Characterizing each step of pollination in Phlox drummondii reveals that a single butterfly species predominates in the pollinator assemblage.

Premise: A central goal of pollination biology is to connect plants with the identity of their pollinator(s). While predictions based on floral syndrome traits are extremely useful, direct observation can reveal further details of a species' pollination biology. The wildflower Phlox drummondii has a floral syndrome consistent with pollination by Lepidoptera.