A rooted floating leaved hydrophyte is

Options

A. Nymphaea
B. Hydrilla
C. Ceratophyllum
D. Eichhornia.

Answer

To solve the question "A rooted floating leaved hydrophyte is," we need to identify which of the given options represents a plant that has roots anchored in the substrate (ground) and leaves that float on the surface of the water.

### Step-by-Step Solution:

1. **Understand the Definition**: A rooted floating-leaved hydrophyte is a type of aquatic plant that has its roots anchored in the soil at the bottom of a water body, while its leaves float on the surface of the water.

2. **Analyze the Options**: The options provided are:
- Nymphaea
- Hydrilla
- Ceratophyllum
- Eichhornia

3. **Evaluate Each Option**:
- **Nymphaea**: This is commonly known as the water lily. It has roots that are anchored in the soil at the bottom of the water body, and its leaves and flowers float on the surface of the water. This matches the definition of a rooted floating-leaved hydrophyte.
- **Hydrilla**: This plant is completely submerged and does not have floating leaves. It grows underwater and does not fit the definition.
- **Ceratophyllum**: Similar to Hydrilla, this plant is also submerged and does not have floating leaves. It grows entirely underwater.
- **Eichhornia**: Known as water hyacinth, this plant floats on the water surface but does not have roots that are anchored in the substrate; instead, its roots dangle in the water.

4. **Conclusion**: Based on the analysis, the only plant that fits the description of a rooted floating-leaved hydrophyte is **Nymphaea** (water lily).

### Final Answer:
The rooted floating-leaved hydrophyte is **Nymphaea**.

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