Vicia amirensis has pollen grain with swollen mesocipium, terete style, abaxially sproution stylar hairs and globes stigma, differing from other five species, V. amoena, V. Japonica, V. pseudo-orbus, V. ramulifloua, V. unijuga and V. venosa, in sect. Vicilla of Kupicha’s System. This result further support taxonomic treatment V. amurensis proposed by Endo and Ohash. The chromosome numbers of 64 pop ulations and karyotypes of 15 populations for sect. Vicilla and sect. Amurense were observed. V. amurensis and V. pseudo-orbus have similar karyotype features such as the same karyotype symmetry, comparable chromosome size and the same type of Sat-chromosomes, and therefore V. amurensis in sect. Amurense is assumed to be closely related to V. Japonica in sect. Vicilla. The primary study of nuclear DNA amount was carried out on nine populations of six taxa in sect. Vicilla and geographic distribution of different ploidy cytotypes. karyotype, nuclear DNA amount in sect. Vicilla and geographic distribution of different ploidy cytotypes.
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