Torn gas - Torn gas

A perennial plant of the Asteraceae family. The stems reach a height of 1 meter. The stem leaves are stalked and alternate in 2-3 pieces, the leaf blade is palmately divided into 7-9 lobes, and the lobes are sometimes further divided into middle lobes. The upper leaves have petioles that attach to the bottom, while the lower leaves have petioles that attach like shields. The name "Yaburegasa" comes from the fact that it resembles a torn umbrella. From July to September, a large panicle is produced at the top of the stem, and many flower heads are produced. The flower heads consist of about 10 white tubular flowers. The involucre is pale greenish white and tubular, with 5 involucre segments. The seedlings inside the seeds have only one circular cotyledon, making this a very unique species. It grows under forests in mountainous areas, and is distributed from Honshu to Kyushu and the Korean peninsula. The young shoots are edible.

[Hiroyuki Koyama]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

キク科の多年草。茎は高さ1メートルに達する。茎葉は柄があって2、3枚が互生し、葉身は掌状に7～9裂し、裂片はときにさらに中裂する。上葉は葉柄が底着するが、下葉は葉柄が盾のようにつく。ヤブレガサの名は、これを破れた傘を広げた形に見立てたことによる。7～9月、茎頂に大形の円錐(えんすい)花序をつくり、多数の頭花をつける。頭花は約10個の白色の管状花からなる。総包は淡緑白色で筒状、総包片は5枚。種子内の幼植物の子葉が円形で1枚しかない点で、きわめて特異な種と考えられる。山地の林下に生え、本州から九州、および朝鮮半島に分布する。若芽を食用とする。

［小山博滋］

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