The type of inflorescence characterized by having dimorphic flower is

Options

A. Catkin
B. Umbel
C. Corymb
D. Capitulum

Answer

To solve the question about the type of inflorescence characterized by having dimorphic flowers, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a type of inflorescence that has dimorphic flowers. Dimorphic flowers refer to flowers that come in two different forms.

2. **Identify the Options**: The options provided are:
- A) Catkin
- B) Umbel
- C) Spike
- D) Capitulum

3. **Analyze Each Option**:
- **Catkin**: This type of inflorescence has an elongated axis and typically bears unisexual flowers. Since it does not have dimorphic flowers, this option is incorrect.
- **Umbel**: An umbel has a shortened axis and also typically bears unisexual flowers. Therefore, this option is also incorrect.
- **Spike**: Similar to the catkin, a spike has a shortened axis and bears unisexual flowers, making this option incorrect as well.
- **Capitulum**: This type of inflorescence has a flattened axis and is characterized by having sessile flowers arranged on a flat surface. It can have flowers of different forms, thus fitting the definition of dimorphic flowers.

4. **Conclusion**: Based on the analysis, the correct answer is **Capitulum** as it is the type of inflorescence characterized by having dimorphic flowers.

### Final Answer:
The type of inflorescence characterized by having dimorphic flowers is **Capitulum**.

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