Meristematic tissue (vascular cambium) produces secondary growth. In plant stems, this serves to increase the diameter, and it forms between the primary xylem and phloem.
Lateral meristems. Usually, vascular tissue is produced in the center of the stalk and grows outward continually. The vascular cambium is responsible for the new vascular tissue and the cork cambium produces new dermal coverings.
i think it is vascular cambium layer............ :)
Secondary xylem
The primary growth in vascular plants takes place with the differentiation of vascular tissue from parenchymatous cells and the secondary growth takes place when the intra-vascular and inter vascular cambium adds to the secondary phloem and secondary xylem.
vascular cambium produces secondary phloes and secondary xylem. interfascicular cambium are been between vascular bundles in near stems.
Vascular cambium
woody stems have more xylem than soft stems
Gymnosperm
vascular cambium
The function of vascular cambium in dicots is to give rise to new vascular tissue.
It gives rise to the vascular tissues of phloem and xylem. Thus it helps in the secondary growth of a plant.