Emilia sonchifolia (L.) DC.

Japanese: ウスベニニガナ（英語表記）Emilia sonchifolia (L.) DC.

An annual plant of the Asteraceae family (illustration) that is widely distributed from Africa to the tropics and subtropics of Asia. It is somewhat common in the Ryukyu Islands, but is only seen in the summer in the warmer regions of Honshu west of Shizuoka Prefecture, Shikoku, and Kyushu. In tropical regions, the plant body before flowering is used as a vegetable. The height is about 40 cm. The stem is thin and often branches at the base, with several stalks tilting upward. The lower leaves have winged stalks and round leaf blades. The upper leaves are egg-lanceolate in shape and grow at the base, embracing the stem. Both the upper and lower leaves have projections on the edges, and are powdery green along with the stem.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

アフリカからアジアの熱帯･亜熱帯にかけて広く分布するキク科の一年草（イラスト）。琉球ではやや普通にみられるが，静岡県以西の本州や四国，九州の暖かい地方では夏季にしか姿を見せない。熱帯域では開花前の植物体を野菜とする。草丈は40cm内外。茎は細く，しばしば基部で分枝し，数本が傾上する。下葉には翼のある柄があり，葉身が円い。上葉は基部が茎を抱くようにつき，卵状披針形である。上･下葉とも縁には突起があり，茎とともに粉緑色である。

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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