:: What Is Onion? An onion, also known as the bulb onion or common onion, is a vegetable that is the most widely cultivated species of the genus Allium. The onion plant has a fan of hollow, bluish-green leaves and its bulb at the base of the plant begins to swell when a certain day-length is reached. The bulbs are composed of shortened, compressed, underground stems surrounded by fleshy modified scale (leaves) that envelop a central bud at the tip of the stem. In the autumn (or in spring, in the case of overwintering onions), the foliage dies down and the outer layers of the bulb become more dry and brittle. The crop is harvested and dried and the onions are ready for use or storage. Onions are cultivated and used around the world. As a food item, they are usually served raw, as a vegetable or part of a prepared savoury dish, but can also be eaten cooked or used to make pickles or chutneys. |
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:: Health Benefits
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:: Nutrition
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