The plant diversity of Dongan Zishui national wetland park in Yongzhou,Hunan Province,was invested and analyzed by using two methods of the stand structure investigation and field reconnaissance.Based on the method of analytic hierarchy process (AHP),4 indexes were selected,including the species richness,di-versity of ecosystems,endemic and rare species and invasive species,and the evaluation system of plant diversi-ty was constructed.The plant composition and dominant genera of Dongan Zishui national wetland park were surveyed and counted.Th...