FLORA OF VIETNAM Convolvulaceae Argyreia aff. atropurpurea Wall.
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. 400-500 m. Vine 10-15 m lg. Flowers white with light violet tint. Common.