FLORA OF VIETNAM Orchidaceae Epipactis alatus Aver. et Efimov, sp.nov., Type.
Vietnam, Ha Giang Prov., Meo Vac Distr, Sung Tra Municipality, vicinities of Ta Cha Lang village around point 23°10′12″N, 105°17′39″E at elevation about 1100-1150 m a.s.l.
Highly degraded remnants of coniferous forest with Tsuga chinensis on very steep rocky slope of rocky remnant ridge composed with highly eroded marble-like limestone.
Terrestrial herb on very steep shady rocky slope. Tepals light pink, lip purple-violet, epichile with yellow center, hypochile with yellow center and numerous small deep brown warts, column and anther pure white. Very rare.