Floristic Analysis on Seed Plants of Tiantai County in Zhejiang Province

Tiantai county lies in central of Zhejiang Province with warmth and humid climax.The seed plants in Tiantai county are very rich.There are 1 710 species(including subspecies) of wild seed plants,belong to 149 families and 729 genera.The dominant families are distinct and there are 22 families with more than 20 species,belong to 400 genera and 993 species.Although they account for only 14.7% in total families,they account for 54.9% and 58.1% in total genera and total species,respectively.The floristic is complex.The oligotypic genera with 5 species and the smallest genera are 677 species and account for 92.9% in total genera.At the family level,the tropic type are dominant,the second is temperate type.At the genus level,the areal types can be divided into 14 kinds.The temperate type is dominant and account for 56.3%.The proportion of tropic type is also high and account for 43.7%.The element of endemic species to china has 14 genera,accounting for 1.9%,among which 14 species belong to the first national protection categories.