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Ambrosia bidentata : ウィキペディア英語版 | Ambrosia bidentata
''Ambrosia bidentata'' (lanceleaf ragweed) is a North American species of plants in the sunflower family. It is native to the central and eastern parts of the United States, primarily the Mississippi Valley and the eastern Great Plains.〔(Biota of North America Program 2014 county distribution map )〕 ''Ambrosia bidentata'' is an annual herb up to 100 cm (40 inches) tall. Leaves have only a few lobes compared to the complexly divided leaves of some related species, sometimes no lobes at all. Flower heads are small and inconspicuous, as the plant is wind-pollinated. The heads develop into spiny burs as the seeds ripen.〔(Flora of North America Vol. 21 Page 15 ''Ambrosia bidentata'' Michaux, Fl. Bor.-Amer. 2: 182. 1803. )〕 ==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「Ambrosia bidentata」の詳細全文を読む
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