From the Greek pyrros, flame-coloured, in reference to the reddish lamina scales of some species
Rhizome: creeping, with phylopodia, scaly.
Frond: evergreen, monomorphic or nearly so.
vascular bundles: .
Blade: simple or pedate, ovate often, leathery or papery, stellate scales.
Sori: round or oblong, ends of veins, indusium: absent, sporangia: yellow to brown at maturity.
epiphytic or epipetric, stellate hairs on the lamina