Plants are grouped according to natural relationships, including trends in specialization of flowers. Receptacle Sepals , - function to protect flower bud Petals , or collectively, the corolla . Several stamens are attached to receptacle around the pistil Stamen consists of stalk-like filament on which an anther is located. Stigma Style Ovary Inflorescences .
Many flowers have both male and female reproductive components.
The 4th megaspore 2 outer layers of the embryo sac become the seed coat of the seed. Patches of tissue on the anther contain microspore mother cells which produce microspores , which mature into pollen grains. Simultaneously with ovule becoming a seed, ovary matures into a fruit. Artificial parthenocarpy in fruit crops is achieved by using plant hormones .