Abstract: RFLPs (Restriction Fragment Length Polymorphisms) was used to analysis chloroplast DNA of 15 paulownia species. Based on the estimated values of genetic distance, the dendrogram was constructed using UPGMA (Unweighted pair group method of arithmetic clustering), and three groups can be classified. Since most of the values of genetic distance are over 0.70, especially for P. taiwaniana Hu et chang and P. kawakamii Ito, which is 1.00, close relationship among the species could be concluded. At the end of this paper, the taxonomy for some of the paulownia species was discussed.

Key words: Paulownia, restriction fragment length polymorphisms(RFLP), classification