Abstract: Reproductive biology provides information on life forms, rate of flowering, type of breeding system, plant-pollinators interaction, fruit and seed output, overall fitness and survival of the species. The present study was carried out to reproductive biology of Evolvulus alsinoides Linn. (Convolvulaceae) is a medicinal herb of semi arid zone of Agra in North India. The study was carried out for a period of twenty four months to observe the reproductive parameters of the E. alsinoides in the different places of Agra. The flowers appear from February to June and attracted the vide variety of insects for the pollination. The fruiting nature indicates that maximum number of flowers set into fruit by xenogamy as compared to geitonogamy.