Largest petal in corolla of Fabaceae

Options

A. Vexillum
B. Axile
C. Superficial
D. Parietal

Answer

To determine the largest petal in the corolla of the Fabaceae family, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Family**: The question asks about the Fabaceae family, which is commonly known as the legume family. This family includes plants like peas and beans.

2. **Understand the Structure of the Flower**: In flowering plants, the corolla is made up of petals. The arrangement and size of these petals can vary among different families.

3. **Recognize the Petal Types in Fabaceae**: In the Fabaceae family, the petals are often categorized into different types. The largest petal is known as the "standard" petal.

4. **Define the Standard Petal**: The standard petal in Fabaceae is also referred to as "vexillum." This petal is typically larger than the other petals in the flower.

5. **Eliminate Incorrect Options**: The other terms provided in the question (axile, superficial, parietal) refer to different structures or types of placentation and are not relevant to the question about the largest petal in Fabaceae.

6. **Conclude the Answer**: Based on the information gathered, we can conclude that the largest petal in the corolla of Fabaceae is the "vexillum."

### Final Answer:
The largest petal in the corolla of Fabaceae is **vexillum**.

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