Tendrillar stipules occur in

Options

A. Dolichos lablab
B. Acacia
C. Smilax
D. Mango

Explanation

To determine where tendrillar stipules occur, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Tendrillar Stipules**:
- Tendrillar stipules are specialized structures that are a modification of stipules. Stipules are small leaf-like structures found at the base of a leaf stalk (petiole).

2. **Identifying the Function of Tendrillar Stipules**:
- These structures serve as tendrils, which are thin, thread-like appendages that help plants climb and provide support, especially in weak-stemmed plants.

3. **Recognizing the Plant Group**:
- Tendrillar stipules are found in specific plant species. One notable example is the genus *Smilax*.

4. **Characteristics of *Smilax***:
- *Smilax* is a monocotyledonous plant, which typically has parallel venation in its leaves. However, *Smilax* is an exception as its leaves exhibit reticulate venation.

5. **Conclusion**:
- Based on the information gathered, tendrillar stipules occur in *Smilax*, which is the correct answer to the question.

### Final Answer:
Tendrillar stipules occur in *Smilax*.

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