1, the difference between the types of Although oil wheat lettuce and lettuce are both green plants belonging to the genus Asparagus, lettuce has been grown for a long time, and was often eaten as a child. It is one of the more common vegetables I remember. Oleander is a popular vegetable and fruit in recent years. It is a variant of the leafy bamboo shoot. It is called long leaf lettuce. Because of its long leaves and high nutritional content, it is now quite popular in the market and has slowly replaced lettuce.2. Differences in AppearanceIt is easy to see from their designs that their leaves are different. Oleander is a kind of long leaf lettuce, so its leaves are longer and thinner with smooth surface and bright green color. But lettuce has more spacious leaves with many prominent meridians and jagged surfaces, and the leaves are not as long and dark green in color as lettuce. Their stems, however, are the opposite. The stems of oleander are short and thin, and generally not very good to hold, while the stems of lettuce are long and thick, and can still be held.