论河南植物区系的基本特征

Discussion of the basic characteristic of the flora of Henan province

河南省处于我国南北过渡和东西过渡的重要地区,华北、华中和华东等植物地区在此交汇,植物区系成分非常复杂并与周围地区联系广泛。本文在新的资料和研究成果的基础上,概括并论述了河南植物区系的基本特征:(1)植物种类比较丰富,多样性较高;(2)古老成份数量多;(3)地理成分复杂,温带成分略占优势,过渡性突出;(4)中国特有植物比例较高;(5)区域差异显著。

Henan province locates in the eastern-central part of China, transitional zone from temperate to subtropic, from humid to semihumid and semarid, ranging from longitude 110°21′to 116°39′E , latitude 31°23′to 36°22 ′N. The Central China, North China and East China plant Regions connect in here, so its floristic elements are complex .This paper summarizes and discuses the characteristic of the flora of Henan province based on the latest floristic data. The result is as follows: (1)it is rich in flora; (2)there are many families and genera being age-old in origin in it; (3)its geographical elements are complex, but temperate type is the dominant and the character of transition conspicuous in the flora; (4)it is rich in species endemic to chine, ranking the first place in the northern areas in China; (5)the difference between areas is obvious.