Sunflower is a heterogamous type of capitulum.

Explanation

**Step-by-Step Solution:**

1. **Understanding Heterogamous:**
- Heterogamous refers to a reproductive system that contains both male and female reproductive organs. In the case of the sunflower, it has both types of flowers, which means it can produce both pollen (male) and ovules (female).

2. **Identifying the Inflorescence Type:**
- The sunflower has a specific type of inflorescence known as a "capitulum." This is characterized by a dense cluster of flowers that appear to form a single flower head.

...