An androecium is the third whorl of most flowers. It is made up of male reproductive units called stamens. A stamen has a long stalk called a filament. At the top of the filament is a cluster of microsporangia called the anther.

How is androecium formed?

In all but a few extant angiosperms, the stamen consists of a long slender stalk, the filament, with a two-lobed anther at the tip. The anther consists of four saclike structures (microsporangia) that produce pollen for pollination. ... All the stamens of a flower are collectively called the androecium.

Is androecium a gynoecium?

The gynoecium is the innermost whorl of a flower; it consists of (one or more) pistils and is typically surrounded by the pollen-producing reproductive organs, the stamens, collectively called the androecium.