A transverse section of a plant material shown the following anatomical features under a microscope :
Thick cuticle , stomata discontinuous sclerenchymatous hypodermis , Armed parenchyma , 'T' shaped sclerenchymatous girdle , Two - conjoint , collateral and open vascular bundle .
the plant material must be a

Options

A. Cycas rachis
B. Cycas leaflet
C. Pinus needle
D. Nerium leaf

Answer

To solve the question regarding the plant material with specific anatomical features, we can analyze each feature step by step:

### Step 1: Identify the Features
The question describes the following anatomical features:
- Thick cuticle
- Discontinuous stomata
- Sclerenchymatous hypodermis
- Armed parenchyma
- 'T' shaped sclerenchymatous girdle
- Two conjoint, collateral, and open vascular bundles

### Step 2: Analyze the Features
1. **Thick Cuticle**: This feature is often found in plants that need to reduce water loss, typically in arid environments. It is a characteristic of many conifers.

2. **Discontinuous Stomata**: This indicates that the stomata are not uniformly distributed, which is common in plants adapted to conserve water, such as those in dry habitats.

3. **Sclerenchymatous Hypodermis**: This suggests a layer of thick-walled cells that provide structural support, often seen in plants that need to withstand harsh conditions.

4. **Armed Parenchyma**: This could refer to parenchyma cells that have additional support or defense mechanisms, which is typical in certain gymnosperms.

5. **'T' Shaped Sclerenchymatous Girdle**: This unique structure is indicative of specific adaptations in certain plant types, particularly in conifers.

6. **Two Conjoint, Collateral, and Open Vascular Bundles**: This describes the arrangement of vascular tissues, which is characteristic of certain gymnosperms.

### Step 3: Compare with Known Plant Types
- **Cycas**: A gymnosperm with pinnate leaves, but has unbranched stems and specific root types.
- **Pinus (Pine)**: A conifer known for needle-like leaves, thick cuticles, and the presence of the features described.
- **Nerium**: A dicot with different anatomical features not matching the description.

### Step 4: Conclusion
Given the analysis of the features, the plant material that matches all the described anatomical features is **Pinus needle**.

### Final Answer
The plant material must be **Pinus needle**.

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