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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Acamptopappus sphaerocephalus ： ウィキペディア英語版 Acamptopappus sphaerocephalus ''Acamptopappus spaerocephalus'' is a species of flowering plant in the aster family known by the common name rayless goldenhead. It is native to the southwestern United States, where it occurs in southern California, southern Nevada, southern Utah, and Arizona.〔(Biota of North America Program 2014 county distribution map )〕 This shrub or subshrub produces an upright, branching stem with shreddy whitish or gray bark. It approaches one meter in maximum height but generally grows to 20 to 40 centimeters. The gray-green leaves are linear or lance-shaped and are arranged alternately, sometimes growing in small clusters. They are hairless or have small, rough hairs. The inflorescence is a solitary flower head or a small cluster of heads. The head is hemispherical or spherical in shape. It has yellow disc florets and no ray florets. The fruit is an achene tipped with thick scales and bristles.〔(''Acamptopappus sphaerocephalus''. ) Jepson Manual Treatment.〕〔(''Acamptopappus sphaerocephalus''. ) Flora of North America.〕〔Griffith, Randy Scott. 1991. (''Acamptopappus sphaerocephalus''. ) In: Fire Effects Information System, (). U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory.〕 This plant grows in the deserts of the southwestern United States, especially the Mojave Desert. It is also present in the southern Great Basin and the northern Sonoran Desert. It grows in desert washes and on plains, mesas, and ridges. It is a member of several plant communities in pinyon-juniper woodlands, mesquite, creosote, and grassy shrubsteppe. It may be associated with catclaw acacia (''Acacia greggii''), California juniper (''Juniperus californica''), scrub oak (''Quercus turbinella''), Joshua tree (''Yucca brevifolia''), California buckwheat (''Eriogonum fasciculatum''), golden cholla (''Opuntia echinocarpa''), and Mojave yucca (''Y. schidigera'').〔 ==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「Acamptopappus sphaerocephalus」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.