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DescriptionTerrestrial or epilithic ferns. Rhizome subterranean, short-creeping, branched, with closely-spaced dimorphic fronds. Sterile frond lamina simple, narrowly linear, with a simple, central midrib, glabrous or spacely set with hairs. Fertile frond very narrowly linear with a crowded group of fertile pinnae at the apex, margin divided into a fringe of slender lobes, abaxially densely set with hairs. Sporangia in 2 rows, one on either side of each fertile pinna.