Caudex short, suberect; stipe to 80 cm long, light castaneous, glabrescent; basal scales 1-1.5 mm wide; lamina to 90 cm long, apex usually simple or trilobed, pinnae to 8 pairs, their margins subentire to sinuous, distal pinnae adnate and slightly decurrent; middle pinnae to 30 cm long, narrowly acuminate, sterile ones to at least 4.5 cm wide, fertile ones commonly 2 cm wide (rarely to 3.5 cm); basal pinnae stalked, with at least one large basiscopic lobe, in Philippine specimens sometimes several other lobes, decreasing distally; minute hairs variably present on the lower surface of costae; sori in one row on each side of main veins, in narrower fertile pinnae distinctly immersed and sometimes on single veins in areoles, in broader pinnae hardly immersed and not on solitary veinlets; indusia peltate, quite circular on young sori, glabrous or papillate on upper surface; spores spinulose.
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