Anatomy of a flower.

Peduncle: Flower stock
Receptacle: The part of a flower are attached to the stalk. 
Sepal: The outer parts of the flower that enclose a developing bud.
Petal: The parts of a flower that are often conspicuously colored.
Stamen: The pollen producing part of a flower.
Anther: The pollen is produced in this part of the stamen.
Pistil: The ovule producing part of a flower. The mature ovary is a fruit, and the mature ovule is a seed.
Stigma: The part of the pistil where pollen germinates.
Ovary: The enlarged basal portion of the pistil where ovules are produced.

reference http://biology.about.com/od/plantbiology/a/aa100507a.htm