Base on the dominate species of community and importance value of exotic plants,the most harmful exotic plants in Changsha were Alternanthera philoxeroide,Hyptis rhomboidea,Paspalum conjugatum and Veronica polita.

• 根据样地中群落优势种和外来植物重要值的情况确定了危害最严重的几种外来植物是空心莲子草、吊球草、两耳草、婆婆纳。