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Helianthus argophyllus : ウィキペディア英語版 | Helianthus argophyllus
''Helianthus argophyllus'' is a North American species of sunflower known by the common name Silverleaf sunflower. It is native to the coastal regions of the State of Texas in the United States, and naturalized in other places (Florida, North Carolina, Argentina, Africa, Australia, etc.).〔(【引用サイトリンク】title=Biota of North America 2014 county distribution map )〕〔Gibbs Russell, G. E., W. G. M. Welman, E. Retief, K. L. Immelman, G. Germishuizen, B. J. Pienaar, M. Van Wyk & A. Nicholas. 1987. List of species of southern African plants. Memoirs of the Botanical Survey of South Africa 2(1–2): 1–152(pt. 1), 1–270(pt. 2).〕 ''Helianthus argophyllus'' is an annual herb sometimes as much as 300 cm (10 feet) tall. Leaves and stems appear silvery because of a coating of many hairs along the surface. One plant can produce 1-5 flower heads, each 15–20 ray florets surrounding 150 or more disc florets. The plant grows in sandy areas near the seacoast.〔(【引用サイトリンク】title=Flora of North America, ''Helianthus argophyllus'' Torrey & A. Gray, 1842. Silverleaf sunflower )〕 ==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 argophyllus」の詳細全文を読む
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