DENDROLOGY

Detailed explanation-1: -The tissue responsible for the secondary growth in woody stems is the vascular cambium. Vascular cambium is found in between the xylem and phloem in woody stems, it produces xylem to the inside of the stem and phloem to the outside of the stem.

Detailed explanation-2: -We define woody stems as stems with secondary growth, i.e., having wood with a combination of living and non-living cells exterior to the cambium. Collectively, all the tissues beyond the cambium are known as bark.