Abstract: Tabebuia and Handroanthus species are famous woody plants in the world,which plays an important role in urban landscaping. To comprehensively understand the genetic diversity of cultivated species of Tabebuia and Handroanthus in China,as well as to establish a reliable phenotypic identification method,the phenotypic variation and genetic diversity of 18 leave traits among 6 species in total 812 individual trees cultivated in 11 cities in the southeast and south of China were analyzed respectively,and the 6 species（Tabebuia aurea,T.rosea,Handroanthus heptaphyllus,H.impetiginosus,H. chrysotrichus and H. chrysanthus）were compared as the control respectively and grown in Jianfengling Tropical Forestry Experimental Station,Institute of Tropical Forestry,Chinese Academy of Forestry. The results showed that:（1）All the 18 phenotypic traits of species were significantly different among species and individual trees,and the phenotypic differentiation coefficient and interspecific repeatability of the 9 phenotypic traits,such as compound leaf length,leaflet length,leaflet width,leaflet length/width,leaf apex length/width,Leaf margin,leaf texture,leaf coat or not,leaf shape,were all over 60%,indicated that the high genetic correlation in interspecific variation and could be available taxonomy and genetic analysis of these species；（2）The individual trees commonly cultivated in southeast China could be divided into 4 categories and 10 types,where the class A included T. aurea,the class B included H.heptaphyllus,T. rosea,H. impetiginosus,the class C included H. chrysotrichus and class D included H.chrysanthus,respectively. Additionally,different types with class B,C,D are divergent in leaf shape,leaf size,leaf length,leaf texture,margin serrate state and coat,suggested a certain diversity variation of species.This study found 9 reliable traits available to species identification and evaluated the genetic diversity of species in urban landscape cultivated in southeast and south China. These results would provide reference for the future study in classification,cultivation,production and application of Tabebuia and Handroanthus species in China.