Northern Vietnam, Lao Cai Prov., Van Ban Distr., to the west of Nam Xay village (21°58′42′'N, 104°00′37′'E). Primary evergreen wet broad-leaved submontane & montane forest at elev. 1300- 1700 m a.s.l. Terrestrial herb in shady slope with bamboo. Flower tepals green, anthers yellow. Not common.