Study on floristic phytogeography of seed plants in the Pamirs of China

The flora of Pamirs consist of 963 species of seed plants belonging to 59 families and 303 genera. Based on the analysis of the floristic elements at family,genera and species level,there are some conclusions as follows:The floristic elements of the Pamirs of China are complex. Almost all kinds of distribution types are more or less represented here. Among the genera distribution patterns,the floristic elements with 83.8% temperate genera and 4.3% tropical ones reveal dominant temperate property. And in the species distribution patterns,the flostric element with 75.1% temperate species and 1.8% tropical ones indicate that the flora is temperate in nature flora. From the level of families and genera,predominant families are minor-genera family and one-genera family. There are only three numerous-genera family which is more than 20 genera,but the number of genera and species auounts for 35.9% and 38.6% respectively to the total,so phenomenon of the flora is obviously;single-species or minor-species genera is more,the ratio of genera and species is high,so composition of floristic is complex.