A Preliminary Study on the Seed Plants Flora from Maanshan Nature Reserve in Sichuan

There are 128 families,606 genera,1 551 species and 103 varieties in seed plant flora of Maanshan Nature Reserve in Sichuan province,including 4 families 12 genera 25 species Gymnosperms.The rictmess of relic endemic compositions shows that the seed plants flora in Ma-Reserve is old and primitive.The monotypic and oligotypi,families and genera are rich in the region,meanwhile the families and genera containing more than 20 species are very luxuriant in its flora also.The familie with more than 20 species and less than 10 species genera are the main composition,which is about 3.31%and 68.23%of the total species in the flora.The richiness of varieties shows the higher differentiation of seed plants.The areal-types of families are mainly tropical,but those of genera a typical temperate one.