西南大学校园种子植物区系组成及特征分析

A Floristic Study of Seed Plants in the Campus of Southwest University

在对西南大学校园种子植物进行拉网式调查、标本采集和鉴定的基础上,对其科、属的分布区类型进行了统计分析,得出其区系特征如下:①种子植物类型较为丰富,区系成分较为复杂.校园共有种子植物125科,452属,671种;其中栽培植物357种,占53.2%;共包含10种科的分布区类型、15种属的分布区类型及变型.②植物区系成分中,以热带成分为主,温带成分也较为丰富,呈现出一定的过渡性.③特有、珍稀濒危及重点保护植物种类较为丰富.④属种系数相对较高,说明其生境较为简单,这与栽培植物的来源多样性密切相关.

Based on the statistics and analysis of areal-types of families,generas,species on the present flora in the campus of Southwest University,the floristic characteristic indicates as follows： ① The floristic components are complex and taxa are abundant.It is now known that there are 671 species（including varieties） of seed plants,which belong to 452 genera and 125 families.② The flora shows a transition which owns an obvious tropic zone character and abundant temperate zone taxa at the same time.③ The endemic,endangered and protected species are very abundant.④ The genera coefficient is 67.36%,which indicates that the advantaged groups are not obvious.It is closely related to the diversity of the source of cultivated plants.