List of some of the plant materials is given below:
* Dicotyledonae root
* Monocotyledonae root
* Dicotyledonae stem
* monocotyledonae stem
Which plant material have sclerenchymatous pericycle in patches located just above phloem bundles in the primary internal structure.

Answer

To determine which plant material has a sclerenchymatous pericycle in patches located just above the phloem bundles in the primary internal structure, we can analyze the given options step by step.

### Step-by-Step Solution:

1. **Understand the Structure of Pericycle:**
- The pericycle is a layer of cells located just inside the endodermis in roots and stems. Its composition can vary among different plant types.

2. **Analyze Dicotyledonae Root:**
- In dicot roots, the pericycle is typically a single layer of parenchyma cells, which means it does not have sclerenchyma tissue in patches. Therefore, this option can be eliminated.

3. **Analyze Monocotyledonae Root:**
- Similar to dicot roots, monocot roots also have a pericycle that is usually made up of parenchyma cells and is continuous. Hence, this option can also be eliminated.

4. **Analyze Dicotyledonae Stem:**
- In dicot stems, the pericycle is made up of sclerenchyma tissue, which is present in patches located just above the phloem bundles. This matches the requirement stated in the question.

5. **Analyze Monocotyledonae Stem:**
- In monocot stems, the pericycle is generally absent. Therefore, this option can be eliminated.

6. **Conclusion:**
- The only plant material that has a sclerenchymatous pericycle in patches located just above the phloem bundles is the **Dicotyledonae Stem**.

### Final Answer:
**Dicotyledonae Stem**