太行山脉东坡中南段种子植物区系初步分析

太行山脉东坡中南段分布有种子植物106科、464属、942种.对该地区种子植物区系进行了统计分析,结果表明:(1)本地区种子植物种类不丰富,有裸子植物2科,4属,5种;单子叶植物16科,88属,173种;双子叶植物88科,372属,764种.(2)属的地理分布类型多样,有15个分布类型及12个变型.其中温带成分占73.25%,具有明显的优势.热带成分占23.75%.(3)古老、残遗、原始成分较多,反映该地区植物区系具有一定的古老性.(4)有中国种子植物特有属12属,国家级保护植物11种.分析认为该地区是华北植物区系的重要组成部分.

A floristic analysis of the seed plants in the middle-south area of east slope of Taihang Mountains

There are 942 species seed plants belong to 464 genera in 106 families in the middle-south area of east slope of Taihang Mountains. Based on the statistics and analysis the results were as follows: (1)It is needy in number of seed plants which include 2 families, 4 genera and 5 species of gymnosperms; 16 families, 88 genera and 173 species of monocotyledon; 88 families, 372 genera and 764 species of dicotyledon. (2)There are 15 areal-types of genera of seed plants and 12 subtype in this region. It has 73.25% of various temperate areal-types and 23.75% of tropical elements. So that, analysis shows that the temperate floristic elements are predominant in this area. (3)There are large proportion of archaic, relic and primitive plants in this area. This result shows clearly the ancient nature of this flora. (4)There are 12 genera Chinese endemic genera of seed plants and 11 species rare endangered plant. These analysis results showed that this region is an important composition of North China Region plant flora.