Flora Research on vascular plants in wetland on the midstream of Heihe River (zhangye section)

The present research studied the flora in wetland on the midstream of Heihe River (zhangye section).The results showed that there were 269 species of vascular plant which belonged to 162 genera in 52 families.There were 3 species of Pteridophyta belonging to 1 genera of 1 family and 266 species of Spermatophyte belonging to 161 genera of 51 families in which there were 2 species gymnosperms including 2 genera and 2 families.The rich number of plants showed the great abundance of plant species in this area.Geographical elements of wetland vascular plan flora analysis showed that there were 6 distributional types and 2 subtypes at the species level and there were 14 distributional types and 8 subtypes at the genera level.The flora dominated by temperate elements with tropical elements as complementary.