Pink Onion

The onion (Allium cepa) , also known as the bulb onion or common onion, is used as a vegetable and is the most widely cultivated species of the genusAllium. This genus also contains several other species variously referred to as onions and cultivated for food, The name "wild onion" is applied to a number of Allium species but A. cepa is exclusively known from cultivation and its ancestral wild original form is not known, although escapes from cultivation have become established in some regions. The onion is most frequently a biennial or aperennial plant, but is usually treated as an annual and harvested in its first growing season.