Caudex not known; fronds dimorphous. Sterile frond: stipe 12 cm long, minutely hairy, its basal scales to 5 mm long; lamina 22 cm long, consisting of 3 pairs of pinnae and a pinna-like apex 16 × 3.8 cm; basal pinnae 15 × 3 cm, short-stalked, with a basal basiscopic lobe 12 × 2.3 cm, otherwise entire; suprabasal pinnae somewhat shorter, simple and entire, abruptly narrowed at the base on the basiscopic side; lower surface of costae minutely hairy near bases of pinnae only, upper surface similarly hairy throughout. Fertile frond of type: stipe 43 cm long, stramineous; lamina 28 cm long, consisting of 4 pairs of pinnae and a pinnalike apex, all c. 1.5 mm wide; apex 15 cm long, uppermost pinnae much decurrent on rachis, second pair of pinnae 9 cm long and decurrent 5 mm, third pair slightly decurrent, basal pinnae 18 cm long (including stalk 5 mm), forked 15 mm above their bases, basiscopic lobes 13 cm long (basal pinnae of Elbert 673 13 cm long with 2 lobes 8 cm and 5 cm long on the basiscopic side), all pinnae and lobes c. 2 mm wide, covered beneath with sporangia on each side of the costa except for a narrow margin.
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