Artificial systesm of classification were based upon

Options

A. vegetative characters
B. androecium structue
C. habit and habitat
D. all of these.

Explanation

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks about the basis of artificial systems of classification in plants.

2. **Identify Key Concepts**: Artificial classification systems focus on observable characteristics rather than evolutionary relationships.

3. **Know the Origin**: Artificial classification was developed by Carl Linnaeus, who emphasized the importance of morphological traits.

4. **List the Characteristics**: The artificial classification system is based on:
- **Vegetative Characters**: These include features such as the shape, size, and arrangement of leaves, stems, and roots.
- **Androgynous Structures**: This refers to the reproductive structures, particularly the male parts of the flower (stamens).
- **Habit and Habitat**: This refers to the growth form of the plant (e.g., tree, shrub, herb) and the environment in which it grows.

5. **Evaluate the Options**:
- Option 1: Vegetative character - True.
- Option 2: Androgynous structure - True.
- Option 3: Habit and habitat - True.
- Option 4: All of these - This option encompasses all the previous options.

6. **Conclude the Answer**: Since all the mentioned characteristics (vegetative characters, androgynous structures, habit and habitat) are indeed the basis of the artificial classification system, the correct answer is option 4: all of these.

**Final Answer**: The artificial systems of classification were based on all of these: vegetative characters, androgynous structures, and habit and habitat.

---