The flask-shaped organ X at the centre of a flower is surrounded by a number of little stalks Y having swollen tops which lie just inside the ring of petals.
Name the organ X.

Answer

To answer the question regarding the flask-shaped organ X at the center of a flower, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organ X**: The question describes a flask-shaped organ located at the center of a flower. This organ is crucial for reproduction in flowering plants.

2. **Recognize the Structure**: The flask shape indicates that this organ is likely involved in the female reproductive process of the flower.

3. **Name the Organ**: Based on the description, the organ X is known as the **carpel**. The carpel is the female reproductive part of the flower and is also referred to as the **gynoecium**.

4. **Surrounding Structures**: The question mentions that organ X is surrounded by little stalks Y with swollen tops. These stalks are indicative of the male reproductive structures of the flower.

5. **Identify the Stalks Y**: The little stalks Y are known as **stamens**. Each stamen consists of a filament (the stalk) and an anther (the swollen top where pollen is produced).

6. **Conclusion**: Therefore, the answer to the question is:
- Organ X is the **carpel**.
- Organ Y (the little stalks) is the **stamens**.

### Final Answer:
The organ X is the **carpel**.