Pteridaceae

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 imperfectly bipinnate with some of the lower primary pinnae divided into a few ribbon-like sessile segments. Primary pinnae increasing in size towards the base of the frond; the upper and middle primary pinnae sessile, decurrent
Lowest primary pinnae 20–35 cm long. Fronds scarcely dimorphic; the sterile fronds very slightly broader; the sterile pinnules ribbon-like. Plants 0.6–2.6 m high. Widespread. RF, often on basalt, usually amongst rocks. Jungle Brake Pteris umbrosa
Lowest primary pinnae 5–16 cm long. Fronds markedly dimorphic; the sterile fronds shorter and broader; the sterile pinnules oblong or ovate. Plants 20–30 cm high. Coast and adjacent plateaus especially near Sydney. In railway cuttings. Introd. from Qld. Pteris ensiformis