Name a unisexual flower, which contains only gynoecium.

Explanation

### Step-by-Step Solution:

1. **Understand the Terms**:
- A unisexual flower is one that has either male or female reproductive structures, but not both.
- The male reproductive part is called the stamen (or androsium), while the female reproductive part is called the pistil (or gynoecium).

2. **Identify Flower Types**:
- Flowers can be classified as complete or incomplete. A complete flower has both male and female reproductive organs, while an incomplete flower has only one of the two.
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