acephala group africa biennial plant brassica oleracea brazil broccoli bronchitis cabbage caldo verde carbohydrate cornbread cuisine of brazil cultivar fat fatback feijoada flavor frost garlic gout greek language ham hock kale kashmir montenegro mustard plant onion perennial plant pork and beans portugal portuguese cuisine reference daily intake soul food soup spain spanish language species spinach spring greens staple sulforaphane turnip united states vitamin a vitamin c vitamin k