There are four parts of a flower the pistol, stamen,petal and sepal.

Pistol

The five knobs make up the pistol that makes the egg.

Stamen

Each stamen is covered with grains of pollen.

Petals

The petals surround and protect the parts of the flower that make seeds.

sepal

The sepals are the leaflike parts of the flower buds. They are usually green but may be other colors.