Vascular bundle that have the ability to form secondary xylem and secondary phloem are seen in
Vascular bundles of dicot stem have the ability to form secondary xylem and secondary phloem because they have cambium between its xylem and phloem. Such vascular bundles are called as open vascular bundles. Closed vascular bundles as seen in leaves, roots and monocot stems do not have the capacity to form secondary vascular tissues.