Thanh Hoa Prov., Thuong Xuan Distr., Bat Mot Municipality, Duc village, Xuan Lien Natural Reserve.
Secondary broad-leaved evergreen forest on very steep mountain slopes composed by shale at elevation 800-900 m a.s.l. around point 20°00′37.0″N 104°57′16.9″E.
Terrestrial herb in shady places along road. Flowers purple-violet, leaves dark green, often with numerous white spots above, below – dark purple-violet. Locally very common.