N. Vietnam, Thanh Hoa prov., Ba Thuoc distr., Eo Dieu municipality, territory of Pu Luong protected area, near Eo Dieu village (20°25′48′'N, 105°14′13′'E). Primary wet broad-leaved evergreen forest along tops of remnant highly eroded karst limestone ridge at elev. 600-700 m a.s.l. Young treelet 1.5 m hg on shady rocky slope. Rare.