Abstract: The Esteras-isozymes of Glycyrrhiza Longilegumata X. Y. Li have been comparatively studied by means of polyarcylamide gel electrophoresis. The interspecific zymogramatic differences are obvious. Each species possesses its specific zymograms, distinguishable from the others. By means of the zymogramatic index of similarity these species was analysed. It shows the close affinity among 6. 6a、8、8a there is high index of similarity, but they are very far from 2, 4, 5, 8b on the basis of percentage of each zymogramatic peak area with the scanning chromatograms. By means of the systematic cluster and the short distance were caster analysis. When the Euclid's distance was higher than 4. 0 or lower than 4, OGlycyrrhi-za Longilegumata X. Y. Li may be grouped in two categories. 1,5,6,6a,7,8,8b into one category, the seconed category conzains'v-:-a, 3,2.

Key words: Glycyrrhiza, Esterse-isozyme, Affinity