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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 decapetalus ： ウィキペディア英語版 Helianthus decapetalus ''Helianthus decapetalus'' (known by the common name thinleaf Sunflower), is a perennial forb in the sunflower family. It is native to the eastern and central United States and Canada, from New Brunswick west to Iowa, Wisconsin, and Ontario, south as far as Georgia and Louisiana.〔(Biota of North America Program 2014 county distribution map )〕〔(【引用サイトリンク】url=http://plants.usda.gov/core/profile?symbol=HEDE ) USDA, NRCS. 2014. The PLANTS Database (http://plants.usda.gov). National Plant Data Team, Greensboro, NC 27401-4901 USA.〕 It produces yellow composite flowers in late summer or early fall. The name ''decapetalus'' means "with ten petals," referring to the 8-12 ray florets on the flower heads, resembling petals. ==Description== The smooth slender stem of ''Helianthus decapetalus'' is 60 to 200 centimeters (2 to almost 7 feet) tall and branched near the top. The ovate or lanceolate leaves are borne on 2 to 5 centimeter long petioles and have serrated edges. They are 7 to 21 centimeters long and 4 to 10 centimeters wide. ''Helianthus decapetalus'' has 3 to 10 flowerheads. Each flowerhead is composed of 21 to 50 disk florets, and 8 to 12 ray florets, which are 2 to 2.5 centimeters long. The bracts are typically 11 to 16 millimeters long, surpassing the flower disk by at least half their length. The fruit are 3.5 to 5 millimeter long cypselae with a pappus of two scales.〔Britton, Nathaniel Lord & Brown, Addison (1913). (''An Illustrated Flora of the Northern United States, Canada and the British Possessions: From Newfoundland to the Parallel of the Southern Boundary of Virginia, and from the Atlantic Ocean Westward to the 102d Meridian, Volume 3.'' ), p. 484. Charles Scribner's Sons, New York.〕〔(【引用サイトリンク】url=http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242416629 ) 'eFloras (2008). Published on the Internet (http://www.efloras.org). Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.〕〔(【引用サイトリンク】url=https://gobotany.newenglandwild.org/species/helianthus/decapetalus/ ) Copyright © 2011-2013 New England Wild Flower Society (http://www.newenglandwild.org)〕 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 decapetalus」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.