Nghe An Prov., Ky Son Distr., Na Ngoi Municipality, eastern slopes of Phu Xai Lai Leng Mountain.
Primary very humid broad-leaved forest on steep mountain slopes composed of sandstone and gray shale at elevation 2400-2500 m a.s.l. around point 19°12′17.7″N 104°11′06.6″E.
Terrestrial creeping herb. Flowers purple. Very common from 2400 to 2700 m a.s.l.