1. In Colocasia and Amorphophallus corm is present, which is an underground stem modified for storage of food.
2. Corm is swollen underground spherical or subspherical vertically growing stem.
3. It is condensed structure with circular or ring like nodes.
4. It shows presence of axillary buds and scales.
5. Adventitious buds are produced which help in vegetative propagation.
6. Adventitious roots are produced at lower part of the stem.
