The stele is bounded by an endodermis and pericycle. Endodermal cells are barrel shaped and have casparian thickenings on their radical and tangential walls. Pericycle is represented by a single layer of thin walled parenchyma cells.
The vascular bundles are many in number (polyarch) and radial with exarch xylem. In the centre of the stele is a parenchymatous pith.