For 10 points, identify this actively dividing lateral meristem tissue which is found between the xylem and phloem cells.
The KNOX genes play a role in the growth and coordination of this tissue. When the fusiform initials of this tissue are of a uniform size, this tissue is called "stratified," and the fusiform initials give rise to cells which possess an axial orientation. This tissue's isodiametric ray initials give rise to parenchymatous cells.  It is responsible for the secondary growth of dicotyledenous plants, and unlike the cork cambium, this tissue gives rise to secondary xylem and phloem cells. For 10 points, identify this actively dividing lateral meristem tissue which is found between the xylem and phloem cells.
The KNOX genes play a role in the growth and coordination of this tissue.
{vascular cambium} [accept {apical meristem} for the first sentence; prompt on partial]