Dandoborogiku - Dandoborogiku

Japanese: ダンドボロギク - だんどぼろぎく

A naturalized plant native to North America, an annual plant of the Asteraceae family (illustration). It is often found in sunny grassy areas of mountainous regions and after-logging sites. The stem is upright, 30-150 cm tall, and has many alternate leaves. Both the stem and the leaves are soft. The leaves are oblong or oblong-ovate, with sharp sawtooth edges and sometimes irregularly cut. The lower leaves often have petioles, but the leaves from the middle and higher are sessile and embrace the stem. The flowering season is September to November. The flower heads are borne in large panicles and consist of numerous female thread-like flowers and bisexual tubular flowers.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

北アメリカ原産の帰化植物で，キク科の一年草（イラスト）。山地の日当りのよい草むらや伐採跡地に多い。茎は直立し，高さ30～150cm，多くの葉を互生する。茎･葉ともにやわらかい。葉は長楕円形ないし長倒卵形で，縁に鋭い鋸歯があり，ときに不規則に切れ込む。下部の葉にはしばしば葉柄があるが，中部以上の葉は無柄で茎を抱く。花期は9～11月。頭花は大型の円錐花序に多数つき，雌性の糸状花と両性の筒状花とからなる。

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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