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Term Definition
Receptive stigma The time when pollen grains placed on the stigma by a pollinator are able to germinate and, thus, the nuclei they contain can potentially fertilize the egg which then has the chance to grow into an embryo, then become a seedling, and finally a reproductive plant itself. Stamens and stigma of a Bignoniaceae. Photos by S. A. Mori.
Stigma The part of the gynoecium receptive to pollen usually located at the summit of the style. Complete flower. Drawing by B. Angell.