short, sub-erect, bearing a tuft of fronds. Stipes slender, nearly black
polished. Rachis as stipe, grooved on the upper surface. Fronds small, narrow
to broadly deltoid, bipinnatifid to tripinnate. Veins free. Sori terminal on
the veins. Sporangia confined to the vein-tip and more or less laterally and
jointed by a commissure. Sori linear when the sporangia are mature, usually
discontinuous. When young protected by the reflexed and more or less modified
edge of the lamina. Spores tetrahedral, without perispore.