FLORA OF VIETNAM Polypodiaceae s.l. Colysis digitata
N.Vietnam, Ha Tinh Prov., Huong Son Distr., Son Hong Municipality, around point 18°34′06′'N, 105°11′40′'E. Heavily logged primary broad-leaved evergreen dry forest on steep mt slopes composed with shale at elev about 250-350 m a.s.l. along Song Con river valley. Lithophytic fern. Common. HAL 5279 10 May 2004