FLORA OF VIETNAM Orchidaceae Amitostigma bidupense Aver. S. Vietnam, Dak Lac Prov., Krong Bong Distr., Cu Pui Municipality, elevation from Dak Tour village (12ø30'N, 108ø30'E) to main peak of Chu Yang Sinh mt system (12ø24'N, 108ø26'E) along Dak Tour river (N slope). Primary mossy cloud mixed forest (with Pinus, Fokienia, Dacrydium and Dacrycarpus) on very steep granite slopes at elev. 2000-2200 m. Lithophyte on vertical mossy cliffs. Flowers pink-purple. Very common at elev. 2000-2400 m. No VH 6159 09.05.2000 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6383-98) Collectors: L.Averyanov, N.T.Hiep, N.Q.Hieu, P.H.Hoang, D.X.Du, N.T.Vinh