Phylloclade is found in

Options

A. Opuntia, Casuarina, Euphorbia
B. only Cacti
C. Cacti, Asparagus
D. Opuntia and Ruscus

Answer

### Step-by-Step Solution:

1. **Understanding Phylloclade**:
- A phylloclade is a modified stem that performs the function of photosynthesis. It is typically flattened and cylindrical in structure, allowing it to maximize surface area for light absorption.

2. **Characteristics of Phylloclade**:
- Phylloclades have nodes and internodes. The nodes may bear leaves, which can be modified into spines, scales, or thorns to minimize water loss.

3. **Adaptation to Environment**:
- Phylloclades are commonly found in xerophytes, which are plants adapted to dry conditions. These adaptations help in reducing water loss through transpiration.

4. **Examples of Plants with Phylloclades**:
- The question asks for specific examples. The plants known to have phylloclades include:
- Opuntia (a type of cactus)
- Casuarina
- Euphorbia

5. **Eliminating Incorrect Options**:
- Other options like "only cacti," "asparagus," and "Ruscus" do not primarily have phylloclades. Asparagus has cladodes (which are similar but not the same), and Ruscus has a structure called a cladode as well.

6. **Conclusion**:
- Based on the characteristics and examples discussed, the correct answer is that phylloclades are found in Opuntia, Casuarina, and Euphorbia.

### Final Answer:
Phylloclade is found in Opuntia, Casuarina, and Euphorbia.