Types of salad leaves

Some of the most nutritious greens include spinach, kale, romaine, watercress, and arugula (see “Salad greens by the numbers”). They are rich in a combination of vitamins A, C, and K; several B vitamins (including folate); and potassium.

Radicchio. Radicchio grows as tight heads of red or deep purple leaves streaked with prominent white ribs. It’s quite bitter in flavor.

Lettuce is a cool-season plant typically grown in the spring or fall in home gardens. Lettuce is placed in one of four categories: crisphead, butterhead, romaine and loose-leaf. Known for its crisp texture and tight, cabbage-like head, this variety features a mild flavor and pale green leaves.