The study of plant flora for urban greening in Hainan

The speed of urban greening development is very fast and many plant species have been used for greening over the past ten years in Hainan. The characteristics of plant flora, morphological and ecological properties are studied for using these plant species scientifically based on a two-year investigation. The study results show that there have been great achievements in urban greening featuring strong tropical and coastal regions,based on the principle of combining indigenous plants with foreign plants, plant dominance with biodiversity,topical plants no-tropical plants in Haikou and Sanya. Now, 838 plant species, 145 families and 475 genus have been investigated. 15 species of protective plants are recorded in Haikou and Sanya. However, it is pointed out that the development of construction in space is delayed for the use of only 46 species of liana plants and 28 species of shade plants. What is more,high similarity in selecting plant species for greening between Haikou and Sanya must be decreased, because such a similarity is not good for building unique cities.