In this paper, based on the DUS testing of new Lavandula spp., the differences and correlations of main phenotypic traits between Lavandula angustifolia and L. heterophylla were observed and analyzed. The results showed that the plant morphological traits of L. angustifolia were better than that of L. heterophylla, moreover, L. angustifolia exhibited relatively high adaptive capacity to the environmental conditions in introduction areas of north China. For the inflorescence, the ornamental traits of L. heterophylla were totally superior to that of L. angustifolia, especially in flower color diversity. It had obvious differences in both quantitative traits and qualitative traits between the two species, and these traits remained relatively stable in the growth progress. The correlation coefficients among the traits of two species were high, and the trait matching numbers at the 1% significance level of L. angustifolia were slightly more than that of L. heterophylla. [ABSTRACT FROM AUTHOR]