Appearance''A. pedatum'' grows 30–75 cm tall, and is deciduous. It grows in a variety of habitats, but generally favors soils that are both humus-rich, moist, and well-drained. It grows both in soils and on rock faces and ledges when adequate moisture is present.
NamingSeveral species have been segregated from the former ''A. pedatum'', ''sensu lato''. These include ''A. aleuticum'', ''A. viridimontanum'', ''A. myriosorum'', and ''A. subpedatum''. These all have fronds distinctively bifurcated and with pinnae on only one side.
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