In this study, the distribution of 8 species and 1 variant of Taraxacum plants （Compositae） were investigated in Matsue area, Shimane Prefecture. All other species except an endemic species of Oki （T. maruyamanum Kitam.） which is sexual diploid, are apogamic polyploids. Comparative researches are carried out using morphological characters such as flower, inflorescence and the bract for identification and the classification of the close relative species. The chromosome numbers were examined for these species； other than the tetraploid（4x）, diploid（2x）, triploid（3x） and pentaploid （5x） were found in the apogamy species, which were T. ceratolepis Kitam.（ 2x, 4x） and T. arakii Kitam. （3x, 4x, 5x）. Furthermore, the genetic variations in these apogamy species were conformed by electrophoretic analysis.