In this paper we present the results of pollen analysis of twelve sample of honey and twelve sample of pollen, colected by Apis mellifera L., during march to October of 1960 at Piracicaba, SP Brazil. Eleven species of nectariferous plants were identified by pollen analysis in honey and thirteen species of poliniferous plants were identified by pollen analysis of pollen collected by the bees. In this work I could evaluate the flowering period of honey plants around this area, using pollen analysis as a indirect method. We also compared this indirect evaluation with direct observation of flowering period of honey plants in São Paulo State, according to KERR and Amaral. Doing that we could point out that pollen analysis is a good method to use in our future studies of phenology of honey plants.