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′59′'N, 104°14′06′'E). Secondary open evergreen broad-leaved montane forest with bamboo on steep granite and quartzite slopes at elev. 1800 m a.s.l. Woody vine 8-10 m lg. Very common.