Study on Floristic Phytogeography of Seed Plants in the Pamirs of China

The flora of Pamirs consist of 963 species of seed plant belonging to 59 families and 303 genera. Based on the analysis of the floristic elements at family, genera and species level,some conclusions were obtained 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 indicates that the flora is temperate flora in nature. From the level of families and genera, predominant families are minor-genera family and one-genera family. While numerous-genera family which is more than 20 genera are only 3 families but belong to their genera and specie have about 35.9%,38.6%, so phenomenon of the floristic is obvious. There are more single-species or minor-species genera and the ratio of genera to species is high, showing that composition of floristic is complex.