Type of aestivation without overlapping of perianth member is

Options

A. Valvate aestivation
B. Vexillary aestivation
C. Ascendingly imbricate aestivation
D. Twisted aestivation

Answer

To determine the type of aestivation without overlapping of perianth members, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Aestivation**: Aestivation refers to the arrangement of petals or sepals in a flower bud before it opens. It is crucial to identify the different types of aestivation based on how the floral parts are arranged.

2. **Identify Types of Aestivation**: There are several types of aestivation:
- **Valvate Aestivation**: The petals or sepals touch each other at the edges but do not overlap.
- **Vexillary Aestivation**: One petal (the vexillum) is larger and overlaps the two smaller lateral petals.
- **Imbricate Aestivation**: The petals overlap each other, with some petals covering others.
- **Twisted Aestivation**: The petals are arranged in a spiral manner, with each petal overlapping the next.

3. **Focus on Non-Overlapping Types**: Since the question specifically asks for a type of aestivation without overlapping, we need to focus on the types that do not involve any overlapping of petals or sepals.

4. **Identify the Correct Type**: Among the types mentioned, **Valvate Aestivation** is the only type where the petals or sepals are adjacent to each other without overlapping.

5. **Conclusion**: Therefore, the type of aestivation without overlapping of perianth members is **Valvate Aestivation**.

### Final Answer:
The type of aestivation without overlapping of perianth members is **Valvate Aestivation**.

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