The stigma is the receptive tip of a carpel, or of several fused carpels, in the gynoecium of a flower.
Stigma of a Tulipa species, with pollen
Closeup of stigma surrounded by stamens of Lilium 'Stargazer')
Maize stigmas, collectively called "silk"
Gynoecium is most commonly used as a collective term for the parts of a flower that produce ovules and ultimately develop into the fruit and seeds. The gynoecium is the innermost whorl of a flower. It
Stigma (botany)
…The stigma (pl.: stigmas or stigmata) is the receptive tip of a carpel, or of several fused carpels, in the gynoecium of a flower. The stigma, along with the style and ovary (typically called the stigma-style-ovary system…
Flower of Magnolia × wieseneri showing the many pistils making up the gynoecium in the middle of the flower
Hippeastrum flowers showing stamens, style and stigma
Hippeastrum stigmas and style
Moss plants with gynoecia, clusters of archegonia at the apex of each shoot.