2. Camellia oleifera is an annual or biennial herb of lettuce in Compositae, native to the Mediterranean coast, with short fibrous roots, milky white stems, alternate leaves, oblong to lanceolate flowers and yellow flowers. The suitable germination temperature and growth temperature are 10-25℃.

3. Oiled wheat vegetables are also called oily glutinous rice and perfume lettuce. Lettuce is a compositae plant, native to the Mediterranean coast. Annual or biennial herbs. Fibrous roots, short stems, milky white, alternate leaves, oblong to lanceolate, whole to pinnately parted, lanceolate auricles at the base, slightly bitter or tasteless, head flowers and yellow flowers. The optimum temperature for germination and growth is 10~25℃, indicating that people like to have plenty of sunshine, but if it is too shaded, it is easy to grow white, and the requirements for soil are not strict, so loose and fertile soil is better, and the soil should be kept moist when planting.