Adaptation to the growth environment has been considered a common driver of plant speciation. Recently, increasing attention has been paid to pollinator-driven speciation in flowering plants, because pollination can directly influence reproductive isolation. Some field evidence indicates that adaptation to the growth environment can change floral traits, potentially affecting pollinator attraction and specialization. Yet how the growth environment and pollinators interactively drive adaptation and ecological speciation in plants have been poorly explored. In this talk, I introduce a population-genetic model of plant speciation in which a trait determining growth performance in divergent habitats influences pleiotropically pollinator attraction. The model shows that an introduction of a novel mutation to a floral trait and floral constancy by pollinators can lead to reproductive isolation between subpopulations occupying divergent habitats. This result suggests that correlated performance in growth and pollinator attraction can play an important role in ecological speciation in angiosperms.