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''Koelreuteria elegans'', more commonly known as flamegold or Taiwanese rain tree, is a deciduous tree to 15-20 metres native to Taiwan. It is widely grown throughout the tropics and sub-tropical parts of the world as a street tree. It flowers in early to mid-summer. Flowers are small, to 20 mm in length, and occur in branched clusters at the stem tips. They are butter-yellow with five petals that vary in length until opening. Each flower contains seven to eight pale yellow stamens with hairy white filaments. The fruit is a brown-purplish three-lobed capsule that splits to reveal a number of black seeds. It is a declared weed in many parts of the world, particularly Brisbane, Australia〔(【引用サイトリンク】 title=Weed Management Guide: Chinese rain tree – Koelreuteria elegans ssp. formosana )〕 and in Hawaii. == References == 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Koelreuteria elegans」の詳細全文を読む スポンサード リンク
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