Northern Vietnam, Lao Cai Prov., Van Ban Distr., to the west of Nam Xay village (21°58′42′'N, 104°00′37′'E). Primary broad-leaved evergreen wet montane forest with Fokienia hodginsii (as emergent) on rocky slope at elev. 1650 m a.s.l. Lithophytic herb on wet mossy stream rocks up to 20 cm hg, flowers white. Locally common.