When united, the united portion is the corolla tube and the portion above is known as the corolla lobes. The polypetalous corolla is also known as dialypetalous, while gamopetalous corolla is called sympetalous. The claw corresponds to the petiole, and the limb to the blade of a leaf. In this case, it is termed as sepaloid as in Annona, Polyalthia, Artabotrys, et In general the lower part of a petal is narrow known as claw and the upper part’ wide, called limb. Petals may sometimes be green and may look like t sepals. Like calyx, the corolla may be polypetalous or gamopetalous in which petals may be free or united. It possible due to the bright color of the petals combined with the scent of essential present in it. The primary function of corolla is to attract the insects for pollination. It generally brightly colored due to the presence of anthocyanin and anthoxant pigments. Corolla also protects the stamens and carpels in bud condition like does calyx. It is the second (accessory) whorl of flower.
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