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Eupatorium semiserratum
''Eupatorium semiserratum'', commonly called Smallflower thoroughwort,〔 is a North American plant species in the sunflower family. It is native to the southeastern and south-central United States, found in all the coastal states from Maryland to Texas and inland as far as Missouri and Kentucky.〔(Biota of North America Program 2014 county distribution map )〕
''Eupatorium semiserratum'' stems sometimes more than 100 cm (40 inches) tall and are produced from short rhizomes. The inflorescences are composed of a large number of small white flower heads with 5 disc florets but no ray florets. This species is similar to ''Eupatorium linearifolium'' but has smaller heads of flowers and stems which branch near the tips rather than near the base.〔(【引用サイトリンク】 Eupatorium )〕 The plants previously known as ''Eupatorium glaucescens'' or ''Eupatorium cuneifolium'' are now classified as ''E. semiserratum'' or ''E. linearifolium''.〔(【引用サイトリンク】 url = http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066738 )〕〔(【引用サイトリンク】 ''Eupatorium semiserratum'' )〕
Another related species is ''Eupatorium lancifolium'', which is found in Alabama, Arkansas, Louisiana, and Texas, and which has sometimes been classified as part of ''E. semiserratum''.〔(【引用サイトリンク】 ''Eupatorium lancifolium'' )〕
==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「Eupatorium semiserratum」の詳細全文を読む
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