FLORA OF VIETNAM Plants of Phong Nha - Ke Bang National Park Orchidaceae Vanilla sp.
Vietnam, Quang Binh Prov., Bo Trach Distr.,Son Trach Municipality, around point 17°30′32′'N, 106°17′45′'E at elev. 300-400 m a.s.l.
Secondary closed broad-leaved evergreen forest and scrub on rocky steep slopes of remnant mountains composed with solid highly eroded crystalline deep gray limestone.
Creeping lithophytic and epiphytic vine up to 10 m long on shady vertical cliffs. Occasional.