lamb’s lettuce, (Valerianella locusta), weedy plant of the family Caprifoliaceae, native to southern Europe but widespread in grainfields in Europe and North America. It has been used locally as a salad green and as an herb with a nutty tangy flavour.
Italian corn salad, Valerianella eriocarpa, thrives in warmer areas. Both plants are hardier than regular lettuce.