Corolla

Corolla is a term used in botany to describe the inner floral envelope of a flower, which is usually brightly colored. It is typically composed of petals, which are often fused together.

Structure and Function

The corolla is the second whorl of a flower, located between the calyx and the androecium. It is composed of petals, which are usually brightly colored to attract pollinators. The shape and arrangement of the petals can vary widely, from simple, separate petals to complex, fused structures.

The primary function of the corolla is to attract pollinators, such as bees, butterflies, and birds. The bright colors and distinctive shapes of the petals serve as visual cues for these animals. In addition, many flowers produce nectar and other rewards within the corolla to further entice pollinators.

Types of Corolla

There are several different types of corolla, including:

• Polypetalous: The petals are separate and not fused together.
• Gamopetalous: The petals are fused together, at least at the base.
• Actinomorphic: The corolla is radially symmetrical, meaning it can be divided into two equal halves in multiple ways.
• Zygomorphic: The corolla is bilaterally symmetrical, meaning it can only be divided into two equal halves in one way.

See Also

• Flower
• Petal
• Pollination
• Botany

Corolla Resources
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