Rhizome short, erect or creeping, clad in latticed scales. Fronds tufted. Lamina simple, pinnate or further divided; primary rachises usually shallowly grooved, the centre of which may be raised in larger plants; pinnae bases thickened at edge, decurrent on margins of rachis groove; veins free or anastomosing near margin, midribs and veins usually raised on upper surface. Sori oblong to linear, along veinlets; indusium oblong to linear, membranous.
About 650 species widespread throughout the world; 29 occurring in Australia, 9 in Victoria.