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KMID : 0368419990420030199
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Journal of Plant Biology
1999 Volume.42 No. 3 p.199 ~ p.204
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Reexamination of Sectional Classification in Far Eastern Euphorbia Subgenus Esula(Euphorbiaceae) Using Morphological and Phenolic Data
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Park, Ki Ryong
Ahn, Byung Tae/Lee, Kyung Soon
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Abstract
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Reexamining the classification proposed by Hurusawa, the phylogeny of Far Eastern Euphorbia subgenus Esula 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 Eastern Euphorbia 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. Section Decussatae was nested in the paraphyletic sect Esula in all of the analyses, and the relationship of sect Helioscopiae was equivocal among data sets. The disagreement of data sets over the placement of Euphorbia ebracteolata is probably due to a hybrid origin of the species and missing phenolic data for E. pallasii. A sister-group relationship of the Korean endemic E. fauriei with the widespread E. pekinensis was strongly supported by the morphological and phenolic data.
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