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This study suggested that slow stamen movement in Lychnis cognata presents pollen gradually to pollinators, representing an adaptation to decrease interference between dehisced and dehiscing anthers and pistils that could promote pollen export and deposits. Adaptations that decrease both male-male sexual interference and male-female sexual interference should be recognized as important selective forces in floral evolution. This study also proposed that other selective pressures, including pollen dispensing mechanisms, pollen longevity, pollinator behavior and weather, might contribute to floral evolution.

Slow stamen movement in a perennial herb decreases male–male and male–female interference