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Cirsium drummondii : ウィキペディア英語版 | Cirsium drummondii
''Cirsium drummondii'', called Drummond’s thistle or dwarf or short-stemmed thistle, is a North American species of plants in the thistle tribe within the sunflower family. The species is native to central and western Canada, in every province from Ontario to British Columbia, plus the Northwest Territories.〔(Biota of North America Program, 2014 state-level distribution map )〕 In the United States, it has been found only in the Black Hills of Wyoming and South Dakota.〔(Biota of North America Program, 2014 county distribution map )〕 ''Cirsium drummondii'' is a biennial or perennial herb up to 110 cm (44 inches) tall, blooming only once before dying. Leaves have thin spines along the edges. There is sometimes only one flowering head per plant, but simetimes several, with purple (rarely white) disc florets but no ray florets.〔(Drummond’s or dwarf or short-stemmed thistle, Flora of North America, ''Cirsium drummondii'' Torrey & A. Gray )〕 ==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「Cirsium drummondii」の詳細全文を読む
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