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:ale floral displays are frequently larger than female displays in many plants with
imperfect flowers, which had been known well before Darwin's discussion of floral
polymorphism (Darwin 1888). &#'#(
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((morning (Young and Stanton 1990; Delph and Lively 1992), and I
have unpublished experiments that support this. Such a decay suggests an intriguing third
hypothesis, that pollinators are choosing flowers in sequence only until they have acquired
sufficient residual pollen load to insure continued fertilization. If so, this points to a more
complicated situation, in that pollinators may be selected to maximize food crops for future
generations.
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absolute preference = total visits to larger !ower ÷ total visits to both
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sequence preference = &rst visits to larger !ower ÷ &rst visits to both
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