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Terrestrial or epiphytic fern which grows to 1m, with small, erect, scaly rhizomes which produce many long runners and round, 1-3 cm hairy potato-like tubers. Fronds (40-100 x 5-8 cm) are erect or arching when long, with serrated, divided leaflets.
Spreads by spores, runners and tubers, and forms dense, long-lived patches which are often large. Grows in the damp or dry, on the ground or in trees, in the open or the shade, in most soil types and in hot to moderately cool temperatures.
Crowds out groundcovers, shrubs and other ferns, and can contribute to streamside erosion.