Northern Vietnam, Lao Cai Prov., Van Ban Distr., to the west of Nam Xay village (1 km to the W of point 21°59′00′'N, 104°02′00′'E). Primary broad-leaved evergreen wet submontane forest with Dacrycarpus imbricatus on granite and quartzite steep slopes at elev. about 1300 m a.s.l. Small shrublet or herb up to 1 m hg in open place. Flowers white with light violet tint, tepal tips purple-violet.