Perennial. Rhizome creeping, with dense scales. Leaves 5-30 cm, persistent, 2-3-pinnatisect, glabrous; blade ovate to oblong in outline, with a slender, black rhachis, ultimate segments alternate, petiolulate, obliquely cuneate-obovate, irregularly lobed or incised, often serrate at tip; veins thin, forked, free; petiole long, hairy, brown to black. Sori 2-10 on each segment, covered by rectangular, oblong or reniform recurved parts of lobes (pseudo- indusium). Almost the whole year.