(i) Epidermis: The outer layer of the rhizome is called the epidermis. It is unilayered and composed of parenchyma cells.
(ii) Hypodermis: The inner layer of epidermis is called hypodermis or hypodermis. It is furnished on two levels. Made up of sclerenchyma cells.
(iii) Cortex: The inner layer of hypodermis is called cortex. It is multi-layered. It is composed of parenchyma cells. It does not contain intercellular spaces.
(iv) Vascular bundles: Cortex contains multiple vascular bundles. Its vascular bundles are hydrocentric i.e. xylem in the center and phloem around it.