Plants exhibit various flowering phenology patterns, which could be characterized by flowering frequency (continuous to supra-annual) and by regularity (from periodic to irregular pulses). These different flowering patterns are often evident in the same community. Hypotheses proposed to explain irregular and supra-annual flowering phenology (masting) include pollination efficiency, predator satiation, resource optimization and phylogenetic constraints. Species evolving to flower frequently and regularly may be able to sustain populations of seed dispersers by providing constant food supply (fruits). Empirical and theoretical work focuses on masting phenomenon and little were done for non-masting species. This talk aims at integrating various hypotheses for flowering phenology to facilitate model construction for the evolution of flowering phenology.