Varieties of purple lettuce include "devil's tongue," "granada," "mascara," "Merlot," "purplus," "red fire," "red leprechaun" and "ruby." There are also lettuces featuring purple accents, such as "cracoviensis" or "speckled," or leaves with a subtle purple tinge like "cimmaron" or "red oak leaf."
Seeds for growing heirloom varieties of purple lettuce are increasingly available to gardeners. Purple lettuce also appears among the produce available from farmer's markets and organic grocery stores, most commonly in the form of purple-red romaine varieties.
There are also some salad greens that are purple, even though they are not technically lettuce. Both radicchio and red cabbage have reddish-purple leaves that make colorful additions to a salad.