Nghe An Prov., Ky Son Distr., Na Ngoi Municipality, Phu Kha village, eastern slopes of Phu Xai Lai Leng mountain system.
Primary broad-leaved forest on steep eastern granite slopes of Phu Xai Lai Leng Mountain at elevation 1700- 2300 m a.s.l. around point 19°12′54″N 104°12′01″E.
Terrestrial herb or undershrub to 1.5 m tall in rather open place along road. Flowers ligjht violet. Common.