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Helianthus californicus : ウィキペディア英語版 | Helianthus californicus
''Helianthus californicus'' is a North American species of sunflower known by the common name California sunflower. It is native to California in the United States and Baja California in Mexico, where it grows in many types of habitats.〔(Biota of North America Program 2014 county distribution map )〕〔(Calflora taxon report, University of California, ''Helianthus californicus'' DC., California sunflower ) photos, interactive California distribution map〕〔(SEINet, Southwestern Biodiversity, Arizona Chapter, ''Helianthus californicus'' Nutt. ex Torr. & Gray ) photos, description, interactive distribution map〕 ''Helianthus californicus'' is an erect perennial herb growing from a network of tough, woody roots with small rhizomes. It is a sprawling, gangly plant, sending a thin stem to heights between one and three meters (3-10 feet) or more. The lance-shaped leaves may be 20 centimeters (8 inches) long and are smooth or slightly toothed along the edges. The inflorescence holds several flower heads. Each head is supported by a base covered in long, pointed phyllaries that bend back as the head ages and develops fruit. The flower head has a fringe of golden yellow ray florets, each two or three centimeters (0.8-1.2 inches) long, and a center filled with curly yellow and brown disc florets. The achene is about half a centimeter (1.25 inches) long.〔(Flora of North America, ''Helianthus californicus'' de Candolle 1836. California 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 californicus」の詳細全文を読む
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