Popular variety of lettuce with elongated, pale-green leaves characterized by their crisp texture and slightly pungent flavor.

This lettuce has long, narrow leaves, crunchy ribs and a slight tang. Also called Cos lettuce because of its origin on the Aegean island of Cos.

Gaining in popularity as a replacement for iceberg, romaine lettuce has dark green leaves and a crunchy texture.

Also called "cos," this variety of lettuce is long and cylindrical. Its broad, crisp leaves are used in Caesar salads.

Romaine or Cos lettuce (often called simply Romaine or Cos) (Lactuca sativa L. var. longifolia) is a variety of lettuce which grows in a long head of sturdy leaves with a firm rib down the center. Unlike most lettuces, it is tolerant of heat.