The morphological effects of acid rain on the leaf area, the weight per leaf, and the root/crown of plants were studied by using different pH solutions to simulate acid rain and treating 6 species of common green plants in the southern cities. Results showed that all of the 3 morphological indexes of 6 species of trees had been affected to some extent. (1) The simulated acid rain of pH 5.0, 4.0 and 3.0 reduced the leaf area of Magnolia grandiflora, Cinnamomum camphora and Osmanthusfragrans; (2) The simulated acid rain of pH 5.0, 4.0 and 3.0...