All are lateral meristems except -

Options

A. Fascicular/ vascular cambium
B. Interfascicular cambium
C. Apical and intercalary meristem
D. Phellogen

Answer

To answer the question "All are lateral meristems except -", we need to understand the different types of meristems in plants.

### Step-by-Step Solution:

1. **Define Meristems**: Meristems are regions in plants where cells continuously divide, leading to growth. They can be classified into three main types: apical, lateral, and intercalary meristems.

2. **Identify Lateral Meristems**: Lateral meristems are responsible for the secondary growth of plants, which increases the thickness of stems and roots. The primary types of lateral meristems are:
- **Vascular Cambium**: This produces secondary xylem (wood) and phloem.
- **Cork Cambium**: This produces the outer protective layer of the plant.

3. **Identify Other Types of Meristems**:
- **Apical Meristem**: Located at the tips of roots and shoots, responsible for primary growth (length).
- **Intercalary Meristem**: Found at the base of leaves or internodes, allowing for regrowth after cutting or grazing.

4. **Analyze the Options**: The question asks which of the following is not a lateral meristem. Based on the definitions:
- **Fascicular Cambium**: A type of vascular cambium, thus a lateral meristem.
- **Interfascicular Cambium**: Also part of the vascular cambium, thus a lateral meristem.
- **Intercalary Meristem**: This is not a lateral meristem; it is involved in the elongation of stems and leaves.

5. **Conclusion**: The correct answer is **Intercalary Meristem**, as it is not a lateral meristem.

### Final Answer:
All are lateral meristems except **Intercalary Meristem**.