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''Solidago speciosa'', the showy goldenrod, is a North American species of flowering plants in the sunflower family. It grows in the Province of Ontario in central Canada, as well as in the eastern and central United States (from the Atlantic coast west as far as the Great Plains, so from Maine to Georgia (except Delaware) west as far as Texas, Nebraska, and the Dakotas).〔(Biota of North America Program 2014 county distribution map )〕 ''Solidago speciosa'' is a perennial herb up to 200 cm (80 inches, over 6 feet) tall, producing a thick underground caudex. One plant can produce as many as 5 stems, each with up to 300 small yellow flower heads.〔 ;Varieties〔(Flora of North America, ''Solidago speciosa'' Nuttall, 1818. Showy or noble goldenrod )〕 * ''Solidago speciosa'' var. ''rigidiuscula'' Torr. & A.Gray - mostly in western portions of range * ''Solidago speciosa'' var. ''speciosa'' - mostly in eastern portions of range ==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「Solidago speciosa」の詳細全文を読む スポンサード リンク
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