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Rubus curtipes : ウィキペディア英語版 | Rubus curtipes
''Rubus curtipes'', the shortstalk dewberry, is an uncommon North American species of flowering plant in the rose family. It grows in scattered locations in the northeastern and north-central United States from Massachusetts west to Minnesota and south to Tennessee, but nowhere is it very common..〔(Biota of North America Program 2014 county distribution map )〕〔Bailey, Liberty Hyde. 1943. Gentes Herbarum; Occasional Papers on the Kinds of Plants 5(5): 362, figure 160〕 ''Rubus curtipes'' is a prickly perennial with biennial canes. First-year canes are arching, sometimes rooting the tips. Leaves on first-year canes are palmately compound with 3 or 5 leaflets. Second-year canes are low-arching, sometimes trailing along the ground, with some simple (non-compound) leaves mixed with some compound leaves with 3 leaflets. Flowers are in flat-topped arrays.〔(Mark P. Widrlechner. 1993. The Genus ''Rubus'' L. in Iowa. Castanea, Vol. 63, No. 4 (December 1998), pages. 415-465 ) description of and commentary on ''Rubus curtipes'' on pages 434-435, global distribution map on page 433〕 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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