Interfascicular Cambium is a cambium found in between vascular bundles (primary xylem and primary phloem).
It forms the secondary meristems.
The parenchymatic cells of medullary rays differentiate and become meristematic and form the interfascicular cambium.
Interfascicular cambium along with the intrafascicular cambium present between primary xylem and primary phloem forms a continuous ring of vascular cambium.