Oleander and lettuce are not the same kind of vegetable. Oleander is a variant of long leaf lettuce, the surface of the leaf is smooth, long lance-shaped, fresh taste, contains a lot of dietary fiber and water. Lettuce, also known as lettuce, the surface of its leaves uneven, oblanceolate, oval or elliptic oblanceolate, the tip of the sharp, rounded, containing a large number of carotene.