Explain the process of formation of vascular cambium.
The portion of conjunctive parenchyma or tissue present below the phloem bundles dedifferentiates to form brick-shaped cells of vascular cambium. The process of dedifferentiation of conjunctive parenchyma spreads laterally between xylem and phloem bundles. The portion of the pericycle in contact with protoxylem also becomes meristematic. It produces a complete continuous wavy ring of vascular cambium that passes from below the phloem bundles to above the xylem bundles.