甘肃莲花山自然保护区种子植物区系的研究

莲花山自然保护区位于黄土高原向青藏高原过程渡的地带，植物种类丰富，据初步统计，有种子植物９２科，３７９属，９１０种，通过植物区系资料分析，得出以下结论：种类组成比较丰富，地理成分复杂，联系广泛，以温带成分占绝对优势，是典型的北温带性质；该地区是多种植物区系成分的交汇地和区系结，特别是中国－日本及中国－喜马拉雅区系成分的交汇地带和分界线；植物区系隶属于泛北极植物区，中国－喜马拉雅森林植物亚区，横断山

A Study on the Spermatophytic Flora from Lianhua Mountain Nature Reserve in Gansu Province

The L ianhua Mountain Nature Reserve in Gansu province is located in the conflu- ent zone of Loess plateau and Qinghai- Xizang plateau,where the seed plants are relatively abundant in species.According to preliminary statistics,the seed plants in this area com- prise 91 0 species,379genera and 92 families.Through the analysis the preliminary conclu- sions can be drawn:Rich in comprising species,complex in geographical elements,having an extensive connection with nearby floristic areas,but dominating in temperature elements, typical N temperate in nature.This area is a convergent of many floristic elements and a floristic node,in particular convergent region and boundaries of Sino- Japan forest subking- dom and Sino- Himalayan forest subkingdom elements. On the basis of the distribution of endemic species and some physiographical features, the flora belong to the subregion of NW sichuan,S Gansu and SE Qinghai of Hengduan mountain region,Sino- Himalayan forest subkingdon,Holarctic Kingdom.The floristic ele- ments are younger,flora occurred and developed progressively with the rise of Qinghai- Xi Zang plateau initiated by the organic movement of Himalaya in third period.