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 very wet evergreen closed broad-leaved montane forest with bamboo on steep granite and quartzite slopes along rocky stream at elev. 1700 m a.s.l. Lithophytic herb 0.5 m hg on wet stream rocks. Flowers white. Abundant. Usual co-dominant of herb riparian community.