河南木本植物区系的研究

THE FLORA OF XYLOPHYTA IN HENAN

本文经对河南木本植物科、属、种各地理成分统计分析及区系起源、形成和演化探讨,其区系特性:1.地理成分复杂,联系广泛,以温带性质为主兼具相当的中国特有和热带成分;2.南北、东西成分兼容并存、交错过渡;3.该区系西—南部地区与秦岭—大巴山,华中及西南区系联系密切,而北部地区显示华北区系特色;4.该区系具有第三纪残遗性质;5.豫西—南山地是保存古残遗和产生新温性特有植物的重要区域。

Henan located in the special geographic position with a complex topography, had experienced great changes in the course of geological time and several vicissitudes in its flora elements, being rich in xylophyta species. Based on the statistical analyses to the geographical elements of families, genera and species and the studies on the origin and development of the flora, this paper conclude the flora feature as follows:1. The geographical elements are complex and basically characterized by temperate nature, furthermore, there exist a lot of tropical and chinese endemic elements. 2. It is an inclusive and alternating transitional flora from south to north and east to west.3.The west-south of Henan closely relates to the flora of south -west,central China and Qinling-Daba mountains system, the north possesses the north china flora features. 4.Th eflora possesses the relict feature of Tertiary Period.5.The west-south mountain land of Henan is the important region preserving the palaeo-relict plants and inducting the temperate natural endemic plants.