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Cirsium brevifolium : ウィキペディア英語版 | Cirsium brevifolium
''Cirsium brevifolium'' is a North American species of plants in the thistle tribe within the sunflower family. Common name is Palouse thistle . The species is native to the northwestern United States, in the States of Washington, Oregon, and Idaho.〔(Biota of North America Program 2014 county distribution map )〕 The plant is particularly common in the Palouse Prairie near Pullman, Washington.〔(photo of herbarium specimen at Missouri Botanical Garden, collected near Pullman, Washington, isotype of ''Cirsium brevifolium'' )〕〔(Piper, Charles Vancouver 1906. Contributions from the United States National Herbarium 11: 610–611 ) as ''Carduus palousensis''〕 ''Cirsium brevifolium'' is a perennial herb up to 120 cm (4 feet) tall, with a large taproot. Leaves have spines along the edge. Sometimes there is only one flower head, sometimes a few but not many, with creamy white or pale lavender disc florets but no ray florets.〔(Flora of North America, Palouse thistle , ''Cirsium brevifolium'' Nutt. )〕 ==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 brevifolium」の詳細全文を読む
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