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Botanists distinguish between true bulbs, corms, rhizomes, stem tubers and tuberous roots, any of which may be termed "bulbs" in horticulture. Bulb species usually lose their upper parts during adverse conditions such as summer drought and heat or winter cold.
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).
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.
In the summer, with hot and dry conditions the plant becomes dormant, with all the above ground parts dying back. Colder temperatures in winter then activate the corms. [9] Propagation occurs sexually by seed and asexually by small corms, called cormels or cormlets, produced in the axils of the corms (between tunic scales and body of corm). [10]
Corms are solid enlarged underground stems that store nutrients in their fleshy and solid stem tissue and are surrounded by papery leaves. Corms differ from bulbs in that their centers consists of solid tissue while bulbs consist of layered leaves. [24] Examples of plants that use corms are gladiolus and taro.
Winter storms can bring all sorts of precipitation: snow, sleet, hail, freezing rain or even plain old rain. Why so much variety? The answer involves temperature changes as the precipitation falls.
As the planet continues to get hotter, humans are at greater risk for heat-related illness and death but an index aims to avoid such.
Taro corms. Corm. Amorphophallus konjac (konjac) Colocasia esculenta (taro) Eleocharis dulcis (Chinese water chestnut) Ensete spp. (enset) Nymphaea spp. (waterlily) Pteridium esculentum; Sagittaria spp. (arrowhead or wapatoo) Typha spp. Xanthosoma spp. (malanga, cocoyam, tannia, yautia and other names) Colocasia antiquorum (eddoe or Japanese ...