The index to the plant species found in a particular area is provide in:

Options

A. Flora
B. Monographs
C. Manuals
D. Catalogue

Answer

To solve the question regarding the index to the plant species found in a particular area, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the term that refers to the index of plant species in a specific area.

2. **Identify Key Terms**: The key terms in the question are "index," "plant species," and "particular area."

3. **Recall Relevant Biological Terms**:
- **Flora**: This term refers to the plant life occurring in a particular region or time. It encompasses all the native plant species found in that area.
- **Fauna**: This term is related to animal species in a particular area.
- **Biota**: This term includes all living organisms in a particular area, including fungi.

4. **Determine the Correct Answer**: Since the question specifically asks for the index of plant species, the correct term is "Flora." This term is used to describe the collection of plant species in a specific area.

5. **Eliminate Incorrect Options**: The other options provided (Monograph, manuals, and catalogs) do not specifically refer to the index of plant species. They may relate to documentation or classification but do not directly answer the question.

6. **Final Answer**: Therefore, the index to the plant species found in a particular area is provided in **Flora**.