Pteridium possess

Options

A. Polycyclic dictyostele
B. Actinostele
C. Siphonostele
D. Amphiphloic siphonostele.

Answer

To answer the question "Pteridium possesses," we need to analyze the options provided regarding the types of steel present in Pteridium, a genus of ferns.

### Step-by-Step Solution:

1. **Understanding the Types of Steel**:
- The question presents four types of vascular structures (steels) found in plants: polycyclic dictyosteel, actinosteel, siphonosteel, and amphiphloic siphonosteel. Each type has distinct structural characteristics.

2. **Identifying Pteridium**:
- Pteridium is a genus of ferns, which are classified under the group of plants known as pteridophytes. Understanding the specific type of steel present in Pteridium is crucial.

3. **Analyzing Each Option**:
- **Polycyclic Dictyosteel**: This type consists of vascular cylinders (xylem and phloem) that are arranged in a network or longitudinal series. It is characteristic of certain pteridophytes.
- **Actinosteel**: This structure has a star-like appearance with pith surrounded by xylem and phloem. It is not typically associated with Pteridium.
- **Siphonosteel**: This type features a core of pith surrounded by concentric layers of xylem and phloem. It is also not the main type found in Pteridium.
- **Amphiphloic Siphonosteel**: This structure has phloem on both sides of the xylem, forming a ring-like structure. It is not characteristic of Pteridium.

4. **Conclusion**:
- After analyzing the options, it is clear that Pteridium possesses **polycyclic dictyosteel**. This is the correct answer as it aligns with the known structure of vascular tissues in Pteridium.

### Final Answer:
Pteridium possesses polycyclic dictyosteel.