- leaf lettuce, Lactuca sativa crispa - distinguished by leaves having curled or incised leaves forming a loose rosette that does not develop into a compact head
--1 is a kind of lettuce
--1 has parts: leaf lettuce, loose-leaf lettuce - leaf lettuce, loose-leaf lettuce - lettuce with loosely curled leaves that do not form a compact head
--2 is a kind of lettuce
--2 is a part of leaf lettuce, Lactuca sativa crispa