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Cirsium nuttallii : ウィキペディア英語版 | Cirsium nuttallii
''Cirsium nuttallii'', called Nuttall’s thistle, is a North American species of plants in the thistle tribe within the sunflower family. The species is native to the coastal plain of the southeastern and south-central United States, from eastern Texas to southeastern Virginia.〔(Biota of North America Program 2014 county distribution map )〕 ''Cirsium nuttallii'' is a biennial or perennial herb up to 350 cm (almost 12 feet) tall, with a large taproot. Leaves are up to 60 cm (24 inches) long with thin, green on the upper side but gray to white on the underside because of numerous woolly hairs; spines along the edges of the leaves. There are a few flower heads, each head with white, pink, purple or lavender disc florets but no ray florets.〔(Flora of North America, Nuttall’s thistle, ''Cirsium nuttallii'' de Candolle )〕 ==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 nuttallii」の詳細全文を読む
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