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Bidens vulgata
''Bidens vulgata'' is a species of flowering plant in the daisy family known by the common name big devils beggartick. It is native to eastern and central North America from Nova Scotia to northern Georgia and as far west as the Rocky Mountains. It is an introduced species on the West Coast of North America as well as parts of Europe.〔(Biota of North America Program 2014 county distribution map )〕〔(Altervista Flora Italiana, Forbicina comune, ''Bidens vulgata'' Greene )〕
''Bidens vulgata'' is an annual herb producing a hairy stem which generally grows tall but often grows much taller, exceeding . The leaves are made up of several lance-shaped leaflets each up to 8 centimeters long. The inflorescence produces several small flower heads with centers of yellow disc florets and a fringe of 3 to 5 yellow ray florets a few millimeters in length. Some heads lack ray florets. The fruit is a flattened achene with two sharp barbs at one end. The species grows primarily in wet locations such as swamps, marshes, streambanks, etc.〔(Flora of North America, ''Bidens vulgata'' Greene, Pittonia. 4: 72. 1899. )〕〔(Greene, Edward Lee 1899. Pittonia 4(21A): 72 ) as ''Bidens vulgatus''〕
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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