Stele is composed of pith and vascular bundle. On the basis of orientation of xylem and phloem the vascular bundles of stele are classified as collateral, bicollateral and concentric. Pith is formed of large parenchymatous cells.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.