A sepal (from Latin separatus "separate" + petalum "petal") is a part of the flower of angiosperms or flower plants. Sepals in a "typical" flower are green and lie under the more conspicuous petals. As a collective unit the sepals are called the of a flower. The calyx is part of the perianth of the flower. The perianth is composed of the sepals (collectively called the calyx) and the corolla (which is the outer part of the flower with the inner part of the perianth composed of the petals). The… (More on Sepal)