Plants small, epiphytic. Rhizome long creeping, dictyostelic, densely scaly; scales peltate, broad at base, acuminate toward apex, margin often minutely ciliate or denticulate. Fronds remote; stipe slender, adaxially grooved, articulate to rhizome, scaly near base; lamina tripinnatifid, rarely simple or pinnatifid, usually deltoid, leathery; fertile lamina usually more dissected than sterile one. Veins free. Sori submarginal, terminal on acroscopic veinlet; indusium orbicular or semicircular-reniform, attached at base only, or by sides slightly above base, long stalked; annulus longitudinal, consisting of 12 thickened cells; spores elliptic, densely tuberculate; perispore absent. n = 10, (40).