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). Secondary open broad-leaved evergreen lowland forest on granite and quartzite along river at elev. 300 m a.s.l. Climbing shrub 5-6 m hg. Flowers olive-green. Not common.