豫南鸡公山自然保护区种子植物区系的研究

鸡公山是大别山西部余脉,位于豫、鄂两省的交界线上,为国家级自然保护区和风景区。本文根据该区现代植物分布的科、属、种,作了详细的统计分析,并与其它地区的植物区系成分作了对比研究。其结果表明:①植物种类组成丰富,共计有132科、544属、1161种。②鸡公山(大别山)是华东、华中、华北植物区系的交汇之地,各种成分兼容并存。③该区(大别山)是秦岭以东南北植物分布的天然界线,以此为北界的植物有34属、72种,以此为南界的植物有5属16种。④大别山是中国西南成分、华中成分向华东地区扩展散布的北部通道,鸡公山是这条通道上的一个连接点。

A STUDY ON THE SPERMATOPHYTA FLORA IN THE JIGONGSHAN NATURAL SANCTUARY IN SOUTH HENAN

Jigongshan Mountain is the western mountain chain in the Dabie Mountain, located at the boundary between Hubei Province and Henan Province, which is the national natural sanctuary and landscape region.Based on thorough and careful statistical analysis of families, genera and species in the present flora and comparison of the retated regions' floristic elements, the results are shown as follows.1. The plant species and composition are very rich. There are 132 families, 544 genera and 1161 species in the area of 100 square kilometre.2. Jigongshan (Dabieshan)is the area where East China, Central China and North China flora are covcrgent, and various floristic elements are compatible.3. This area is the natural boundary of the plant distribution between subtropicus and warm temperate zone. There are 34 genera and 72 species whose distribution are bounded on north by Dabie Mountains.4. Dabie Mountains is the north passageway of plant spread, where floristic elements can spread from Southwest China and Central China to East China, or from East China to West China and Central China. Jigongshan isthe tie of the passageway.