FLORA OF VIETNAM Orchidaceae Phaius flavus (Blume) Lindl.
N.Vietnam, Bac Kan Prov., Cho Don Distr., Ban Thi Municipality, village Phia Khao, around point 22°16′58′'N, 105°31′20′'E at elevation 800-900 m a.s.l. (Lung Chang and Lung Li mountains).
Primary broad-leaved evergreen closed wet forest on very steep slopes and cliffs of rocky ridges and mesae composed with solid marble-like stratified limestone.
Terrestrial and lithophytic herb up to 1.5 m tall on shady slope of lower part of ridge along valley. Leaves uniform green. Common.