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The Fabaceae are a large family, members occurence of which is very common at various latitudes. The characteristic feature of this plant family is the symbiosis with the bacteria genus Rhizobium and Bradyrhizobium. The analysis of acetone extracts from dried seeds of the subfamily Papilinioideae revealed the occurrence of alkylresorcinols in about 85% of the examined samples. Unfortunately, it was not possible to verify this observation in the second subfamily of Fabaceae-Caesalpinioideae. It was partly because there is merely one species belonging to this subfamily, in Poland.In reference to the common occurence of alkylresorcinols in Papilinioideae some interspecific differences were indicated. This survey is a basis for further studies on the Fabaceae family.