eustele

A eustele is a type of stele, the central vascular cylinder in plant stems and roots, typical of dicotyledonous plants. It is characterized by vascular bundles containing xylem and phloem strands, with parenchymal cells situated between these bundles.1

In herbaceous dicot stems, the vascular tissue, which includes xylem and phloem, is organized into distinct vascular bundles. These bundles are arranged in a ring surrounding a central pith. The cells between the vascular bundles are thin-walled and often store starch. This arrangement is a fundamental aspect of plant anatomy, facilitating the transport of water, minerals, and nutrients throughout the plant.23