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Rubus segnis : ウィキペディア英語版 | Rubus segnis
''Rubus segnis'' is an uncommon North American species of flowering plant in the rose family. It grows in eastern Canada (all 3 Maritime Provinces) and the northeastern United States (Maine, New Hampshire, Vermont, Massachusetts). Nowhere is it very common.〔(Biota of North America Program 2014 county distribution map )〕〔Bailey, Liberty Hyde 1941. Gentes Herbarum; Occasional Papers on the Kinds of Plants 5(2): 84〕 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 )〕 Some studies have suggested that ''R. segnis'' may have originated as a hybrid between ''R. flagellaris'' and ''R. hispidus.''〔(Flora of North America, ''Rubus hispidus'' Linnaeus, 1753. Bristly or swamp dewberry, ronce hispide )〕 ==References==
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