Reexamination of sectional classification in far easternEuphorbia subgenusEsula (Euphorbiaceae) using morphological and phenolic data |
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Authors: | Ki-Ryong Park Byung-Tae Ahn Kyung-Soon Lee |
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Institution: | (1) Department of Biology, Kyung-Nam University, 449 Wolyoung-dong, 631-701 Masan, Korea;(2) College of Pharmacy, Chung-Buk National University, 360-763 Cheongju, Korea |
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Abstract: | Reexamining the classification proposed by Hurusawa, the phylogeny of Far EasternEuphorbia subgenusEsula was analyzed using thirteen morphological and seventeen phenolic compound data. These data were analyzed independently and
in combination using PAUP under the assumptions of Fitch parsimony. Ten species, comprised of three sections and five subsections
within Far EasternEuphorbia subg.Esula and one outgroup from subg.Chamaesyce, were used as terminal taxa. The phylogenetic results did not support the sectional classifications within subg.Esula proposed by Hurusawa. SectionDecussatae was nested in the paraphyletic sectEsula in all of the analyses, and the relationship of sectHelioscopiae was equivocal among data sets. The disagreement of data sets over the placement ofEuphorbia ebracteolata is probably due to a hybrid origin of the species and missing phenolic data forE. pallasii. A sister-group relationship of the Korean endemicE. fauriei with the widespreadE. pekinensis was strongly supported by the morphological and phenolic data. |
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Keywords: | Euphorbia morphological data phenolic data phylogeny subg Esula |
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