The cross section of a plant material shows the following anatomical featrues under microscope:
(a) Sclerenchymatous bundle sheath
(b) Many vascular bundles are scattered in parenchymatous ground tissues, each vascular bundle is surrounded by sclerenchymatous bundle sheath.
(c) Vascular bundles are usually oval shaped.
(d) Vascular bundles are conjoint, collateral & closed and xylem is endarch
(e) Phloem parenchyma is absent and water containing cavities are present within the vascular bundles:
The plant material should be:

Answer

To determine the type of plant material based on the provided anatomical features, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Presence of Sclerenchyma**:
- The cross-section shows a sclerenchymatous bundle sheath. Sclerenchyma is a type of supportive tissue that provides strength and rigidity to the plant.

**Hint**: Look for supportive tissues that indicate structural strength.

2. **Analyze the Vascular Bundles**:
- The vascular bundles are described as being scattered within parenchymatous ground tissues. Each vascular bundle is surrounded by a sclerenchymatous bundle sheath, which is a characteristic feature of certain plant types.

**Hint**: Consider how the arrangement of vascular bundles relates to the type of plant (e.g., monocot vs. dicot).

3. **Shape of Vascular Bundles**:
- The vascular bundles are oval-shaped. This shape can help differentiate between types of plants.

**Hint**: The shape of vascular bundles can indicate whether the plant is a monocot or dicot.

4. **Type of Vascular Bundles**:
- The vascular bundles are described as conjoint, collateral, and closed. This means that the xylem and phloem are located together on the same radius and that there is no cambium present, which is typical for monocots.

**Hint**: Remember that the absence of cambium is a key feature of closed vascular bundles.

5. **Xylem Arrangement**:
- The xylem is described as endarch, meaning that the protoxylem is located towards the center of the bundle. This arrangement is characteristic of stems in monocots.

**Hint**: Endarch xylem is a distinguishing feature of stem anatomy in monocots.

6. **Presence of Phloem Parenchyma**:
- The absence of phloem parenchyma and the presence of water-containing cavities within the vascular bundles further support the identification of the plant material.

**Hint**: The absence of certain types of cells can provide clues about the plant's classification.

7. **Conclusion**:
- Based on the combination of these features (sclerenchymatous bundle sheath, scattered vascular bundles, oval shape, conjoint collateral closed vascular bundles, endarch xylem, and absence of phloem parenchyma), we can conclude that the plant material is characteristic of a monocot stem.

**Final Answer**: The plant material should be identified as a **monocot stem**.