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Encelia virginensis : ウィキペディア英語版 | Encelia virginensis
''Encelia virginensis'' is a North American species of flowering plants in the daisy family known by the common name Virgin River brittlebush. This shrub is native to the southwestern United States and northwestern Mexico, particularly the Mojave Desert and the Sonoran Desert. It has been found in Baja California, southern California, Nevada, Arizona, southwestern Utah, and southwestern New Mexico.〔(Biota of North America Program 2014 county distribution map, ''Encelia virginensis'' )〕 ''Encelia virginensis'' is a bushy, sprawling shrub reaching heights between 100-150 cm (40-60 inches). It has many branches, with the younger parts hairy and the older stems developing a thickened bark. The gray-green, fuzzy to hairy foliage may be sparse, appearing pale because of the presence of many small hairs on the surface. Atop many erect, hairy stems are solitary daisy-like flower heads with 11 to 21 ray florets which are generally yellow, and a center of yellow disc florets. The fruit is an achene 5 to 8 millimeters long and usually lacking a pappus.〔(Flora of North America, ''Encelia virginensis'' A. Nelson )〕〔(Nelson, Aven 1904. Botanical Gazette 37(4): 272–273 )〕 ;Varieties *''Encelia virginensis'' var. ''actonii'' (Elmer) B.L.Turner - California, Nevada, Baja California〔(Biota of North America Program 2014 county distribution map, ''Encelia actoni'' )〕〔(Calflora taxon report, University of California, ''Encelia actoni'' Elmer, Acton brittlebush )〕〔(Flora of North America, Encelia actoni Elmer )〕 *''Encelia virginensis'' var. ''virginensis'' - southern California, Nevada, Arizona, southwestern Utah, and southwestern New Mexico〔〔(Calflora taxon report, University of California, ''Encelia virginensis'' Nelson, Virgin River brittlebush )〕 ==References==
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