Dionaea is rootless aquatic herb which form leaf bladders to trap insect.

Explanation

**Step-by-Step Solution:**

1. **Identify the Plant:** The question refers to "Dionaea," which is commonly known as the Venus Flytrap.

2. **Examine the Characteristics:** The statement claims that Dionaea is a rootless aquatic herb. However, the Venus Flytrap is known to be a terrestrial plant, meaning it grows in soil.

3. **Assess the Root System:** The Venus Flytrap has a well-developed root system. This contradicts the claim that it is rootless.

...