Caudex short, erect; stipe of fertile fronds to 35 cm long, of sterile shorter, very dark, glabrescent; basal scales to 7 mm long, firm, not hair-pointed; lamina firm, commonly to 15 cm long (largest seen 25 cm), very deeply trilobed, the lateral lobes, especially on fertile fronds, usually with small basiscopic lobules of variable size, base of lamina not cordate; apical lobe of fertile fronds commonly 3-4 cm wide, of sterile variably wider; a scaly bud often present near the base of a lateral costa on the lower surface; small veins concolorous on lower surface, sometimes hardly distinct though evident by transmitted fight; lower surface glabrous; upper surface of costae densely short-hairy near their bases, less so distally; sori mostly on free veins in areoles, exindusiate, often ± elongate or confluent
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