1. Type: Lettuce, lettuce of the Asteraceae family, an annual or biennial herb. Lettuce can be divided into leaves and stems.

Lettuce, a variant of Lactuca lettuce in the Asteraceae family, is an annual herb.

2. Title: There are many names for lettuce. In this cursive script, it is called "Lingyuan vegetable", "lettuce" and "chicory". Leaf lettuce is also called lettuce, and stem lettuce is also called lettuce and bamboo shoots. China has more lettuce cultivation area than romaine lettuce.

Romaine, lettuce, lettuce sprouts, green sprouts and lettuce.

3. Impact: The meat of lettuce is tender and the stems can be eaten raw, cold, fried, dried or pickled. Lettuce is eaten mainly on the leaves or leaves. In recent years, it has grown in metropolitan areas, especially in southern provinces, and has become the primary vegetable to add fancy varieties. Lettuce stems and leaves contain lettuce, which tastes bitter and has a bitter taste during high temperature and drought. It can enhance gastric juice, promote digestion, increase appetite, and has analgesic and hypnotic effects.

4. Surface: Lettuce. According to the "Compendium of Materia Medica", "Lettuce is planted in mid-spring and is most suitable for fertile fields. Its leaves are pointed like white chicory, slightly green in color, and white on the hands. Juice. It sprouts in April and is three to four feet tall. It tastes like zucchini when peeled and eaten raw. "According to this record, raw lettuce, or pickled lettuce, has been around since ancient times.

Lettuce has an erect stem, solitary, with panicle branches above, all stems and branches red. Basal leaves and lower stems and leaves are large, unlobed, oblanceolate, oval or elliptical, 6-15 cm long, 1.5-6.5 cm wide, with a pointed tip, short tapering or rounded shape, sessile, base The stem is heart-shaped or half-arrow-shaped, with wavy or finely serrated edges, gradually tapering upwards, the same shape as the basal leaves and lower stem leaves or lanceolate, and the panicle branches into lower leaves and panicles. Most or most of the flower heads are arranged in panicles at the tops of stems and branches.