Orychophragmus violaceus

Orychophragmus violaceus, the Chinese violet cress, is a species of flowering plant in the family Brassicaceae. It is native to northern and southeastern China and North Korea, and it has been introduced to Japan and the U.S. state of Virginia. An annual or biennial herb typically 60 cm (24 in) tall, it is found in a wide variety of habitats, including anthropogenically disturbed ones. Hardy in USDA zones 7 through 10, in China it is cultivated as a vegetable for its stalks. The Royal Horticultural Society considers it "potentially harmful".