Arachniodes amabilis (Bl.) Tindale var. fimbriata K. Iwatsuki

Japanese: オオカナワラビ（英語表記）Arachniodes amabilis (Bl.) Tindale var.fimbriata K.Iwatsuki

An evergreen perennial fern of the Dryopteris family, commonly found in lowland forests and forest edges from the Kanto region westward. The rhizome runs short and horizontal, with 3-4 leaves. The leaves are bipinnate, dark green, papery, and have 3-7 pairs of lateral pinnae and an identically shaped terminal pinnae. The leaflets are nearly parallelogram-shaped, with acute serrations at the tips of short spines. The sporangia are located close to the margins of the leaflets, and the integument is reniform with some of the edges extending in a hair-like manner. It prefers moist soil, and is sometimes considered an indicator plant for cedar reforestation. The parent species, A. amabilis (Bl.) Tindale, is distributed from India through China to Yakushima.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

関東以西の低地の林内や林縁に普通なオシダ科の常緑多年生シダ植物。根茎は短く横走し，3～4枚の葉をつける。葉は2回羽状複生，濃緑色で硬紙質，3～7対の側羽片と，同形の頂羽片が発達する。葉片は平行四辺形に近く，鋭鋸歯の先は短刺状となる。胞子囊群は葉片の辺縁に近くつき，包膜は円腎形で，縁の一部が毛状に伸びる。湿った土壌を好み，スギの造林のさいの指標植物の一つとされることがある。母種のヤクカナワラビA.amabilis (Bl.) Tindaleは，インドから中国を経て屋久島まで分布している。

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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