Family Leguminosae is classified into three sub-families on the basis of

Options

A. Calyx and corolla
B. Symmetry of flower
C. Corolla and androecium
D. Corolla and carpels

Answer

To answer the question regarding the classification of the family Leguminosae into three sub-families, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Family Leguminosae**:
- The family Leguminosae, also known as Fabaceae, is a large family of flowering plants that includes many important agricultural crops.

2. **Identifying the Basis of Classification**:
- The classification of Leguminosae into three sub-families is primarily based on certain floral characteristics.

3. **Key Floral Characteristics**:
- The main characteristics used for classification include:
- **Corolla**: This refers to the petals of the flower and their arrangement.
- **Symmetry**: The symmetry of the flower can be regular (actinomorphic) or irregular (zygomorphic).
- **Estivation**: This is the arrangement of petals in the flower bud before it opens.
- **Androecium**: This refers to the male reproductive organ, which is made up of stamens.

4. **Sub-Families of Leguminosae**:
- The family is typically classified into three sub-families based on the above characteristics:
- **Papilionoideae**: Characterized by a butterfly-like flower structure (irregular symmetry).
- **Caesalpinioideae**: Often have a more regular flower structure (actinomorphic).
- **Mimosoideae**: Known for their fluffy flower heads and often have a unique arrangement of stamens.

5. **Conclusion**:
- The classification into these three sub-families is based on the floral structure, particularly the corolla, symmetry, and androecium.