Stem scales strongly bicolored, margins brown, broad and well defined, thin, entire. Leaves 5--30 cm. Petiole brown, equal to or somewhat longer than blade, rounded adaxially, glabrous except for a few scales at base. Blade broadly pentagonal, deeply pinnatifid but not fully pinnate above base (distal pinnae connected by narrow wing of green tissue), 1--2 times longer than wide, abaxially with conspicuous yellowish farina, scales absent, adaxially glabrous; basal pinnae much larger than adjacent pair, strongly inequilateral, proximal basiscopic pinnules greatly enlarged. Ultimate segments sessile, broadly adnate to costae; segment margins slightly recurved, rarely concealing sporangia. Sporangia containing 32 or 16 spores. 2 n = 60.
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