FLORA OF VIETNAM Gesneriaceae Didissandra ? aspera Drake
N.Vietnam, Thanh Hoa Prov., Ba Thuoc Distr., Co Lung Municipality, Phia village, around point 20°26′44′'N, 105°11′13′'E. Secondary heavily logged dry evergreen seasonal broad-leaved lowland forest on crystalline marble-like highly eroded limestone, rocky hill slope at elev. 50-100 m. Lithophytic herb 1-1.5 m tall on vertical shady cliff. Flowers light green. Occasionally common.