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Storage organs may act as perennating organs ('perennating' as in perennial, meaning "through the year", used in the sense of continuing beyond the year and in due course lasting for multiple years). These are used by plants to survive adverse periods in the plant's life-cycle (e.g. caused by cold, excessive heat, lack of light or drought).
A geophyte (earth+plant) is a plant with an underground storage organ including true bulbs, corms, tubers, tuberous roots, enlarged hypocotyls, and rhizomes. Most plants with underground stems are geophytes but not all plants that are geophytes have underground stems. Geophytes are often physiologically active even when they lack leaves.
See Raunkiær plant life-form for a classification of perennating organs. Resting buds are a perennating organ, but not a storage organ. The stem (body) of a cactus is generally regarded as having been modified to act as a water storage organ, but it's not a perennating organ, in that it's not what the cactus dies back to in an adverse period.
A root tuber, tuberous root or storage root is a modified lateral root, enlarged to function as a storage organ. The enlarged area of the tuber can be produced at the end or middle of a root or involve the entire root. It is thus different in origin, but similar in function and appearance, to a stem tuber.
Corm, bulbo-tuber, or bulbotuber is a short, vertical, swollen underground plant stem that serves as a storage organ that some plants use to survive winter or other adverse conditions such as summer drought and heat (perennation).
Storage organ From the plural form : This is a redirect from a plural noun to its singular form. This redirect link is used for convenience; it is often preferable to add the plural directly after the link (for example, [[link]]s ).
Dioscorea bulbifera is a perennial vine with broad, alternate leaves, and two types of storage organs. The plant forms bulbils in the leaf axils of the twining stems, and tubers beneath the ground. These tubers are like small, oblong potatoes. Some varieties are edible and cultivated as a food crop, especially in West Africa. The tubers of ...
Storage pattern is a root axis swollen near the apical portion, thus forming a bulbous or tuberous structure at or near the root tip. It is commonly seen associated with a rhizomatous stem. It is seen in Costus speciosus , [ 12 ] Curcuma amada , [ 12 ] [ 13 ] Curcuma domestica , Asparagus sprengeri , Arrowroot ( Maranta ), etc. [ 13 ] and some ...