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 about 2300 m a.s.l. around point 19°12′23.3″N 104°11′33.7″E.
Tree 3-4 m tall (probably to 20 m tall) on steep slope. Flowers yellowish. Common.