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tuber sprouted potato tuber underground stems
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tuber
tuber Tubers of red oca (Oxalis tuberosa).

tuber

plant anatomy
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Also known as: stem tuber
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sprouted potato tuber
sprouted potato tuberThe “eyes” of a potato are clusters of buds in the axils of the scalelike leaves, each of which can grow into a new plant.

tuber, specialized storage stem of certain seed plants. Tubers are usually short and thickened and typically grow below the soil. Largely composed of starch-storing parenchyma tissue, they constitute the resting stage of various plants and enable overwintering in many species. As modified stems, most tubers bear minute scale leaves, each with a bud that has the potential for developing into a new plant. The potato is a typical tuber, as is the Jerusalem artichoke.

The term is also used imprecisely but widely for fleshy roots, corms, or rhizomes of other plants that resemble tubers—e.g., the “tuber” (actually a tuberous root) of a dahlia.

The Editors of Encyclopaedia Britannica This article was most recently revised and updated by Melissa Petruzzello.