FLORA OF VIETNAM Orchidaceae Dendrobium aduncum Wall. Ex Lindl.
N.Vietnam, Bac Kan Prov., Na Ri Distr., Liem Thuy Municipality, Na Bo village, around point 21°56′44′'N, 106°05′09′'E, at elevation 300-600
m a.s.l.
Primary selectly logged broad-leaved evergreen forest on very steep slopes and cliffs of rocky ridge composed with white solid marble-like crystalline limestone.
Epiphyte and lithophyte. Flowers light purple-violet. Occasional.