Northern Vietnam, Lao Cai Prov., Van Ban Distr., Khanh Yen Ha municipality, to the SW of Na Nheo village (in the vicinity of point 21°57′15′'N, 104°12′39′'E). Primary broad-leaved evergreen montane forest along tops of granite/quartzite ridge at elev. 2650 m a.s.l. Tree 6-8 m hg. Flowers white, light yellowish. Common. Usual co-dominant of first forest stratum.