radial system

The term "radial system" in plant anatomy refers to vascular rays. These rays extend outward from the central vascular bundles in a stem, assisting in the conduction of materials from the vascular bundles to the adjacent tissues.1

Vascular plants have a vascular system composed of xylem and phloem. Xylem transports water and minerals from the roots to the leaves, while phloem moves food from the leaves to other parts of the plant. In dicots, vascular tissues are arranged in a way that surrounds a central pith, with vascular rays extending radially. In contrast, monocots have scattered vascular bundles throughout the stem.1