N.Vietnam, Thanh Hoa Prov., Quan Hoa Distr., Phu Le Municipality, Hang village, around point 20°31′33′'N, 105°05′06′'E. Primary evergreen seasonal broad-leaved closed lowland forest on very steep slopes of rocky ridge composed with crystalline marble-like highly eroded limestone at elev. 350-500 m. Tree 40-50 m tall. Occasional. Co-dominant of 1 forest stratum.