FLORA OF VIETNAM Plants of Phong Nha - Ke Bang National Park 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 (17°23′32′'N, 106°12′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.