Sunken stomata occur in the leaves of

Options

A. Lemna
B. Nerium
C. Lilium
D. Trifolium

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the occurrence of sunken stomata in the leaves of specific plants. Sunken stomata are stomata that are located in depressions or cavities on the leaf surface.

2. **Identifying Key Features of Sunken Stomata**: Sunken stomata are adaptations that help reduce water loss through transpiration. They are often found in plants that thrive in dry or arid environments.

3. **Analyzing the Options**:
- **Lemna**: This is a genus of aquatic plants (duckweeds) that typically do not have sunken stomata.
- **Nerium**: This is a shrub commonly known as oleander. It has adaptations for dry environments, including sunken stomata.
- **Lilium**: This is a genus of flowering plants (lilies) that generally do not have sunken stomata.
- **Trifolium**: This is a genus of clover plants, which also do not typically have sunken stomata.

4. **Confirming the Correct Answer**: Among the options, Nerium is known for having sunken stomata due to its multi-layered epidermis, thick cuticle, and stomata located only on the lower surface of the leaf. This adaptation helps minimize water loss, making it suitable for dry habitats.

5. **Final Answer**: The correct answer is **Nerium**.

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