Various species of this plant were known to the ancients. Its type is supposed to be the Lactuca quercina, or the Lactuca scariola; both of Asiatic origin. Many powerful effects were formerly attributed to its use. It was considered as producing sleep, and recovery from intoxication; it was in consequence of this belief that this salad was served up after meals. Thus Martial tells us,

Claudere quÆ coenas Lactuca solebat avorum,
Die mihi cur nostras inchoat illa dapes.

Columella thus describes its properties:

Jamque salutari properet Lactuca sapore
Tristia quÆ relevet longi fastidia mori.

This belief in its narcotic qualities induced the ancients to esteem it as an aphrodisiac: the Pythagoreans had therefore named it e????????; and Eubulus calls it the food of the dead, mortuorum cibum. Venus covered the body of her beloved Adonis with lettuce-leaves to calm her amorous grief; and vases, in which they were planted, were introduced in the Adonian festivals. Galen, who had faith in its powers, called it the herb of sages, and in his sleepless nights sought its influence by eating it at supper. It was also frequently put under the pillow of the rich to lull them to repose. Its cooling qualities were so much dreaded by the Roman gallants, that its use was abandoned; but Augustus’s physician, Antonius Musa, having calmed by its prescription his master’s uneasiness in a hypochondriac attack, lettuce recovered its popularity: a statue was erected to the doctor, and salad once more became the fashion, although the prejudices against it could not be removed. Lobel informs us that an English nobleman, who had long wished for an heir, but in vain, was blessed with a numerous family by leaving off this Malthusian vegetable.