For the fungal genus, see Truffle.

A tuber is a part of a rhizome thickened for use as a storage organ. It is usually, though not always, subterranean, such as a potato. This modified stem forms at the end of a lateral branch. Auxiliary buds are located at the nodes. When the buds develop, adventitious roots and rhizomes form below them.

This should not be confused with a tuberous root such as a sweet potato or Dahlia, which is a similarly swollen root.

See also

• Rhizome
• Corm
• Bulb

Plant anatomy | Plant morphology | Plant reproduction

Knold (botanik) | Pflanzenknolle | Tubérculo | Tubero | Tubercule | Tubero | פקעת | Bulwa | Tubérculo