Vegetative propagation in Pistia occurs by

Options

A. Runner
B. Sucker
C. Stolon
D. Offset

Answer

To determine how vegetative propagation occurs in Pistia, we need to analyze the options provided: runner, sucker, stolon, and offset.

### Step-by-Step Solution:

1. **Understanding the Options**:
- **Runner**: A slender, creeping aerial stem that grows horizontally above the ground and produces new plants at its nodes.
- **Sucker**: A sub-aerial branch that arises from the stem below the surface of the earth and grows upwards to form a new plant.
- **Stolon**: Similar to a runner but is longer and more slender, often arching due to its length.
- **Offset**: A short, thick stem that produces a cluster of roots and leaves at its end, typically found in aquatic plants.

2. **Identifying the Type of Vegetative Propagation in Pistia**:
- Pistia, commonly known as water lettuce, is an aquatic plant. It reproduces vegetatively through offsets.
- Offsets are characterized by their short and thick stems that produce a tuft of roots and leaves at their ends, which is typical for plants that grow in water.

3. **Conclusion**:
- Based on the characteristics of the vegetative propagation methods discussed, the correct answer for how vegetative propagation occurs in Pistia is **offset**.

### Final Answer:
Vegetative propagation in Pistia occurs by **offset**.

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