Calyx

The calyx is a part of the flower that makes up the outermost whorls of the flower bud. It is composed of sepals, and its primary function is to protect the flower before it blooms. In some species, the calyx also serves as a means of attracting pollinators, as it can often be brightly colored. Additionally, the calyx provides support and structure to the flower. Once the flower has bloomed, the sepals may continue to provide protection to the flower or they may drop off. In the fruit-bearing species, the calyx often becomes the protective covering of the fruit. In horticulture, the calyx is used to determine the type of grafting that is to be used and therefore, plays a role in the propagation of certain species of plants.