Arrangement of floral members which are partly spiral and partly in whorl is

Options

A. Cyclic
B. Acyclic
C. Harmicyclic
D. Pentacyclic.

Answer

To solve the question regarding the arrangement of floral members that are partly spiral and partly in whorl, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- First, we need to understand the terms used in the options: cyclic, acyclic, hemicyclic, and pentacyclic.

2. **Analyze Each Option**:
- **Cyclic**: In cyclic arrangements, floral organs are arranged in regular whorls at the nodes of the thalamus. Examples include hibiscus and Datura.
- **Acyclic**: In acyclic arrangements, the thalamus is conical or convex, and floral parts are spirally arranged. Examples include water lily and Magnolia.
- **Hemicyclic**: In hemicyclic arrangements, sepals and petals are arranged in regular whorls, while stamens and carpels are arranged spirally. Examples include Anona and Polyalthia.
- **Pentacyclic**: This term refers to the presence of five cyclic whorls.

3. **Identify the Correct Arrangement**:
- The question specifically asks for an arrangement that is partly spiral and partly in whorl.
- The hemicyclic arrangement fits this description perfectly, as it has sepals and petals in whorls and stamens and carpels in a spiral arrangement.

4. **Conclusion**:
- Therefore, the correct answer to the question is **hemicyclic**.

### Final Answer:
The arrangement of floral members which are partly spiral and partly in whorl is **hemicyclic**.

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