Perianth

Definition

The perianth is the non-reproductive part of a flower, consisting of the calyx (sepals) and corolla (petals). It serves to protect the reproductive organs and often aids in attracting pollinators.

5 Must Know Facts For Your Next Test

1. The perianth is divided into two parts: the calyx and the corolla.
2. Sepals, which form the calyx, are usually green and leaf-like structures that protect the budding flower.
3. Petals, making up the corolla, are often colorful and attract pollinators to the flower.
4. In some flowers, sepals and petals are indistinguishable from each other; such structures are called tepals.
5. The symmetry of the perianth can be radial (actinomorphic) or bilateral (zygomorphic), influencing how pollinators interact with the flower.

Review Questions

Related terms

Calyx: The outer whorl of a flower, composed of sepals, which protect the developing bud.

Corolla: The inner whorl of a flower, composed of petals that are often brightly colored to attract pollinators.

Tepal: A floral structure where sepals and petals are not distinctly different and appear similar in form.