浙江省天台县种子植物区系分析

天台县位于亚热带中部,气候温暖湿润,植物种类丰富。据统计,约有种子植物149科,729属,1 710种(含种以下分类单位)。该区系中优势科明显,20种以上的科有22个,含400属993种,虽然只占科总数的14.7%,但占总属数54.9%和总种数的58.1%。本区系植物成分较为复杂,5种以下的小属和极小属共677个,占属总数的92.9%。科的分布区类型以热带成分为主,其次是温带成分。属的分布区类型可划分为14类,以温带性成分为主,占56.3%,热带性成分的比例也较高,占43.7%,中国特有属共14个,占1.9%。列为国家首批保护的珍稀濒危植物14种。

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.