The single layered epidermis lacks a cuticle. Root hairs appear as unicellular extensions of epidermal cells.
The cortex is well-developed and divided into two zones; a narrow outer layer of closely packed smaller parenchyma cells and a wide inner layer of open larger aerenchyma cells
The inmost area of the cortex is bounded by a prominent endodermis of cells whose walls are heavily suberized, marking the Casparian stip.