An inflorescene with single, oldest, female flower and many younger male flowers has to be

Options

A. verticillaster
B. hypanthodium
C. spike
D. cyathium

Answer

To solve the question regarding the type of inflorescence that has a single oldest female flower surrounded by many younger male flowers, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify the type of inflorescence that features one prominent female flower and multiple male flowers.

2. **Analyze the Options**: The options provided are:
- Mixed inflorescence
- Hypanthodium
- Spike
- Cyathium

3. **Define Each Option**:
- **Mixed Inflorescence**: This type includes both male and female flowers but does not specifically describe the arrangement of one oldest female flower with many younger male flowers.
- **Hypanthodium**: This is a type of inflorescence that is box-like and does not fit the description of having a single oldest female flower surrounded by younger male flowers.
- **Spike**: In a spike, flowers are attached directly to the stem without pedicels, but again, it does not match the specific arrangement described in the question.
- **Cyathium**: This type of inflorescence is characterized by having a single central female flower surrounded by multiple male flowers.

4. **Identify the Correct Answer**: Based on the definitions and characteristics of the inflorescence types, the correct answer is **Cyathium**. This fits the description of having one oldest female flower at the center with many younger male flowers surrounding it.

### Conclusion:
The answer to the question is **Cyathium**.

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