...The ornamental Tithonia is the Mexican sunflower ( T. rotundifolia Blake). This wild species grows to over 2m in height, but the cultivated variety, Torch, grows to an upright stem about 1m in height. It has broad ovate leaves, blooms early, and in summer produces coarsely branched, scarlet-orange sunflower-like flowers that grow singly at the ends of the branches. ... *Some of the terminology explanations that mention "Torch" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…観賞用に利用されるチトニアは,それらのうちのメキシコヒマワリ(ヒロハヒマワリ)T.rotundifolia Blake(英名Mexican sunflower)である。この野生系統は高さ2mをこえるが,栽培されるのはその改良種トーチTorchで,茎は直立し,高さ1mほど。葉は広卵形,早咲きで,夏には粗く分枝して緋橙色のヒマワリに似た花を枝端に単生する。… ※「Torch」について言及している用語解説の一部を掲載しています。 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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