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''Helianthus maximiliani'' is a North American species of sunflower known by the common name Maximilian sunflower.〔 This sunflower is named for Prince Maximilian of Wied-Neuwied, who encountered it on his travels in North America. ''Helianthus maximiliani'' is native to the Great Plains in central North America, and naturalized in the eastern and western parts of the continent. It is now found from British Columbia to Maine, south to the Carolinas, Chihuahua, and California. The plant thrives in a number of ecosystems, particularly across the plains in central Canada and the United States. It is also cultivated as an ornamental.〔(Biota of North America Program 2014 county distribution map )〕 ==Description== A branching perennial herb, growing from a stout rhizome and reaches heights from 50-300 cm (20-120 inches, or 1.7-10 feet). The slender, tall, erect stems and alternately-arranged leaves are covered in rough hairs.〔(Flora of North America, ''Helianthus maximiliani'' Schrader, 1835. Maximilian sunflower , hélianthe de Maximilien )〕 The lance-shaped leaves are narrow, pointed, folded down the midvein, and up to 30 centimeters (12 inches) long on large plants.〔 The flower heads are surrounded at the base by pointed green phyllaries which often stick straight out and curl at the tips. The center is filled with yellow tipped brown disc florets and the circumference is lined with bright yellow ray florets 2 to 4 centimeters (0.4-1.2 inches ) long.〔 The plant reproduces by seed and by vegetative sprouting from the rhizome.〔 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 maximiliani」の詳細全文を読む スポンサード リンク
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