They were of modest size with an underground stem, but without spreading roots.

People use the underground stem (rhizome) and the root as medicine.

However, a very small number of plants have multiple rosettes connected by an underground stem.

People use the underground stem (rhizome) of blue flag to make medicine.

The root and rhizome (underground stem) are used to make medicine.

The energy is stored in an underground stem called a corm.

It has the largest tuber (underground stem) of any plant.

The leaf and underground stem are used to make medicine.

The horizontal underground stem (rhizome) is used to make medicine.

This underground stem has sometimes been called a rhizome, or at least rhizome-like.