Bolbitis subcordata (Copel.) Ching

Japanese: ヘツカシダ（英語表記）Bolbitis subcordata (Copel.) Ching

A perennial herb of the family Malvaceae, which grows on the ground or on rocks under shady forests. It was named after the place where it was found in Hetsuka, Osumi Peninsula, Kagoshima Prefecture, and hence its Japanese name. It is evergreen. The rhizome is short and creeping, dorsoventrally oriented, and the leaves emerge only from the upper side. The scales at the base of the rhizome and petiole are opaque black-brown. The leaves are slightly adjacent and form two types. The vegetative leaves have slightly short stalks, are 40-80 cm long, and are simply pinnate. The pinnae are oblong-lanceolate, have shallow wavy margins, the terminal pinnae are long and bud, and have reticulate veins. The sporophylls are taller than the vegetative leaves, have long petioles, and have short and narrow pinnae.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

陰湿な林下の地上または岩上に生えるシダ植物ツルキジノオ科の多年草。鹿児島県大隅半島の辺塚から見つかったのにちなんで，和名がつけられた。常緑性。根茎は短くはい，背腹性があり，葉は上側からのみ出る。根茎と葉柄基部につく鱗片は，黒褐色不透明。葉はやや相接し，2型をなす。栄養葉はやや短い柄をつけ，40～80cm，単羽状。羽片は長楕円状披針形，葉縁は浅い波状縁，頂羽片は長くのびて芽をつけ，葉脈は網状。胞子葉は栄養葉よりも高く，葉柄は長く，羽片は短く狭い。

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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