Northern Vietnam, Lao Cai Prov., Van Ban Distr., Khanh Yen Ha municipality, to the N of Na Nheo village (in the vicinity of point 21°59′12′'N, 104°15′49′'E). Remnants of primary broad-leaved evergreen lowland and submontane forests on very steep granite and quartzite slopes of river canyon at elev. 400-700 m a.s.l. Treelet about 5 m hg Flowers reddish, tepals with yellow apex. Not common.