Floristic characteristics of Hunan Baojing Youshui National Wetland Park
In order to investigate the flora characteristics of Hunan Baojing Youshui National Wetland Park and provide reference for the protection and development of plant resources in the park,the plants in Youshui National Wetland Park were investigated and analyzed through field investigation and specimen collection.The results showed that there were 1 866 species of vascular plants in the park,belonging to 191 families and 832 genera.The dominant families were Gramineae,Compositae,Legumes,Roseaceae and Labiaceae,and the dominant genera were Rubus,Viburnum,Clematis,Elatostema and Polygonum.In terms of family distribution types,the tropical distribution of the flora in Youshui National Wetland Park accounted for 63.57%of all non-world distribution families,and the pantropical distribution was dominant,while the temperate distribution accounted for 34.88%of all non-world distribution families.The temperate distribution was dominant in the north,and the tropical distribution type family was higher than the temperate distribution type family,showing the floristic characteristics of transition from subtropical to temperate.It indicated that the flora of this region may originated from tropical areas,showing strong subtropical nature.In terms of genus distribution types,tropical distribution accounted for 50.79%of all non-world genera,and pantropical distribution was dominant,temperate distribution accounted for 45.49%of all non-world distribution genera,and temperate distribution was dominant in the north,and tropical distribution genera were slightly higher than temperate distribution genera,showing a weak tropical nature.
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