Terrestrial fern. Rhizome short
globose and fleshy. Stipe fleshy. Frond large, bi-pinnate, pinnae with pulvinus
at bases of the rachis or not. Stipe and pinnae base swollen, pinnae base also
swollen, petioles bear lenticels all over. Pinnule oblong linear, elliptic.
Margin sub entire, serrate, cuneate, repando-crenate. Veins free, usually twice
forked, recurrent veins often present between the true veins, running from the
marginal teeth. Sori of two close rows of sporangia, attached along the veins.
Spore trilete, indusium present or absent.