成都市维管植物杂草分布区类型研究

The Areal Types on Vascular Weeds in Chengdu

在实地调查的基础上,分析了成都市维管杂草科和属的区系特征.结果表明,成都市维管杂草有75科218属310种,其中外来入侵杂草28种.科的分布区类型分别属于6种类型和4种变型,以热带亚热带成分为主,属的分布区类型隶属于14种类型和9个变型,其热带亚热带分布与温带成分基本相等,表现出从热带亚热带向温带过渡的性质.世界分布的杂草构成了成都市维管杂草的主体.

Based on field investigation, this paper analyzes the character of the areal types on vascular weeds in Chengdu area. The results show that there are 310 species of field vascular weeds belonging to 75 families and 218 genera in Chengdu, among which there are 28 alien invasive species. The areal types of families can be classified into 6 areal types and 4 subtypes, in which there are a lot of tropic and subtropical elements. The areal types of genera belong to 14 areal types and 9 subtypes, in which tropic and subtropical elements are nearly equal to temperate elements. The phenomena shows the transition character of areal-types of vascular weeds in Chengdu area. Widespread families and genera are abundant and constituted principal part of vascular weeds in Chengdu area.