The standard petal of a papilionaceous corola is also called

Options

A. Pappus
B. Vexillum
C. Corona
D. Carina

Answer

To answer the question, "The standard petal of a papilionaceous corolla is also called," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Papilionaceous Corolla**:
- The papilionaceous corolla is a type of flower structure found in the Fabaceae family (legumes). It consists of five petals arranged in a specific manner.

2. **Identify the Petal Types**:
- In a papilionaceous flower, the petals are categorized as follows:
- **Standard Petal**: The largest petal, which is often positioned at the top.
- **Lateral Petals**: Two petals that are positioned on the sides, often referred to as the wings.
- **Anterior Petals**: The two smallest petals at the bottom, known as the keel.

3. **Name of the Standard Petal**:
- The standard petal in a papilionaceous corolla is specifically referred to as the **vexillum**.

4. **Conclusion**:
- Therefore, the answer to the question is that the standard petal of a papilionaceous corolla is called the **vexillum**.