山西历山保护区野生种子植物区系研究

在标本采集、鉴定的基础上,结合相关文献资料,研究了山西历山国家级自然保护区野生种子植物区系组成及其地理成分.结果表明:历山保护区共有野生种子植物1 246种,分别隶属于111科499属,其中裸子植物4科5属8种,被子植物107科494属1 238种(双子叶植物93科399属1 040种,单子叶植物14科95属198种).温带分布成分占绝对优势,其中温带科28科,占总科数的25.23%;温带属337属,占总属数的76.94%,说明本区系具有明显的温带性质.热带科42科,占总科数的37.84%;热带属90属,占总属数的20.53%,表明本区系在发生发展过程中与热带成分相联系的历史渊源.种的分布区类型中,中国特有分布500种所占比例最大,其次是温带亚洲分布和东亚分布.

Analysis on the Flora of Seed Plants in Lishan Nature Reserve,Shanxi

Based on the specimen collection and identification,and referring related literatures,the composition of spermatophyte flora and its geographic elements in Lishan National Reserve,Shanxi were studied.There were 111 families,499 genera and 1 246 species of wild spermatophyte.Among which gymnosperms include 4 families,5 genera and 8 species,and angiosperms include 107 families,494 genera and 1 238 species.The angiosperms are composed of dicotyledonous and monocotyledonous,having 93 families,399 genera and 1 040 species,and 14 families,95 genera and 198 species respectively.In the flora composition,the temperate elements,having 28 families and 337 genera,accounting for 25.23% in total families and 76.94% in total genera(excluding cosmopolitan),occupy a dominant position.This distribution of the flora reflected Lishan National Reserve had the obvious characteristics of temperate flora.While the tropical elements consisted of 42 families and 90 genera,accounting for 37.84% in the total families and 20.53% in the total genera,which indicated the flora had some connection with tropical flora historically.The endemic to China was the largest among all of species elements,consisting of 500 species,and the elements of Temperate Asia and East Asia were on second and third place.