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A small to medium-sized, terrestrial, low-epiphytic, or low climbing ferns. Rhizome with short to long creeping, unbranched or with accessory branches, dorsally or laterally with 2-6 rows of fronds. Fronds spaced to aggregate, dimorphic, simple, pinnate or rarely bipinnate. Sterile fronds with stipe usually short, decurrent on rhizome. Lamina green, above somewhat shining, texture mostly more or less herbaceous, sometimes coriaceous, in most species with one or more variously situated bulbils. Fertile fronds of similar shape as the sterile ones, but with longer stipes, lamina cotracted, bulbils present in both the fronds. Sori acrostichoid, asplenoid, pteridioid, gymnogrammoid and moniliform type.