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Helenium pinnatifidum : ウィキペディア英語版 | Helenium pinnatifidum
''Helenium pinnatifidum'' is a North American perennial plant in the Sunflower Family, commonly known as Southeastern sneezeweed.〔 It is found in the southeaster United States (Alabama, Georgia, Florida, and the Carolinas).〔(Biota of North America Program 2014 county distribution map )〕 ''Helenium pinnatifidum'' is an perennial herb up to 80 cm (32 inches) tall, with small wings running down the sides of the stems. Leaves are pinnatifid, meaning deeply divided into many small parts. One plant generally produces only 1-3 hemispherical flower heads, about 2 cm (0.8 inches) across. Each head can have 800 or more miniscule disc flowers 4.0–5.5 mm (0.16-0.22 inches) across, each yellow toward the bottom but yellow-brown toward the tip. There are also 13-34 yellow ray flowers, each with three prominent lobes at the tip.〔(Flora of North America, ''Helenium pinnatifidum'' (Schweinitz ex Nuttall) Rydberg 1915. Southeastern sneezeweed )〕 ==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「Helenium pinnatifidum」の詳細全文を読む
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