Abstract: In this study, 23 OTU’s including all the species of Viola in Hebei Provin- ce were used in numerical taxonomic treatment. According to the principle of clustering line method, a few lines which divide sections, subsections and species were respectively decided. The result of numerical research roughly coincides with the scheme of 3 sections and 4 subsec- tions proposed by Gingins et al.. Based on the value of distance coefficient, morphological characters and geographical distribution, the species V. pekinensis is reduced as a synonym of V. mongolica. The writer compared section Melanium with other sections with characters of morphology, palynology, cytology, phytogeography as well as pollination ecology and sugges- ted a revision of systematic position of section Melanium.

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