FLORA OF VIETNAM Plants of Nui Chua national park Fam. Orchidaceae Appendicula hexandra (Koenig) J.J.Smith S.Vietnam, Ninh Thuan Prov., Ninh Hai Distr., Vinh Hai Municipality, NEE slopes on Nui Chua mountains to SW of point 11o43'52''N 109o08'35''E at elev. about 600-700 m a.s.l. Primary evergreen closed dry forest on rocky mountain slopes composed with granite. Lithophyte on shady rocks on rocky stream slope. Flowers white. Locally common. HLF 4271 28 March 2004. Coll. J.Regalado, N.T.Hiep, P.K.Loc, L.Averyanov, N.T.Vinh, P.V.Doan, T.T.An, N.T.Hoi, T.V.Huong, N.V.Su, T.T.T.Trang, H.A.Tuan. Grant from Henry Luce Foundation.