摘要
根据调查和四川树种名录，统计了在四川自然分布的木本植物１４０４种（含种以下单位），隶属于９６科，３１１属．对区系成分进行了统计分析，结果表明，木本植物科的分布区类型主要以热带－亚热带分布型（２９科占３４．１％）和热带－温带分布型（１７科占２０％）为主．属的分布区类型主要以泛热带（５３属占１７．３％）、热带亚洲（３９属占１２．８％）、北温带（４６属占１５％）和东亚分布（４４属占１４．４％）４种类型为主．四川木本植物区系的基本特征可以归结为：①区系成分复杂，联系较为广泛；②热带、温带成分明显，特有现象显著；③区系起源古老，珍稀濒危和孑遗树种多；④裸子植物种类多；⑤川东、川西替代现象明显．
Based on the investigation and the following book″Enumeration of tree species in Sichuan″,theauthor made the floristic analysis for 1 404 woody plant species or infraspecific taxa of 311 genera in96 families of natural distribution in Sichuan. The results show that:the types of distribution regionof these families are mainly tropical-subtropics(the 29 families make up 34.1%)and tropical-temper-ate(the 17 families make up 20%),the floristic typos of these genera are mainly pantropic(the 53genera make up 17.3%),tropical-Asian(the 39 genera make up 12.8%),north-temperate(the 46genera make up 15%)and east Asian (the 44 genera make up 14.4%)distributions. The floristic fea-tures of xylophyta in Sichuan were concluded as followings:(1)The floristic composition here is complicated and extensively correlated with each other. (2)The tropical ,temporate elements and endemic species are notable. (3 )The flora is ancient origin and therefor with many relic species and rare,endangered treespecies here. (4 )There are abundant gymnospermuus species.(5)The species in E. Sichuan and W. Sichuan can be obviously replaced.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
1995年第6期686-692,共7页
Journal of Southwest China Normal University(Natural Science Edition)
