Climbing trimorphic rhizomatous fern with glabrous pinnate fronds, juvenile sterile fronds to 380mm long with 9-25 pairs of pinnae to 42mm x 10mm (bourne only only terrestrial rhizomes), adult sterile fronds to 760mm long with 20-30 pairs of pinnae, longest to 115mm x 18mm, fertile fronds to 610mm long with 20-30 pairs of pinnae, longst 175mm x 2.5mm.