A small rootless aquatic herb in which a portion of leaf foms a tiny sach or bladder which traps water insects is

Options

A. Nepenthes
B. Drosera
C. Utricularia
D. Dionaea

Answer

To solve the question regarding the small rootless aquatic herb that has a portion of its leaf forming a tiny sac or bladder to trap water insects, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Characteristics**: The question describes an aquatic herb that is rootless and has a specialized leaf structure that forms a bladder to trap insects.

2. **Analyze the Options**: The options provided are:
- A) Lepanthes
- B) Drosera
- C) Utricularia
- D) Dionaea

3. **Identify Key Features**:
- The term "bladder" is crucial here. It indicates that the plant has a specialized structure for trapping prey, which is a characteristic of certain carnivorous plants.

4. **Match Characteristics with Options**:
- **Lepanthes**: This is an epiphytic orchid and does not have bladders.
- **Drosera**: Known as sundews, these plants have sticky leaves to trap insects but do not form bladders.
- **Utricularia**: Commonly known as bladderworts, these plants have small bladders that trap aquatic insects and are indeed rootless.
- **Dionaea**: Known as the Venus flytrap, it has a different mechanism for trapping insects and is not aquatic.

5. **Conclusion**: Based on the characteristics and the options, the correct answer is **C) Utricularia**, as it is the only plant that matches the description of being a small rootless aquatic herb with bladder-like structures for trapping insects.

### Final Answer:
The correct answer is **Utricularia**.

---