A '''tuber''', or '''stem tuber''', is a development of a [[stolon]], or above-ground [[rhizome]]{{Fact|date=February 2007}}, thickened for use as a [[storage organ]]. The tuber usually, though not always, develops when the stolon becomes [[subterranean]], such as in 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]], sometimes called a root tuber, such as a [[sweet potato]] or ''[[Dahlia]]''.
== External links ==
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* [http://www.foodsubs.com/Tubers.html Cook's Thesaurus] has a good inventory of tuber varieties.
