Lactuca sativa longifolia, commonly known as long leaf lettuce or cos lettuce, is a variety of lettuce widely cultivated for its edible leaves. It belongs to the Asteraceae family and is derived from the wild lettuce Lactuca serriola.
Long leaf lettuce typically grows in a rosette shape with elongated leaves that form a loose head. The leaves are deeply lobed and have a slightly bitter taste, which becomes more pronounced as the plant matures. The outer leaves are often more rigid and darker green in color, while the inner leaves are tender and lighter in color.
This lettuce variety is valued for its crisp texture and refreshing flavor, making it a popular choice in salads, sandwiches, and wraps. It is commonly harvested when young, as older leaves tend to become tougher and develop a stronger taste. Long leaf lettuce is known for its high nutritional content, as it is low in calories and packed with vitamins A, C, and K.
Cultivating Lactuca sativa longifolia requires well-drained soil and full sun exposure. It is a cool-season crop, thriving in temperatures between 45°F to 75°F (7°C to 24°C). This variety is relatively easy to grow and is often cultivated in home gardens, commercial farms, and greenhouse production.
In summary, Lactuca sativa longifolia refers to a type of lettuce with elongated and deeply lobed leaves, commonly grown for its crisp texture and slightly bitter flavor. It is highly nutritious and adaptable to various cultivation environments.
