Different types of stems: axis of a plant.
Stolon: running stems, which trail above the ground.
Tuber: subterranean swellings of plant axes.
Volubilate twining: a stem that will wind around objects for support.
Section of a bulb: division of a bulb that allows study of the interior.
Bulb: plant organ that allows for the growth of the plant every year.
Rhizome: stem that annually produces adventitious roots.