Identification of seven species of Clematis L. (C. chrysocoma Fr.,C. amendii Fr.,C. fasciculiolia Fr.,C. ranunculoides Fr.,C. rubifolia C. H. Wright,C. florida Thunb. and C. brevicaudata DC. )was studied by RAPD analysis. Results showed that the differences of RAPD between different species were significant,but nonsignificant between same species obtained from different localities