<Li> IU = International units </Li> <Tr> <Td_colspan="2"> Percentages are roughly approximated using US recommendations for adults . Source: USDA Nutrient Database </Td> </Tr> <P> The leek is a vegetable, a cultivar of Allium ampeloprasum, the broadleaf wild leek . The edible part of the plant is a bundle of leaf sheaths that is sometimes erroneously called a stem or stalk . The genus Allium also contains the onion, garlic, shallot, scallion, chive, and Chinese onion . </P> <P> Historically, many scientific names were used for leeks, but they are now all treated as cultivars of A. ampeloprasum . The name' leek' developed from the Old English word leac . Two closely related vegetables, elephant garlic and kurrat, are also cultivars of A. ampeloprasum, although different in their uses as food . </P>

Are leeks and onions in the same family