The velamen tissue occurs in .........

Explanation

**Step-by-Step Solution:**

1. **Understanding Velamen Tissue**: Velamen tissue is a specialized type of tissue found in certain plants. It is important to identify its location and function.

2. **Location of Velamen Tissue**: Velamen tissue is primarily found in the root cortex of certain plants, particularly epiphytic orchids and some other tropical plants.

3. **Function of Velamen Tissue**: The main functions of velamen tissue include:
- Protecting the plant from harmful UV radiation.
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