FLORA OF VIETNAM Plants of Phong Nha - Ke Bang National Park Orchidaceae Polystachya concreta (Jack.) Garay & Sweet.
Vietnam, Quang Binh Prov., Bo Trach Distr., Tan Trach Municipality, about 0.5 km to E 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 solid crystalline limestone at elevation about 750-850 m a.s.l.
Epiphyte (Calocedrus rupestris, Podocarpus neriifolius) on tops of ridge. Rare.