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The Tokyo wood fern (Dryopteris tokyoensis) belongs to the family Dryopteridaceae. It is a summer-green fern that is distributed throughout Japan, as well as on the Korean Peninsula and in southeastern China. It grows in sunny wetlands and reaches a height of 100 to 150 cm. The rhizome is short, thick, and erect. The leaves are oblanceolate, 60 to 85 cm long, pinnately compound, and grow in tufts. The pinnae are linear to linear-lanceolate, with 30 to 40 pairs. The sori are located near the midrib of the pinnae, and the indusia are reniform. In Chinese, it is called "東京鱗毛蕨" (dong jing lin mao jue).
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