On the basis of numbers, give types of stamen and give examples.

$\rightarrow$ Androecium is composed of stamens. Each stamen represents male reproductive organ.
$\rightarrow$Each stamen consists of a filament and anther.
$\rightarrow$ Pollen grains are produced in pollen-sacs.
$\rightarrow$ Each anther is usually bilobed and each lobe has two chambers, the pollen-sacs. Pollen grains are produced in pollen-sacs.
$\rightarrow$ A sterile stamen is called staminode.
$\rightarrow$ Filament and anther are connected by connective.
$\rightarrow$ Stamens of flower may be united with other members such as petals or among themselves.
$\rightarrow$ Epipetalous : When stamens are attached to the petals, they are epipetalous e.g. brinjal.
$\rightarrow$ Epiphyllous : When stamens are attached to the perianth they are epiphyllous as in the flower lily.
$\rightarrow$ Polyandrous : The stamens in a flower may either remain free is called Polyandrous.
$\rightarrow$ Monoadelphous : The stamens may be united into one bunch or one bundle is called monoa delphaes e.g. china rose.
$\rightarrow$ Diadelphous and Polydelphous : Stamens may be united in two bundles is called Diadelphous. Stamens may be united into more than two bundles is called Polydelphous stamen.
$\rightarrow$ There may be a variation in the length of filaments within a flower, e.g. Salvia and mustard.