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Hazardia whitneyi : ウィキペディア英語版 | Hazardia whitneyi
''Hazardia whitneyi'', Whitney's bristleweed, is a North American species of shrub in the daisy family. It has been found only in the States of Oregon and California in the western United States.〔(Calflora taxon report, University of California, ''Hazardia whitneyi'' (A. Gray) E. Greene, Whitney's bristleweed )〕〔(Biota of North America Program 2014 county distribution map )〕 ''Hazardia whitneyi'' is a perennial herb or subshrub up to tall. The plant produces numerous flower heads in a dense, elongated array at the top of the plant. Each head contains 8-10 disc flowers but no ray flowers. The species sometimes grows on serpentine soils.〔(Flora of North America, ''Hazardia whitneyi'' (A. Gray) Greene, 1896. Whitney’s bristleweed )〕 ;Varieties〔〔 *''Hazardia whitneyi'' var. ''discoidea'' (J.T.Howell) W.D.Clark - no ray flowers - California, Oregon in Klamath Mountains, southern Cascades, and north Coast Ranges *''Hazardia whitneyi'' var. ''whitneyi'' - 5-18 ray flowers per head - California, primarily in Sierra Nevada ==References==
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