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A rhizome is, in Botany , a usually underground, horizontal Stem of a Plant that often sends out Root s and shoots from its nodes. Rhizomes may also be referred to as creeping rootstalks, or rootstocks. A Stolon is similar to a rhizome, but exists above ground, sprouting from an existing stem.

Many plants have rhizomes that serve to spread the plant by Vegetative Reproduction . Examples are Asparagus , Lily Of The Valley and Sympodial Orchids . The spreading stems of Fern s are also called rhizomes.

A Tuber is a thickened part of a rhizome that has been enlarged for use as a Storage Organ . They are typically high in Starch . An example is the common Potato .