Bittercress is a common name used for several different types of plants in the mustard family. Some of the synonyms for bittercress include Cardamine, Cuckoo Flower, Lady's Smock, and Milkmaid. Cardamine is derived from the Greek word "kardamon" meaning "cress for the heart." Cuckoo Flower got its name because it blooms around the time when the cuckoo bird starts to sing. Lady's Smock is named after the medieval belief that the flower represented the Virgin Mary's smock. Milkmaid refers to the plant's white flowers that resemble the white apron worn by dairy maids. No matter what you call it, bittercress is a tasty and nutritious addition to salads and sandwiches.