Romaine lettuce, also known as cos lettuce, is a leafy green vegetable with long, upright, crisp leaves that grow in loose heads. The leaves have a distinctive midrib that runs almost to the tip, and the outer leaves are coarse and dark green, while the inner leaves are more delicate and light green. Romaine lettuce has a subtly sweet and earthy flavor with a hint of bitterness, and a crisp and juicy texture. It's often used in Caesar salads and other dishes, and can be eaten raw or cooked. edis.ifas.ufl.edu HS658/MV125: Romaine—Lactuca sativa L. - University of Florida Description. Romaine has long, upright, crisp leaves with a distinctive midrib almost to the tip. The tip of the leaf is blunt. Leaves are somewhat folded (cupped) and grouped into loose heads. The interior leaves are more delicate and blanched than those toward the outside. ScienceDirect.com Romaine Lettuce - an overview | ScienceDirect Topics Cos (Romaine) lettuce has elongated heads of long leaves with heavy midribs. The outer leaves are coarse and tough in appearance and dark green, but the inner leaves are fine-textured and light green. The eating quality of cos lettuce is good and it is very popular in southern Europe and the Mediterranean region. LettuceInfo.org Romaine Lettuce Nutrition Facts & Calories| LettuceInfo.org Taylor Farms Romaine Lettuce - Vegetable Facts | Taylor Farms duplinschools.net Romaine Lettuce - Duplin County Schools “Romaine” is the American term for this long-leafed lettuce, also called “cos” lettuce because it is said to have originated on the Greek island of Cos (Kos) off the coast of Turkey in the Aegean Sea. This area is also the birthplace of the original physician Hippocrates. Generative AI is experimental.