Fronds1 to irregularly 4-pinnate, herbaceous. Sori in broad linear bands along margin of frond. Rhachis deeply grooved. Pteridaceae
Fronds 1-pinnate or imperfectly bipinnate with some of the lower primary pinnae divided into a few, ribbon-like, sessile segments. Veins free, transverse to the midrib, usually simple or once forked
Fronds 2–4-pinnate; the pinnules never ribbon-like. Veins reticulate or free and once forked