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. 2400-2650 m a.s.l. Shrub 1.5-2 m hg in open rocky slope. Flowers white. Very common.