SISYMBRIUM, in botany, a genus of the tetrandria filiquosa class. The pod opens with straight valves; and the calix and corolla are open. The species are 25, seven of them natives of Britain. The young leaves of the cordamine, or ladies-smoke, and of the nocturium, or water-creepers, are recommended in the scurvy, and eaten in large quantities for that intention with great success.