Which type of phyllotaxy is present in Alstonia ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Phyllotaxy**:
- Phyllotaxy refers to the arrangement of leaves on a plant stem or branch. It is crucial for optimizing light capture for photosynthesis.

2. **Importance of Leaf Arrangement**:
- The arrangement of leaves is designed to maximize light exposure and minimize shading of lower leaves, which enhances photosynthesis and overall plant productivity.

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