北京喇叭沟门林区维管植物区系分析

喇叭沟门林区是北京市植物种类最丰富的地区之一 ,现有维管植物 6 5 5种、1 3变种及变型 ,隶属于 1 0 2科、36 7属 ,其植物区系在北京地区具有一定的重要性及特殊性 .科、属分析表明该区与北京维管植物分类群结构基本一致 ,维管植物有半数集中于一些世界性大科之中 .以草本植物占优势的植物生活型反映了本区由暖温带向温带过渡的气候特征 .属的分布区类型表明了该区系的温带性质 ,并反映了该区系形成过程中与热带区系的历史渊源以及与东亚区系之间较紧密的联系

Analysis on the flora of the vascular plants from Labagoumen forest region in Beijing

There are 668 species (including 13 varieties and forms) in 102 families and 367 genus of vascular plants in Labagoumen forest region which is among the places abound with plant species in Beijing, the flora is important and particular to Beijing region. The analysis of families and genus indicates that the structures of corresponding class communiy of vegetables both in Labagoumen and Beijing are identical basically, half of the vascular plants belonges to some worldwide families which have plenty of species, The living types dominated by grass show the climate feature of the transition of worm temperate zone to temperate ones; The areal types of the genus indicate that the flora of this region is characterized by its temperate nature and the historical origins to the tropical areal types in its forming course. Also, the flora has a relatively close relation to the East Asia flora.