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Lettuce plants grow as a rosette of leaves on the ground
or on a short stalk. As the plant matures, the leaves
increase in number. There are two main types of
lettuce, head and leaf.
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Head lettuce is in the shape of a ball and made up of a
series of overlapping leaves attached at the bottom to a
stem plate. Head lettuce and head cabbage can be similar in
appearance, but lettuce leaves are usually thinner and less
tightly wrapped.
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Romaine lettuce is an upright, lettuce arranged in an
elongated, loose head.
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Lettuce - Plant
