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DescriptionPlants small, terrestrial or lithophytic. Rhizome creeping, rhizome scales linear, attenuate concolorous or variegated. Fronds tufted, flabellate, dichotomously divided into linear segments, sometimes dimorphic with fertile and sterile fronds, these strongly or weakly differentiated; fertile fronds usually larger than the sterile. Sori in a submarginal line, covered by a modified marginal indusium. Indusium continuous, entire.