Northern Vietnam, Lao Cai Prov., Van Ban Distr., Khanh Yen Ha municipality, to the S of Na Nheo village (in the vicinity of point 21°59′04′'N, 104°15′08′'E). Primary closed broad-leaved evergreen wet submontane forest on steep granite and quartzite slopes of stream canyon at elev. 900-1150 m a.s.l. Terrestrial and lithophytic herb up to 0.5 m hg. Flowers white. Very common. Usual co-dominant of herb forest stratum.