Unique (significant) vegetative characters formed in members of Fabaceae

Options

A. Tap root system , reticulate venation
B. Nodular roots , pulvinous leaf base
C. Woods climbers , simple leaves
D. Vexillary aestivation, papilionaceous corolla

Answer

### Step-by-Step Solution:

1. **Identify the Family**: The question refers to the Fabaceae family, commonly known as the legume, pea, or bean family.

2. **Recognize Unique Vegetative Characters**: In members of the Fabaceae family, several unique vegetative characters can be identified. These include:
- **Tap Roots**: Members of Fabaceae typically exhibit a tap root system, which is a key characteristic of many dicots.
- **Reticulate Venation**: The leaves of Fabaceae members usually display a reticulate (net-like) venation pattern.
- **Pulvinous Leaf Base**: This refers to a swollen leaf base that can be found in some members of the Fabaceae family.

3. **Distinguish Between Vegetative and Floral Characters**: It is important to differentiate between vegetative characters (related to the growth and structure of the plant) and floral characters (related to the flowers). For example, vexillary aestivation and papilionaceous corolla are floral characteristics and not relevant to vegetative characters.

4. **Evaluate Other Features**:
- **Nodular Roots**: While nodular roots are often associated with legumes due to their symbiotic relationship with nitrogen-fixing bacteria, they are not a defining vegetative character of the Fabaceae family as a whole.
- **Wood Climbing and Simple Leaves**: These features are not consistently found across the family. While some members may exhibit climbing habits, simple leaves are not a universal trait.

5. **Conclusion**: The significant vegetative characters that are unique to members of the Fabaceae family include:
- Tap roots
- Reticulate venation
- Pulvinous leaf bases