What is the primary role of the sepal in a flower?

The primary role of the sepal in a flower is to protect the flower bud. Sepals are typically green and leaf-like structures that enclose and safeguard the developing flower before it blooms. They ensure that the sensitive parts of the bud, including the petals, stamens, and stigma, are shielded from physical damage and harsh environmental conditions while the flower is still in its early stages of development. Once the flower blooms, sepals often remain attached, providing additional support to the flower structure as it develops. This protective function is crucial for the successful maturation of the flower into its reproductive phase.

Other functions associated with different flower parts, like capturing pollen or producing pollen, are carried out by distinct structures such as the stigma and anthers, respectively.