1. Cuticle is absent at root.
2. Its rhizome is unicellular.
3. It has no hypodermis.
4. The cortex is not organized into different layers.
5. The endothelium is composed of single cells and the cells contain Caspian ribbons.
6. The pericycle is composed of single cells.
7. Vascular bundles are anterior.
8. Protoxylem towards the periphery and metaxylem towards the center i.e. exarch.
9. Its xylem or phloem bundles number 2-6.
10. Marrow is very small.