【摘要】 在野外实地调查的基础上,利用典型样地取样法,对虞山森林植被进行研究(常熟虞山地区共有种子植物101科270属406种)。对虞山种子植物区系组成进行分析表明,虞山种子植物科的成分以热带起源为主,同时也体现了该地区植物南北过渡交汇的特征。就属的分布区类型而言,温带分布类型最多(75属),占总属数的54.07%;其次是热带分布(49属),占总属数的30.0%。说明温带类型在这里得到了良好发育,成为种子植物群落的主要成分。更多还原

【Abstract】 In virtue of Relevé method,a systematic vegetation survey was conducted in Yushan of Changshu,Jiangsu Province.There are 406 species of seed plants there,which belong to 101 families and 270 genera.The analysis of seed plants families in Yushan of Changshu shows that tropic elements are dominant and the plants display a characteristic of transition and blending.With relation to the areal-types of seed plants genera,the temperate areal-types are the most(75 genera),which account for 54.07%of total genera;and the tropic areal-types are the next(49 genera),which account for 30.0% of total genera.This shows that the former are full developed and becomes the dominant elements of seed plants.更多还原