Which is an endemic plant

Options

A. Nepenthes khasiana
B. Riccia discolor
C. Vernonia cinerea
D. Cynodon dactylon

Answer

### Step-by-Step Solution:

1. **Understanding Endemic Plants**:
- Endemic plants are species that are confined to a specific geographical area. They are not found naturally anywhere else in the world.
- These plants have adapted to the environmental conditions of their specific location.

2. **Identifying an Example**:
- Among the options provided, we need to identify which plant is endemic.
- An example of an endemic plant is **Nepenthes cassiana**, which is a species of pitcher plant found only in India.

3. **Explaining Nepenthes cassiana**:
- Nepenthes cassiana is the only species of pitcher plant that is endemic to India, meaning it is native to this region and does not occur naturally in other parts of the world.
- This plant has adapted to the specific environmental conditions of its habitat.

4. **Reviewing Other Options**:
- The other options provided (Rixia discolor, Vernonia cinerea, and Cynodon dactylon) are not endemic plants. They can be found in other regions and are not restricted to a specific geographical area.

5. **Conclusion**:
- Based on the information discussed, the correct answer to the question "Which is an endemic plant?" is **Nepenthes cassiana**.