DENDROLOGY

Detailed explanation-1: -Together with phloem (tissue that conducts sugars from the leaves to the rest of the plant), xylem is found in all vascular plants, including the seedless club mosses, ferns, horsetails, as well as all angiosperms (flowering plants) and gymnosperms (plants with seeds unenclosed in an ovary).

Detailed explanation-2: -Where are the xylem and phloem located? The xylem is located towards the adaxial surface of the leaf, whereas, phloem is located towards the abaxial surface of the leaf.

Detailed explanation-3: -Non-vascular plants are plants without a vascular system consisting of xylem and phloem. Instead, they may possess simpler tissues that have specialized functions for the internal transport of water.

Detailed explanation-4: -Xylem is found in all vascular plants, including gymnosperms and angiosperms. Xylem cell types show great variability across different plant groups, from species to species, and even within the same plant.