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. 2300-2400 m a.s.l. Treelet 5-6 m hg. Flowers light pink-violet with small violet spot at the base of tube. Common.