The document summarizes the characteristics of composite flowers, which make up the largest family of flowering plants. Composite flowers are actually made up of many small flowers tightly grouped together. They have evolved to attract pollinators like insects through showy petals. Some key composite flowers mentioned include daisies, asters, black-eyed Susans, goldenrod, and thistles. The document also provides brief descriptions of 13 different composite flowers and their identifying features.