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Reconsideration of Prunus sargentii complex in Korea - with respect to P. sargentii and P. takesimensis -  

Chang, Chin-Sung (The Arboretum and Department of Forest Resources, Agriculture and Life Sciences, Seoul National University)
Choi, Ho (The Arboretum and Department of Forest Resources, Agriculture and Life Sciences, Seoul National University)
Chang, Kae-Sun (The Arboretum and Department of Forest Resources, Agriculture and Life Sciences, Seoul National University)
Publication Information
Korean Journal of Plant Taxonomy / v.34, no.3, 2004 , pp. 221-244 More about this Journal
Abstract
Prunus sargentii complex of subgenus Cerasus is an Eastem Asiatic plant group that exhibits a broad range of morphological variation and includes P. takesimensis, P. yedosensis, P. verecunda, and P. sargentii. In this study, a morphological analysis was undertaken to determine whether the observed morphological variation was primarily attributable to morphological discontinuities among the taxa. P. sargentii, which distributed eastem area in Korea, northern area in Japan and far east Russia had umbel like inflorescence and additionally was characterized by sticky bud and leaf twigs, compared with P. serrulata complex. Also, P. verecunda in Korea and Japan was characterized by umbel like inflorescence and presence of hair in leaf, petiole and pedicel, and was treated as a variety of P. sargentii. Evidence obtained from multivariate morphometric analyses indicated that the entity of P. takesimensis formed a cohesive group somewhat distinct from P. sargenti.. Especially, P. takesimensis was characterized by relatively small flowers (26-32mm in diameter) and many flowers [(2)3-5] per umbel inflorescence, compared with P. sargentii (34-48mm and 2(3) per inflorescence) and should be recognized as an independent and endeImic taxon in Korea. Additionally, P. yedosensis, which was known to have umbel inflorescence (short peduncle type) with pubescent style based on the type specimen, was comprised of corymb inflorescence (long peduncle type) as well. The morphological differentiation between these two types of P. yedosensis was not considered sufficient to warrant recognition of specific status because of the putative hybrid origin, no distinctive geographical distribution pattern, and existence of various peduncle length on Island Jeju-do of Korea.
Keywords
endemic species; morphometric analysis; principal components analysis; Prunus sargentii; Prunus sargentii var. verecunda; P. takesimensis;
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