槭树科的地理分布

槭树科是北温带分布的科，２属２０２种。本文论述了本科的植物生态学、科的地理分布、槭属的亚属和组系统位置及其分布式样和种的分布，以及对古特有种、新特有种的分析，认为北温带分布的槭树科是热带起源的，其分布中心和祖型都在中国亚热带山地－横断山区连同湖北、湖南和四川东部。在这里，特别在横断山区槭树科种类丰富、分布集中，古特有和新特有成分均多，分化明显，是新老区的结合及分布中心，而且很有可能是槭树科的起源地

PHYTOGEOGRAPHY OF THE FAMILY ACERACEAE

The family Aceraceae, with 2 genera and about 202 species, is an important family in temperate forests of North hemisphere. Ecology and distribution of the family and systematic relationships among subgenera and sections of the genus Acer are discussed on present paper. It is concluded that Aceraeeae is originated from the tropical area based on analysis of paleoendemics and neoendemics though the family distributed in north temperate. The ancestral forms and both paleoendemics and neoendemics of the family are concentrated in Hengduan mountains, China. And this area is also rich in spotes and veriety and conjuction with paleoendemics and neoendcmics. It is probably that would been an origin place of Aceraceae.