Bear Bracken - Bear Bracken

Japanese: クマワラビ - くまわらび

A perennial fern of the Dryopteris family (illustration), commonly found on Okushiri Island in Hokkaido and in warm areas south of Honshu. It is evergreen, with several leaves growing in clusters from a thick rhizome. The leaves are pale green, bipinnate, elliptical to obovate, and 30-60 cm long. The petioles are densely covered with large pale brown scales, and the Japanese name Kumawarabi (bear bracken) is based on this impression. Small, thin scales remain somewhat sparsely on the central axis and rachis. The veins are markedly depressed on the leaf surface. The sporangia are attached to the upper pinna, and this part of the leaf surface degenerates and shrinks.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

北海道の奥尻島と本州以南の暖地にふつうにみられるオシダ科の多年生シダ植物（イラスト）。常緑性で，太い根茎から数枚の葉を叢生（そうせい）する。葉は淡緑色で，2回羽状複生，楕円形から倒卵形で，長さ30～60cm。葉柄には淡褐色の大型鱗片が密生し，熊ワラビの和名は，その印象に基づく。中軸や羽軸には細くて小型の鱗片が，ややまばらに残る。葉脈は葉の表面で著しくくぼむ。胞子囊群は上部の羽片につき，この部分の葉面は退化･縮小する。

出典　株式会社平凡社世界大百科事典第２版について　情報

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