Rhizome 15 mm or more wide, densely scaly near apex; scales to 10 by 3 mm. Stipes to 30 cm long;, frond to 70 cm, pinnae to 10 pairs. Sterile pinnae 18-35 by 2½-5 cm, rather abruptly short-acuminate, conspicuously stalked (stalks of lowest pinnae 5-20 mm long), thick, rigid and brownish when dry, veins to 2 mm apart, simple or once forked, at c. 60° to costa. Fertile pinnae as long as sterile and similarly stalked, commonly 10-15 mm wide (to 20 mm); spores c. 100 μm long excluding perispore which is very wide, elaborately folded, without conspicuous reticulate thickening.
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