Rhizome

In botany, a rhizome is a usually-underground, horizontal stem of a plant that often sends out roots and shoots from its nodes. They are also referred to as creeping rootstalks, or rootstocks. A stolon is similar to a rhizome, but exists above ground, sprouting from an existing stem.

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Many plants have rhizomes that serve to spread the plant by vegetative reproduction. Examples are asparagus and Lily of the valley. The spreading stems of ferns are also called rhizomes.

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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.

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Botany: :For other meanings, see Botany (disambiguation)...

Stem: In common parlance, a stem is any elongated, usually narrow, extension or supporting structure of an object. Examples are the stem of a smoking pipe, stem of a cut flower, stem of a wine glass, etc. Uses of the term specific to certain fields are as follow:...

Plant: Land plants (embryophytes)Non-vascular plants (bryophytes)Hepaticophyta - liverwortsAnthocerotophyta - hornwortsBryophyta - mossesVascular plants (tracheophytes)Lycopodiophyta - clubmossesEquisetophyta - horsetailsPteridophyta - "true" fernsPsilotophyta - whisk fernsOphioglossophyta - adderstonguesS...