What is the X in X-mas?
((Crambe maritima), cabbagelike perennial plant in a genus of about 20 species in the mustard family (Brassicaceae), native to seashores and cliffs of Eurasia. Young or blanched leaves are cooked and eaten. The waxy, blue-green, coarsely toothed leaves are 30-90 cm (1-3 feet) long. Honey-fragrant, clustered sprays of white, four-petaled flowers rise from the basal leaves.