Floristic Compositions of Spermatophyte in Bailangshan Natural Reserve and the Similarity with Other Mountains

In this paper,the floristic relationships between Bailangshan and other flora were analyzed.Based on Plot survey,floristic spectrum,cluster analysis and principal coordinates analysis(PcoA),I investigated the elements of seed plants in Bailangshan and the similarity of others flora.The results showed that:(1)it is abundant in wild species in Bailangshan,the types of distribution are various and complex.790 species in101families and 394 genera were identified,Angiosperm accounted for 98.35% of the total of seed plants.It is notable in dominant family phenomenon,Oligotypic and monotypic genera are abundant,which show some relict.(2)A total of 273 temperate areal-types that accounted for 81.3% of seed plants genera,The types of geographical distributing composition are various and complex,temperate floral elements are dominant,which have something in common with tropical flora.The present data indicated Bailangshan should belong to North China flora and the region should belong to the East Asia zone representing the feature of transition from warm temperate to temperate areal-types.(3)Floristic correlation between Bailangshan and Nuluerhushan,Donglingshan are significant at the 0.01 level,and the coefficients are 0.999 and 0.998,respectively.Based on two-dimensional scatter plot of PcoA and dendrogram based on the floristic spectrum,the similarities were obvious between Bailangshan and Nuluerhushan,Xiaowutaishan,Donglingshan and Wulingshan of the 12 moutains in this study.The hydrothermal and heterogeneous condition is an impor-tant determining factor in geographical distribution pattern.