Pollinator assemblage composition predicts trait divergence in a pollination-generalized plant

The causal role of pollinators in driving the divergence of plant traits is a fundamental tenet of angiosperm evolution, providing hallmark examples of natural selection. However, it remains unclear how geographic variation in pollinator assemblages relates to the divergence of pollination traits in pollination-generalized plants. We characterized pollinator assemblages that interacted with Viscaria vulgaris in southern Sweden, and evaluated, through statistical dimension reduction, whether pollination traits were associated with an inferred main axis of geographic variation in pollinator assemblages. We documented a functionally broad range of pollinators that visited V. vulgaris. Although the most frequent pollinator functional groups were present in most populations, their relative contribution to flower visitation varied across the study area, establishing a geographic mosaic of local pollinator assemblages. We demonstrate that the geographic variation of local pollinator assemblage..., , # Data from: Pollinator assemblage composition predicts trait divergence in a pollination-generalized plant Dataset DOI: [10.5061/dryad.xwdbrv1tf](https://doi.org/10.5061/dryad.xwdbrv1tf) ## Description of the data and file structure Data were collected from 27 populations of *Viscaria vulgaris* in southern Sweden between 2021 and 2024. At the inflorescence and flower level, we measured traits related to pollinator attraction (inflorescence length, flower number, corolla diameter) and pollen transfer (tube width and length, nectary–stigma distance) on 3,878 inflorescences from 1,797 individuals. Concurrently, repeated 10-minute censuses recorded the number and identity of flower visitors, which were classified into functional groups based on morphology and foraging behaviour. These data captured spatial, temporal, and developmental variation in both plant traits and pollinator activity, forming the basis for multivariate statistical analyses linking divergence in pollination traits t..., ,