Showy corollas can attract pollinators such as insects or birds. Wind-pollinated plants frequently have minute corollas or lack corollas entirely. The androecium is just inside the corolla. With magnification, you can see that the anther is actually made up of sacs. It is in these sacs that pollen grains are produced.
Pollen grains are capable of producing sperm, the male sex cells.
Eggs, the female sex cells, are produced in ovules, which are inside the ovary. In many species, some flower parts may be fused with others, extremely reduced, or completely absent. Complete flowers have sepals, petals, stamens, and pistils, while incomplete flowers lack one of these parts. The typical flower described above is both perfect and complete, while anemones are perfect and incomplete. Flowers can be perfect and complete, perfect and incomplete, or imperfect and incomplete, but never imperfect and complete.