rhizome

n. root-like stem which grows horizontally under the surface of the soil and produces new sprouts (Botany)

In botany, a rhizome is a horizontal stem of a plant that is usually found underground and often sends out roots and shoots from its nodes. Good examples of plants with underground rhizomes include medicinally important ginger and turmeric and the economically damaging weeds Johnson grass, bermuda grass and purple nutsedge. The spreading stems of ferns are also rhizomes. Some plants have rhizomes that grow above ground or that sit at the soil surface including some Iris species. Rhizomes may also be referred to as creeping rootstalks, or rootstocks. A stolon is similar to a rhizome, but instead of being the main stem of the plant, which is what a rhizome is, a stolon sprouts from an existing stem and has long internodes and generates new shoots at the end. A good example of a plant that grows with stolons is strawberry. Rhizomes typically have short internodes; they send out roots from the bottom of the nodes and new vertically growing shoots from the top of the nodes.
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Noun
1. a horizontal plant stem with shoots above and roots below serving as a reproductive structure
(synonym) rootstock, rootstalk
(hypernym) stalk, stem

n. rhizome, root-like stem which grows horizontally under the surface of the soil and produces new sprouts (Botany)

n. rhizome, root-like stem which grows horizontally under the surface of the soil and produces new sprouts (Botany)