Heliopsis helianthoides (L.) Sweet

Japanese: キクイモモドキ（英語表記）Heliopsis helianthoides (L.) Sweet

A perennial plant of the Asteraceae family, also known as dwarf Jerusalem artichoke. It was named after the fact that it does not have a tuber, similar to the Jerusalem artichoke, which has a tuber underground. Native to North America, it is distributed in Ontario, Florida, Illinois, etc., and was introduced to Japan in the mid-Meiji period. It grows to a height of 1.5m, branches from the base, and grows in a clump, with the entire plant being hairless and having egg-shaped leaves with coarse serrations that grow opposite each other. From July to October, it produces many yellow corymbs of flower heads about 5cm in diameter at the top of the stem. The dwarf pitcheriana species is widely cultivated, but there is also the large-flowered grandiflora species.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

キク科の多年草で，ヒメキクイモともいう。別属の地下に塊茎のあるキクイモに似て，塊茎をもたないところからこの名がつけられた。北アメリカ原産で，オンタリオ，フロリダ，イリノイ州などに分布し，日本へは明治中期に渡来した。草丈1.5mに達し株もとより分枝して叢生（そうせい）して茂り，全株無毛，粗い鋸歯のある卵状の葉を対生する。7月から10月へかけて，茎頂に径5cm前後の黄色頭状花を散房状に数多く咲かせる。矮性のpitcheriana種が多く栽培されるが，大輪のgrandiflora種もある。

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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