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Rubus racemiger : ウィキペディア英語版 | Rubus racemiger
''Rubus racemiger'' is an uncommon North American species of brambles in the rose family. It grows in the eastern United States, in the Appalachian Mountains of Pennsylvania, Maryland, and West Virginia.〔(Biota of North America Program 2014 county distribution map )〕〔 Bailey, Liberty Hyde 1947. Gentes Herbarum; Occasional Papers on the Kinds of Plants 7(3): 236, figure 76〕 The genetics of ''Rubus'' is extremely complex, so that it is difficult to decide on which groups should be recognized as species. There are many rare species with limited ranges such as this. Further study is suggested to clarify the taxonomy.〔(Flora of North America, ''Rubus'' Linnaeus, 1754. Bramble )〕 ==References==
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