Dichrocephala integrifolia (Ait.) O. Kuntze

Japanese: ブクリョウサイ（英語表記）Dichrocephala integrifolia (Ait.) O.Kuntze

An annual plant of the Asteraceae family that grows in moist places such as forest edges and the bottom of cliffs. The stem reaches a height of 40 cm, branches at the top, and is densely covered with powdery fine hairs. The lower leaves have long stalks and are medium to deep lobed in a pinnate shape. The upper leaves become smaller and almost unlobed. The leaves are thin, alternate, and covered with scattered short hairs on both sides. Flowering season is March to September. Flowering branches emerge from the top of the stem or the upper leaf axils, and bear numerous flower heads in a cluster. When in bloom, the flower heads are 2.5 mm in diameter, with 7 to 8 rows of female flowers on the edge, and the corolla is thin, tubular, and white.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

林縁や崖の下部などの湿った所にはえるキク科の一年草。茎は高さ40cmに達し，上部で分枝し，密に粉状の細毛を生じる。下部の葉は長柄があり，頭大羽状に中～深裂する。上葉になるにしたがって小型となり，ほとんど分裂しなくなる。葉は質うすく，両面に短毛を散生し，互生する。花期は3～9月。茎の上端や上部の葉腋（ようえき）から花枝が出て，多数の頭花を総状につける。頭花は開花時に径2.5mm，縁に7～8列の雌花があり，花冠は細い筒状で白色。

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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