Question

Hypostomatic condition, sunken stomata and stomatal hairs are found in this leaf

• A. Nymphaea
• B. Nerium
• C. Typha
• D. Sagittaria

Hint:

In xerophytic plants like Nerium, adaptations like sunken stomata and stomatal hairs help conserve water by reducing transpiration.

Answer 1

The Correct Option is B

Hypostomatic Leaves and Structural Adaptations

In plants, hypostomatic refers to the condition where stomata are present on the lower surface of the leaf. Additionally, sunken stomata and stomatal hairs are structural adaptations that help reduce water loss through transpiration, especially in plants growing in arid conditions.

• Option 1: "Nymphaea" ❌ Incorrect. Nymphaea (water lily) typically has stomata on the upper surface, not sunken.
• Option 2: "Nerium" ✅ Correct. Nerium (oleander) has hypostomatic leaves with sunken stomata and stomatal hairs, which help minimize water loss.
• Option 3: "Typha" ❌ Incorrect. Typha (cattails) has different leaf adaptations, but not sunken stomata or stomatal hairs.
• Option 4: "Sagittaria" ❌ Incorrect. Sagittaria (arrowhead) does not exhibit sunken stomata and stomatal hairs like Nerium.

Thus, the correct answer is: (2) Nerium.