Thanh Hoa Prov., Thuong Xuan Distr., Bat Mot Municipality, Duc village, Xuan Lien Natural Reserve. Primary broad-leaved evergreen forest along narrow ridge composed by shale at elevation 1000-1150 m a.s.l. around point 20°01’40.1’’N 104°57’54.9’’E. Treelet 2.5 m tall in shady places along ridge edge. Occasional.