Abstract: Based on investigation and statistical analysis, the geographical elements of seed plant in Pan’an County, Zhejiang Province were studied in the present paper. There are 1 298 species of wild seed plants (including varieties) belonging to 627 genera, 144 families in Pan’an County. There are 14 distribution area types and 15 sub-types at genus level, and the flora is related with every part of the world, especially closely related with North America and Japan. The genera of tropical distribution account for 36.20% of overall genera, the genera of temperate distribution account for 51.20% of overall genera, and endemic to China distribution for 1.91%, showing that the region should belong to the East Asia zone and represent to the feature of transition from warm temperate to subtropics area-type. At last, two-dimensional scatter plot of principal coordinates analysis (PCO) and clustering tree of between-groups linkage on the basis of the floristic spectrum (FS) of Pan’an and other twenty-one seed plant flora are drown. The result shows that the combining analysis of the two methods can objectively reflect the similarities of different flora.

Key words: seed plants, flora, geographical elements, similarity relationship, Pan&rsquo, an