Quang Binh Prov., Minh Hoa Distr., Dan Hoa Municipality, Giang Man Ridge (Vietnam-Laos border) near Cha Lo Vietnam-Lao border gate around point 17°41′50”N 105°45′54”E.
Primary evergreen broad-leaved and coniferous (with Dacrycarpus and Fokienia) wet forest along ridge edge composed with shale and sandstone at elevation about 900-1100 m a.s.l.
Terrestrial herb in shady wet place. Leaves light pink-violet underside. Occasional.
HAL 12382 8 February 2009 Coll.: L.Averyanov, P.K.Loc, N.T.Vinh, L.T.Son.