Nghe An Prov., Ky Son Distr., Na Ngoi Municipality, eastern slopes of Phu Xai Lai Leng mountain system.
Primary broad-leaved and mixed forest (with Cunninghamia) on very steep mountain slopes on granite at elevation about 1900 m a.s.l. around point 19°13′37.5″N 104°06′11.8″E.
Terrestrial herb to 1 m tall on open place along road. Flowers white with little pink. Very common.
20 October 2013 CPC 6010 Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, L.M.Tuan