FLORA OF VIETNAM Orchidaceae Juss. Ornithochilus difformis (Wall. ex Lindl.) Schltr.
N. Vietnam, Hoa Binh prov., Da Bac distr., to the SW of Doan Ket village (20°54′01′'N, 105°04′19′'E). Primary broad-leaved evergreen forest on steep slopes of remnant highly eroded limestone ridge at elev. 800-1000 m a.s.l. Epiphyte. Common. HAL 298 29 March 2001