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For the Bulgarian physician, see Stamen Grigorov. For the data visualization and cartography studio, see Stamen Design. Androecium redirects here; for the structure in cryptogams, see Antheridium. Stamens of a Hippeastrum with white filaments and prominent anthers carrying pollen The stamen (plural stamina or stamens ) is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium . [1] Contents 1 Morphology and terminology 2 Etymology 3 Variation in morphology 4 Pollen production 5 Sexual reproduction in plants 6 Descriptive terms 7 References 8 Bibliography 9 External links Morphology and terminology A stamen typically consists of a stalk called the filament and an anther which contains microsporangia . Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle area of the anther. The sterile tissue between the lobes is called the connective . A pollen grain develops from a microspore in...

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. Gynoecium (from Ancient Greek γυνή , gyne , meaning woman , and οἶκος , oikos , meaning house ) 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 (one or more) pistils in a flower and is typically surrounded by the pollen-producing reproductive organs, the stamens, collectively called the androecium. The gynoecium is often referred to as the "female" portion of the flower, although rather than directly producing female gametes (i.e. egg cells), the gynoecium produces megaspores, each of which develops into a female gametophyte which then produces egg cells. The term gynoecium is a...