Tendrillar stipules occur in

Options

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

Answer

To solve the question "Tendrillar stipules occur in," we will follow these steps:

### Step 1: Understand the Concept of Stipules
Stipules are small leaf-like structures found at the base of the leaf stalk (petiole). They can serve various functions, including protecting the petiole and sometimes developing into other structures.

**Hint:** Remember that stipules are associated with the petiole and can have different modifications.

### Step 2: Define Tendrillar Stipules
Tendrillar stipules are stipules that have modified into tendrils. Tendrils are specialized structures that help plants climb and support themselves, particularly in weak-stemmed plants.

**Hint:** Focus on the role of tendrils in climbing plants and how stipules can be modified to serve this purpose.

### Step 3: Analyze the Given Options
The options provided are:
- Dolichos
- Labab
- Acacia
- Smilax
- Mango

We need to determine which of these plants has stipules that are modified into tendrils.

**Hint:** Consider the growth habits of each plant. Are they climbers or do they have strong, woody stems?

### Step 4: Evaluate Each Option
- **Dolichos:** This is a climbing plant, but it is not known for having tendrillar stipules.
- **Labab:** This is also a type of legume and does not typically have tendrillar stipules.
- **Acacia:** Acacia species are woody plants that do not require tendrils for support.
- **Smilax:** This is a climber with weak stems, making it likely to have tendrillar stipules.
- **Mango:** Mango is a tree with strong stems and does not have tendrillar stipules.

**Hint:** Identify which plant is known for being a climber and has weak stems.

### Step 5: Conclusion
Based on the analysis, the plant that has tendrillar stipules is **Smilax**. This is because Smilax is a climbing plant that requires support, and its stipules have modified into tendrils to assist in climbing.

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