scurvy grass

(noun) a widely distributed Arctic cress reputed to have value in treatment or prevention of scurvy; a concentrated source of vitamin C. Synonyms: common scurvy grass, Cochlearia officinalis.

(noun) any plant of the genus Barbarea: yellow-flowered Eurasian cresses; widely cultivated for winter salad. Synonyms: winter cress, St. Barbara's herb.