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Cirsium pumilum : ウィキペディア英語版 | Cirsium pumilum
''Cirsium pumilum'', called Pasture thistle, is a North American species of plants in the thistle tribe within the sunflower family. The species is native to the northeastern and north-central United States as well as to the Canadian Province of Ontario.〔(Biota of North America Program 2014 county distribution map, ''Cirsium pumilum'' )〕〔(Biota of North America Program 2014 county distribution map, ''Cirsium hillii'' )〕 ''Cirsium pumilum'' is a biennial or perennial herb up to 100 cm (40 inches) tall, blooming once before dying. It has leaf blades up to 30 cm (12 inches) long, with slender to stout spines. There are usually a few flower heads, sweetly scented, with pink, purple or white disc florets but no ray florets.〔(Flora of North America, Pasture thistle, ''Cirsium pumilum'' (Nuttall) Sprengel, Syst. Veg. 3: 375. 1826. )〕 ;Varieties〔 * ''Cirsium pumilum'' var. ''hillii'' (Canby) B. Boivin - Great Lakes region, upper Mississippi Valley〔 * ''Cirsium pumilum'' var. ''pumilum'' - northeastern + east-central United States from Maine to South Carolina west to Ohio〔 ==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 pumilum」の詳細全文を読む
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