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Gamochaeta argyrinea
''Gamochaeta argyrinea'', called silvery cudweed〔 or silvery everlasting, is a North American species of flowering plant in the sunflower family. It is widespread across the southeastern and south-central United States from Delaware south to Florida and west as far as southeastern Kansas and central Texas. It has also been found in Puerto Rico and in northern California (probably introduced).〔(Guy L. Nesom 2004. New distribution records for ''Gamochaeta'' (Asteraceae: Gnaphalieae) in the United States. Sida 21(2): 1175–1185. )〕〔(Biota of North America Program 2014 county distribution map )〕〔(Calflora taxon report, University of California, ''Gamochaeta argyrinea'' G.L. Nesom )〕
''Gamochaeta argyrinea'' is an annual herb up to tall. Leaves are up to long, green on the top but appearing silvery on the underside because of many woolly hairs. The plant forms many small flower heads in elongated arrays. Each head contains 4-6 purple or yellow-brown disc flowers but no ray flowers.〔(Flora of North America, Gamochaeta argyrinea G. L. Nesom, 2004. Silvery cudweed )〕〔(Nesom, Guy L. 2004. Sida 21(2): 717-741 ) in English with summary in Spanish; Latin diagnosis on page 721, photos of herbarium specimens on pages 719-720, color photos of flower heads and line drawings of phyllaries on page 723, county-level distribution map on page 731〕
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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