noun
corolla
kuh-ROH-luh/kəˈrəʊlə/
The petals of a flower considered together.
The flower's five petals form a corolla around its center.

Etymology
Latin corolla meant a “little crown” or garland. Its botanical use applies that image to the petals together, forming a crownlike arrangement around the flower’s center.
In context
the petals are referred to as the Corolla and some words used to describe the Corolla are tubular trumpet-shaped and funnel shaped
More examples
- This flower has a bright yellow corolla.
- The petals join together to form a tubular corolla.
- The flowers' corollas close as evening approaches.
Forms
corolla · corollas · corollae
Similar words
- petals
- Petals are individual parts; corolla names their complete group.