FLORA OF VIETNAM Orchidaceae Dendrobium nobile Lindl.
N.Vietnam, Bac Kan Prov., Cho Don Distr., Ban Thi Municipality,
village Phia Khao, Lung Li valley, around point 22°16′10′'N, 105°31′01′'E, Cot Moc mountain at elevation 800-900 m a.s.l.
Primary broad-leaved evergreen closed forest on very steep slopes and cliffs near tops of rocky ridge composed with solid marble-like stratified limestone.
Epiphyte. Flowers light pink with violet-purple apex of tepals, lip white with large deep purple-violet central spot. Occasional.