Abstract:Taxillus sutchenensis (Lecomte)Danser is a major species of Songjisheng, a traditional Chinese materia medica. From its leaves three flavonoid compounds hare been isolated. On the basis of physical anb chemical tests and spectroscopic (UV, IR) analysis, they were identified as quercitrin, avicularin and quercetin respectively. From the leaves of T. sutchuenensis var. duclouxii(Lecomte)Kiuined, similar flavonoid compounds have been obtained.