The reason for flowers is reproduction. Three major parts of a flower function to achieve this purpose. First, the gynoecium sits at the center. This is the ovule-producing portion. It’s where seeds are born. Its stigmas accept pollen produced by the second major flower part, the androecium. This part is made up of a whorl of stamens that generally surround the gynoecium, except when the gynoecium and androecium are found in separate flowers. The third major part, known as the perianth, is not..