A method was developed for identification of cultivars of the pasture legume, Stylosanthes capitata Vog., using electrophoretic patterns of seed proteins in polyacrylamide gels as the genotypic markers. The method can be used for accurate identification of cultivars in germplasm banks, in selecting parents for development of new varieties, and in registering new cultivars for proprietary purposes. © 1988 Kluwer Academic Publishers.