Plants produce flowers which have male and female organs. The male organ, or stamen, contains pollen. The female organ, or carpel, contains the stigma, style and ovary. Seeds are formed when pollen from the stamen fertilizes the carpel. Flowers have specific parts - the stigma receives pollen, the style supports the stigma, the ovary holds the ovules that become seeds, the anther produces pollen, and the filament supports the anther.