Vietnam, Nghe An Prov., Ky Son Distr., Muong Tip Municipality, near Pha Noi village at elevation about 900-1200 m a.s.l. around point 19°16″38″N 104°02′43″E.
Mixed open semi-deciduous submontane secondary forest on very steep slopes composed with granite and shale.
Tree 10-12 m tall along rocky steep stream slope. Flowers light yellowish. Not common.
HLF 7099 27 March 2007.
Coll. Averyanov L., N.T.Hiep, P.K.Loc, N.T.Vinh, N.S.Khang, N.V.Huy, Averyanova A.