Vegetative Parts of a Flower The vegetative part of a flower consists of the following: Petals: This is a bright-coloured part that attracts bees, insects, and birds. The colour of petals varies from plant to plant; some are bright while some are pale coloured. Thus, petals help us to differentiate one flower from another. flower , the characteristic reproductive structure of angiosperms. As popularly used, the term “ flower ” especially applies when part or all of the reproductive structure is distinctive in color and form. Given that there over 352,000 species of flowering plants known to science, flowers have a seemingly endless array of colors, sizes, forms, and anatomical arrangement. They range in size from minute blossoms to the giant blooms of Rafflesia and the titan arum. In some plants, such as ... The flower can be classified into two categories: complete and incomplete. A complete flower contains all the essential parts for reproduction, including sepals, petals, stamens, and pistils. In contrast, an incomplete flower is missing one or more of these fundamental structures. How do flowers ensure successful reproduction through their structures?