Lettuce seems to be a species from Asia. Widely spread as a cultivated species, it can be found sometimes wild.
Herbaceous annual plant of the daisy family. Vero short stems. Bright green leaves, spineless. The lower ones entire, with a short petiole. Upper leaves sessile, more rounded and ovate. Yellow flowers with violet tinges in panicles. Grey fruits with a prominent beak as long as the rest of the fruit,
Lettuce contains: lactucin, acids, leaves, fiber, pectins, vitamins, minerals and amino acids.
