Innumerable floral traits have been ascribed adaptive significance via a variety of mechanisms. One such trait is herkogamy, the spatial separation of the stigma and anthers. In self-incompatible plants, herkogamy is thought to reduce sexual interference, defined as any situation in which one sex function directly decreases the success of the other sex function. I investigated herkogamy in the dwarf bluebell (Mertensia fusiformis), and failed to find evidence for the presence of sexual interference or the predicted functional significance of herkogamy.
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