Rhizome scales coarse and narrow, with fine tips, some hair-like. Fronds uniform or dimorphic, not articulated; stipe and rachises grooved on upper surface. Lamina glabrous, fan- or wedge-shaped, regular or oblique. Pinnae decurrent on raised edge of rachis; veins forking several times, midribs absent. Sori protected by narrow, outward-opening flap (margin of leaf often so delicate that sori appear to be protected by a double indusium); spores tetrahedral.
About 200 species; 14 occurring in Australia, 3 in Victoria.
Source:
Entwisle, T.J. (1994). Ferns and allied plants (Psilophyta, Lycopodiophyta, Polypodiophyta). In: Walsh, N.G.; Entwisle, T.J., Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons, pp. 13–111. Inkata Press, Melbourne.
