Giorgio Samorini has suggested that the lettuce depicted so frequently in ancient Egyptian depcitions is the wild lettuce Lactuca serriola. Lettuce in Ancient Egypt was part of the dietary intake and frequently shown among the offerings for the deceased. It was also considered to be an aphrodisiac. "The ancient Egyptians used lettuce as an aphrodisiac, according to an Italian researcher who claims to have solved a century-old archaeological puzzle . . . . The plant has oblong, prickly-edged, leaves with a milky sap that runs when broken off . . . . Samorini tested the phytochemicals present in the latex, or lactucarium, with a series of experiments, and discovered that lettuce has a double, opposite effect, depending on the dose. 'Tests showed that 1 gram of lactucarius induces calming and pain killing effects because of the presence of lactucin and lactucopicrin. At the highest doses [2 to 3 grams], the stimulating effects of tropane alkaloids prevail,' says Samorini. This finally solves an ethnobotanical riddle and explains the association between Min and lettuce." See the article for more.