Stamens They are modified leaves where the male gametes of the flower are formed. The set of stamens forms the androceu (from Greek andros, male, male). A stamen usually has an elongated part, the fillet, and an enlarged end portion, the anther.

The interior of the anther is generally divided into four cavities, within which pollen grains form. Within each grain of pollen two male gametes are formed, called sperm nuclei. When the flower is ripe, the anthers open and release pollen grains.


Carpels they are modified leaves, which form the feminine gametes of the flower. One or more carpels form a vase-shaped structure, the pistil. This one has a dilated basal region, the ovary, from which comes a tube, the stylet, which ends in a dilated region, the stigma. The set of pistils of a flower constitutes the gyno (from Greek gyncos, woman, female).

The pistil may consist of one, two or more carpels, depending on the type of flower. In general, the number of internal chambers that the ovary has corresponds to the number of carpels that have fused to form it. Within the ovary one or more eggs.

Plant eggs are complex structures made up of many cells. In this, plant eggs differ from animal eggs, which are unicellular structures.
Within each plant egg is a specialized cell, the the sphere, which is the female gamete itself.

Floral diagrams

The number of types of floral pieces studied varies from flower to flower and can be represented schematically by a diagram. Each type can be represented by 3, 4 or 5 pieces or multiples of these numbers. In the hibiscus flower, for example, a common plant in gardens, there are 5 sepals, 5 petals, a multiple number of 5 stamens and a pistil whose ovary is divided into 5 stores.


In some plants, many flowers cluster on the same branch, forming sets called inflorescences.

Broccoli flower