Write about corolla of Petunia.

Explanation

### Step-by-Step Solution:

1. **Definition of Corolla**: The corolla refers to the collective term for the petals of a flower. In the case of Petunia, the corolla is composed of five petals.

**Hint**: Remember that the corolla is specifically the part of the flower made up of petals, which can vary in number and structure among different species.

2. **Family Classification**: Petunia belongs to the family Solanaceae, which is important for understanding its botanical characteristics and relationships with other plants.

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