中国种子植物杂草分布区类型分析

Study of the areal types of seed weeds in China

在《中国杂草志》记载的基础上,分析了中国种子植物杂草科和属的区系特征。结果表明:中国种子植物杂草有90科571属1412种。其中裸子植物1种,被子植物1411种,隶属于89科570属。科的分布区类型分属6个类型4个变型,以热带分布为主,温带成分占有一定的比例。属的分布区类型隶属于15个类型17个变型,热带成分和温带成分比例大致相等,体现了本区从热带亚热带向温带过渡的性质。世界分布的科属占有较大的比例,这些科属构成了中国种子植物杂草的主体。

Based on Weed Flora d China , this paper analyzed the character of the areal types on seed weeds in China. The results showed that there were 1412 species of seed weeds,which belong to 90 families and 571 genera in China. The areal types of families could be classified into 6 areal types and 4 subtypes.and that of genera belong to 15 areal types and 17 subtypes, in which there were a lot of tropic and subtropical elements. The phenomena that there were some temperate elements showed the transitions of areal-types of seed weeds in China. Widespread families and genera constituted principal part of seed weeds in China.