Bulliform cells are present in

Options

A. Bundle sheath
B. Mesophyll
C. Vascular bundles
D. Epidermis

Answer

### Step-by-Step Solution:

1. **Identify the Type of Cells**: Bulliform cells are specialized cells known as motor cells. They are large, bubble-shaped epidermal cells.

2. **Determine Their Location**: Bulliform cells are primarily found in the leaves of monocots, specifically on the upper surface of the leaves.

3. **Recognize Their Family**: They are particularly associated with the family Poaceae (grasses), which is a family of monocots.

4. **Understand Their Function**: The main function of bulliform cells is to assist in the unfolding of developing leaves. They also play a role in the rolling and unrolling of mature leaves in response to varying moisture conditions.

5. **Describe Their Structure**: Bulliform cells are highly vacuolated, meaning they contain large vacuoles that store water. This feature is crucial for their function in leaf movement.

6. **Conclude the Answer**: Based on the information gathered, bulliform cells are present in the epidermis of monocot leaves, particularly in the family Poaceae.

### Final Answer:
Bulliform cells are present in the epidermis of monocot leaves, specifically in the family Poaceae.