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Rubus philadelphicus : ウィキペディア英語版 | Rubus philadelphicus
''Rubus philadelphicus'' is an uncommon North American species of brambles in the rose family. It has been found in the eastern United States, primarily in the Appalachian Mountains of Pennsylvania and West Virginia.〔(Biota of North America Program 2014 county distribution map )〕 ''Rubus philadelphicus'' is an prickly shrub with arching canes, slightly prickly. Fruit is fleshy and by all accounts good-tasting.〔(Blanchard, William Henry 1907. Torreya 7(3): 56–57 )〕 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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