A stamen is the male reproductive organ of a flower that produces pollen grains. The flower stamen, also referred to as the microsporophyll, comprises three main components: a filament, anther, and connective. The number and length of stamens are variable in flowers of different species. A sterile stamen is called staminode. The flower stamens are typically arranged in a whorl and collectively form the androecium.
A stamen is composed of two parts– the long and slender stalk called the filament, and the terminal generally bilobed structure called the anther. The filament serves as a stalk-like structure, while the anther is responsible for producing and releasing pollen.
The filament:
Anther:
Structure of microsporangium:
Microsporogenesis:
Adhesion of stamens refers to the condition where the stamens are fused or attached to other parts of the flower. It is of following types:
Stamens on the basis of attachment of anther to the filaments:
Stamens on the basis of position and orientation:
In certain flower species there exists a variation in filament length.
(Session 2025 - 26)