juss. Thelasis pygmaea (Griff.) Blume S. Vietnam, Prov. Kontum. Primary (?) evegreen dry forest on top of ridges at 1400 m alt. on W slope of Ngoc Linh mountain system above Ngoc Linh village.
Epiphyte, especially on Quercus and Lithocarpus ssp. Flowers yellowish green. Abundant. VH 1202 06.04.1995 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