Rhizome short-creeping, roots
abundant densely covered with brown hair, scales clathrate, toothed, uniformly
or differently thickened. Fronds simple linear, narrow, entire, leathery,
stipulate or sessile, usually without distinct stipe. Lamina glabrous above and
below. Lateral veins slightly distinct in some cases, entire midrib obscure to
distinct, to the apex of the frond. Sorus linear, with a single row at each
side of the costa, in marginal or extra-marginal grooves, extrose or erect.
Spores yellowish-green to bright yellow, spores monolete and exine smooth.