Caudex suberect; stipe to 70 cm long, castane-ous, its basal scales to 15 mm long, 2 mm or more wide; lamina to 70 cm long, its apical section deeply multilobed, the lower lobes grading to adnate or sessile pinnae; middle pinnae to 30 cm long, short-acuminate, of sterile fronds to 8 cm wide, of fertile fronds 3-5 cm wide (of type 4.5 cm), firm, drying brown-olivaceous, margins crenate to almost entire; basal pinnae distinctly stalked and bearing a large basiscopic lobe; main veins in pinnae 7-10 mm apart along the costa, in fertile fronds with 2 fairly regular rows of areoles between them; minute hairs variously present on lower surface of costae, upper surface of costae glabrous or nearly so; sori on free veinlets in areoles, rather large; indusia firm, slightly reniform, attached to a linear receptacle 0.5 mm long; spores with irregular thin fimbriate wings; plants in Malay Peninsula diploid (Holttum 1955: 626).
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