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: -Vascular plants have well-developed systems of internal tubes which conduct food and water. Trees and shrubs-which are also vascular plants-are distinguished by woody stems and roots and so are given a separate grouping on this site.

Detailed explanation-3: -The basic function of xylem is to transport water from roots to stems and leaves, but it also transports nutrients. The word xylem is derived from the Ancient Greek word (xylon), meaning “wood"; the best-known xylem tissue is wood, though it is found throughout a plant.