Type of phyllotaxy in Alstonia

Options

A. Alternate
B. Opposite ducussate
C. Opposite superposed
D. Whorled

Answer

### Step-by-Step Solution:

1. **Understanding Phyllotaxy**: Phyllotaxy refers to the arrangement of leaves on the stem or branch of a plant. This arrangement is crucial as it affects light exposure and photosynthesis efficiency.

2. **Types of Phyllotaxy**: There are three main types of phyllotaxy:
- **Alternate**: In this arrangement, a single leaf arises from each node, and the leaves are positioned at different heights along the stem.
- **Opposite**: In this type, two leaves arise from the same node, positioned directly opposite each other.
- **Whorled (or Verticillate)**: In whorled phyllotaxy, more than two leaves arise from a single node, forming a circular arrangement around the stem.

3. **Identifying the Type in Alstonia**: The question specifically asks for the type of phyllotaxy found in Alstonia. According to the information provided, Alstonia exhibits whorled phyllotaxy.

4. **Conclusion**: Therefore, the type of phyllotaxy in Alstonia is **whorled** (option D).

### Final Answer:
The type of phyllotaxy in Alstonia is **whorled**.

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