Rhizome filiform. Fronds simple and grass-like. Sporocarps solitary in axil of sterile frond, sessile or shortly pedunculate, divided into 2 or 4 loculi containing microsporangia and megasporangia.
6 species world-wide; 1 in Australia. Confined to temperate, swampy areas.
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.
