What are coralloid roots in cycads ?

Explanation

### Step-by-Step Solution:

1. **Understanding Cycads**:
- Cycads are a group of plants that belong to the gymnosperms category. Gymnosperms are characterized by having seeds that are not enclosed within an ovary wall.

2. **Definition of Coralloid Roots**:
- Coralloid roots are specialized roots found in cycads, particularly in the genus Cycas.

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