At left, female (top) and hermaphrodite (bottom) flower of bladder campion (Silene vulgaris); their nectaries differ in production of sugar content. At right, a European skipper (Thymelicus lineola) removes nectar from a female bladder campion flower. Differences in nectar production between the genders of plants may affect pollinator activity and, ultimately, indbreeding.
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copyright: Claudia L. Jolls, BSA
license: http://images.botany.org/index.html#license