This document describes the main parts of a flower including the stamen, pistil, petals, sepals, and receptacle. It explains their functions in reproduction and pollination. Specifically, it states that the stamen produces pollen grains, the pistil contains the ovary and stigma, petals are often colorful, and the receptacle attaches other parts. It also discusses types of flowers and how plants are commonly pollinated by bees, birds, wind or animals. Finally, it outlines how flowers are useful to ecosystems by facilitating pollination, attracting wildlife, and allowing plant species to continue.