FLORA OF VIETNAM Plants of Phong Nha - Ke Bang National Park Fam. Orchidaceae Appendicula hexandra (Koenig) J.J.Smith ? Vietnam, Quang Binh Prov., Bo Trach Distr., Tan Trach Municipality, about 1.5 km to SE of A Rem village (17º23'32''N, 106º12'46''E). Primary closed coniferous forest (with Calocedrus rupestris) on steep slopes and on tops of rocky ridge composed with solid marble-like highly eroded stratified crystalline limestone at elevation about 750-900 m a.s.l. Lithophyte and epiphyte (Calocedrus rupestris, Podocarpus neriifolius)on shady mossy vertical cliff. Very common. No HAL 6134 25 January 2005. Photo.Collectors: L.Averyanov, P.K.Loc, P.V.The, A.Averyanova, N.T.Vinh, N.Q.Vinh, N.T.Binh.