Thanh Hoa Prov., Thuong Xuan Distr., Bat Mot Municipality, Duc village, Xuan Lien Natural Reserve.
Primary broad-leaved evergreen forest along narrow ridge composed by shale at elevation 1000-1150 m a.s.l. around point 20°01′40.1″N 104°57′54.9″E.
Terrestrial herb in shady wet places on ridge slope. Flowers light pink, anthers yellow. Leaves uniform dark velvety green above, dull purple-brown below. Not rare.