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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Helianthus ciliaris ： ウィキペディア英語版 Helianthus ciliaris ''Helianthus ciliaris'' is a species of sunflower known by the common names Texas blueweed and yerba parda. ''Helianthus ciliaris'' grows in much of the south-central and southwestern United States (from Texas north to Kansas and west to California)〔(Biota of North America Program 2014 county distribution map )〕 and northern Mexico (from Tamaulipas west to Sonora and south to Durango and San Luis Potosí),〔 but it can be found elsewhere in North America where it is an introduced species and often a noxious weed.〔(Calflora taxon report, University of California, ''Helianthus ciliaris'' DC., Texas blueweed, blueweed )〕〔(Washington State Noxious Weed Control Board )〕 It is weedy even in much of its native range, growing readily in disturbed areas, on cultivated land, and along the roadside. It grows well in moist areas such as drainage ditches.〔 ''Helianthus ciliaris'' is a perennial herb with distinctive blue-green foliage growing to heights of 40 to 70 centimeters (16-28 inches). It has a tough, horizontally spreading root system which sprouts new plants at distances from the parent, and can also sprout after being fragmented, so plowing the plant under can actually help it spread. The leaves are variable in size, shape, and arrangement, but are generally narrowly lance-shaped and wavy with rough hairs along the edges. The inflorescence holds a mass of at least 35 yellow-tipped red disc florets often surrounded by a fringe of 10-18 curling yellow ray florets, although some heads lack ray florets.〔(Flora of North America, ''Helianthus ciliaris'' de Candolle 1836. Blueweed, blueweed sunflower, Texas blueweed )〕 ==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「Helianthus ciliaris」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.