A meristematic region present between xylem and phloem of open vascular bundle is called :

Options

A. Medullary ray
B. Pericycle
C. Pith
D. Intrafascicular cambium

Answer

To solve the question regarding the meristematic region present between xylem and phloem of an open vascular bundle, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Vascular Bundles**:
- Vascular bundles consist of two main components: xylem and phloem. Xylem is responsible for water transport, while phloem transports nutrients.

2. **Identify the Types of Vascular Bundles**:
- There are two types of vascular bundles: open and closed. In open vascular bundles, there is a presence of cambium, while in closed vascular bundles, cambium is absent.

3. **Locate the Cambium**:
- The cambium is a layer of meristematic tissue located between the xylem and phloem in open vascular bundles. This tissue is responsible for secondary growth in plants.

4. **Define the Cambium**:
- The cambium is a type of meristematic tissue that can divide and contribute to the growth of the plant. In the context of vascular bundles, it allows for the increase in thickness of stems and roots.

5. **Differentiate Between Types of Cambium**:
- The cambium present between the xylem and phloem is specifically referred to as "interfascicular cambium." This term indicates its location between the vascular tissues.

6. **Conclude with the Answer**:
- Therefore, the meristematic region present between xylem and phloem of an open vascular bundle is called **interfascicular cambium**.

### Final Answer:
Interfascicular cambium

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