Which of the correct arrangement of corcolla in family papilionaceae

Options

A. `C_(1+(2)+2)`
B. `C_(1+2+(2))`
C. `C_(1+2+2)`
D.

Answer

To answer the question regarding the correct arrangement of corolla in the family Papilionaceae, we can break down the solution into clear steps:

### Step-by-Step Solution:

1. **Understanding the Family**:
- The Papilionaceae family is a subfamily of the Fabaceae (legume) family, which includes plants such as beans, peas, and pulses.

2. **Identifying the Structure of Corolla**:
- The corolla in Papilionaceae consists of five petals.

3. **Arrangement of Petals**:
- The petals are arranged in a specific way known as "Vexillary Aestivation".
- This means that the petals are arranged in a particular order:
- One posterior petal (also called the standard petal).
- Two lateral petals (known as wings).
- Two anterior petals that are fused together to form a structure called the keel.

4. **Labeling the Petals**:
- The posterior petal (standard) is labeled as C1.
- The two lateral petals (wings) are labeled as C2 and C3.
- The two anterior petals (keel) are labeled as C4 and C5, and they are united.

5. **Final Arrangement**:
- Therefore, the correct arrangement can be summarized as:
- 1 posterior petal (C1) + 2 lateral petals (C2 and C3) + 2 anterior petals (C4 and C5, which are united).
- This arrangement can be expressed as: C1 + (C2 + C3) + (C4 + C5).

6. **Conclusion**:
- Based on the explanation, the correct arrangement of corolla in the family Papilionaceae is that the posterior petal overlaps the lateral petals, and the anterior petals are fused to form the keel.