Giant cocklebur - Giant cocklebur

...The male flowers are small and borne in panicles at the ends of the branches, while the female flowers are borne in the leaf axils. X. occidentale Bertoloni is larger overall than X. coxbur. The thorny bracts are also 2-2.5cm in diameter, slightly larger than X. coxbur, which is less than 2cm in diameter.

*Some of the terminology that refers to "Oonamomi" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…雄花は枝先に小さく円錐花序につき，雌花は葉腋（ようえき）につく。オオオナモミX.occidentale Bertoloniはオナモミに比べて全体に大きい。とげのある総苞も長径が2～2.5cmで，2cm以下のオナモミよりひとまわり大きい。…

※「オオオナモミ」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