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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 Flaveria trinervia ： ウィキペディア英語版 Flaveria trinervia ''Flaveria trinervia'' is a species of flowering plant in the aster family known by the common names clustered yellowtops, speedyweed,〔 and yellow twinstem.〔 It is native to parts of the Americas, including the southeastern and southwestern United States (Florida, Texas, Arizona, New Mexico),〔(Biota of North America Program 2014 county distribution map )〕 most of Mexico, Belize, and parts of the Caribbean,〔 but it is known in many other places as an introduced species and often a noxious weed, such as in Hawaii.〔(Marin Life Photography ) photos in Hawai'i〕〔(Flora of Zimbabwe )〕 ''Flaveria trinervia'' grows easily in many types of wet habitats, including saline and alkaline soils and highly disturbed habitat. This is an annual herb growing erect and known to exceed two meters (7 feet) in height. The lance-shaped to oval leaves are each up to 15 centimeters (8 inches) long and arranged oppositely in pairs around the stem, their bases sometimes fused together. The edges of the leaves generally have tiny widely spaced teeth. The inflorescence is a large dense cluster of many very small flower heads, sometimes over 300 in one cluster. Each flower head contains 0-1 yellow or whitish ray floret and 0-2 yellow disc florets.〔(Flora of North America, ''Flaveria trinervia'' (Sprengel) C. Mohr, 1901. Clustered yellowtops )〕〔(Powell, Albert Michael. 1979. Annals of the Missouri Botanical Garden 65(2): 628-629 ) description and commentary in English, distribution map on page 625〕 This plant exhibits C4 carbon fixation. The Australian species ''F. australasica'' is very similar and possibly closely related to ''F. trinervia.'' Some authors treat the two as distinct species〔(Powell, Albert Michael. 1979. Annals of the Missouri Botanical Garden 65(2): 629-630 ) description and commentary in English〕〔(The Plant List, ''Flaveria australasica'' Hook. )〕 while others consider ''F. australasica'' as a synonym of ''F. trinervia.''〔(Atlas of Living Australia, ''Flaveria trinervia'' (Spreng.) C.Mohr )〕 ==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「Flaveria trinervia」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.