Pulvinate leaf base is found in

Options

A. Lycopersicum
B. Trifolium
C. Nicotiana
D. Petunia

Answer

To determine which plant has a pulvinate leaf base among the options provided (Lycopercium, Trifolium, Indicotiana, or Petunia), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Pulvinate Leaf Base**:
- A pulvinate leaf base is characterized by a swollen, joint-like thickening at the base of the leaf stalk (petiole). This structure allows for certain movements in the leaf, independent of growth.

2. **Identifying Characteristics**:
- The pulvinus is the swollen part that facilitates movements such as thigmonastic movements (responses to touch).

3. **Analyzing the Options**:
- **Lycopercium**: This is not known for having a pulvinate leaf base.
- **Trifolium**: This plant belongs to the leguminous family (Fabaceae), which is known for having pulvinate leaf bases.
- **Indicotiana**: This plant does not typically exhibit a pulvinate leaf base.
- **Petunia**: This plant is also not known for having a pulvinate leaf base.

4. **Conclusion**:
- Among the given options, **Trifolium** is the only plant that has a pulvinate leaf base.

### Final Answer:
The pulvinate leaf base is found in **Trifolium**.