Kusasotetu - Kusasotetu

A summer-green fern of the Dryopteris family. It is also known as Gansoku and Kogomi. Its leaves grow in bundles from a short, upright rhizome. There are two types of leaves: vegetative and sporophyll. The vegetative leaves are 1 meter tall, oblanceolate, and wider at the top. They are twice pinnately divided, and are a thin, bright green herbaceous substance. The pinnae are narrowly lanceolate and deeply pinnately lobed, and the lower pinnae are reduced to ear-like shapes. The sporophyll is shorter than the vegetative leaves, and is 60 centimeters tall. The pinnae are linear, shallowly lobed, and roll up on the underside to encase the sporangia. The kusa-cycad grows underground from the rhizome, and new shoots emerge from the tips of these branches, so it usually grows in colonies and is found in forests throughout Japan. The name comes from the leaf shape, which resembles that of a cycad. Young leaves are boiled, boiled, or pickled. Another name, Kogominomi, means edible, and Gansoku comes from the fact that the base of the petiole grows in a bundle, resembling the legs of a goose.

[Makoto Nishida]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

オシダ科の夏緑性シダ。ガンソク、コゴミの別称がある。直立する短い根茎から葉を束生する。葉には栄養葉、胞子葉の2型があり、栄養葉は高さ1メートル、倒披針(とうひしん)形で上部が幅広い。2回羽状に分裂し、鮮緑色の薄い草質。羽片は狭披針形で羽状に深裂し、下部羽片は耳状に縮小する。胞子葉は栄養葉よりも低く、高さ60センチメートル。羽片は線形で浅く裂け、裏側に巻いて胞子嚢(ほうしのう)群を包む。クサソテツは根茎から地下枝を分枝し、その先端から新株を出すので群生するのが普通で、分布は、日本各地の林中。葉形がソテツに似ているのが名のおこりである。若葉をゆでて、おひたしにし、また漬物にして食べる。別称のコゴミのミは食用を意味し、ガンソクは葉柄基部の束生状態をガンの足に見立てたものである。

［西田　誠］

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