Any of several edible seaweeds of the genus Ulva. / Similar seaweed species of other genera: / Monostroma spp., also known as the slender sea lettuce, a kind of algae.

corn salad or mâche, Valerianella locusta, a small plant of the family Caprifoliaceae whose leaves are used in salads.

Common sow thistle (Sonchus oleraceus).

Romaine lettuce

plural of Romaine lettuce

plural of cos lettuce

A long-leafed variety of lettuce, Lactuca sativa var. longifolia.

A plant used in salads, lamb's lettuce or mâche, Valerianella locusta

A plant of the species Dudleya caespitosa, succulent perennials native to California.

A variety of head lettuce with loose arrangement of leaves, known for its sweet flavor and tender texture.