Many plants produce a modified stem, especially for presentation and multiplication.
The modified stems such as tuber, rhizome, corm, bulb, runner and offset have nodes and internodes and the buds at the nodes sprout under favourable conditions so as to form new plants.
Common examples are – Rhizome-ginger, Tuberpotato, Bulb-onion, Corm-Colocasia, Runner-grass and Offsetwater hyacinth