EVERYDAY SCIENCE

Detailed explanation-1: -lettuce, (Lactuca sativa), annual leaf vegetable of the aster family (Asteraceae). Most lettuce varieties are eaten fresh and are commonly served as the base of green salads.

Detailed explanation-2: -Lettuce is a cool-season plant typically grown in the spring or fall in home gardens. Lettuce varieties are placed in one of four categories: butterhead, crisphead, loose-leaf and Romaine.

Detailed explanation-3: -There are four main types of lettuce: romaine (or cos), which forms tall and loose oblong heads; crisphead, which grows in tight heads that resemble cabbage; butterhead, which grows in soft, thick-leaved heads; and looseleaf, or leaf lettuce, which grows in a loose rosette of tender leaves off the stem.

Detailed explanation-4: -Although romaine and iceberg are the most common types, many varieties exist-each with their own unique flavors and nutritional properties. Here are 5 interesting types of lettuce.