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Chrysogonum virginianum
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Chrysogonum virginianum : ウィキペディア英語版
Chrysogonum virginianum

''Chrysogonum virginianum'' (Golden-knees, Goldenstar, or Green-and-gold) is a North American species of plants in the sunflower family. It is native to the eastern United States from New York State and Rhode Island south to Louisiana and the Florida Panhandle.〔(Flora of North America, ''Chrysogonum'' Linnaeus )〕〔(Biota of North America Program 2014 county distribution map )〕
The species is sometimes grown as a perennial ornamental because of its showy flowers. It is usually propagated by root cuttings.
;Varieties
Formal botanical varieties of wild populations:
* ''Chrysogonum virginianum'' var. ''australe'' (Alexander ex Small) H.E.Ahles - Florida, Georgia, Alabama, Mississippi, Louisiana
* ''Chrysogonum virginianum'' var. ''brevistolon'' G.L.Nesom - Georgia, Alabama, Carolinas, Tennessee, Kentucky
* ''Chrysogonum virginianum'' var. ''virginianum'' - from New York to South Carolina, west to Kentucky + Ohio
''Chrysogonum virginianum'' is an herb up to 50 cm (20 inches) spreading by means of rhizomes. Flower heads are produced singly or in pairs, yellow, with both ray florets and disc florets.〔(Flora of North America, Green and gold, ''Chrysogonum virginianum'' Linnaeus )〕

Image:Green and Gold Chrysogonum virginianum Leaf 3008px.jpg|Leaf closeup
Image:ChrysogonumVirginianum.jpg|A picture of ''Chrysogonum virginianum'' var. ''australe''

==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「Chrysogonum virginianum」の詳細全文を読む



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