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leaf vegetables 
Leaves of edible plants consumed as vegetables.
leaf lettuce
Lettuce having soft wavy leaves with curly edges; like most types of lettuce, it is usually eaten raw, in salads or sandwiches.
celtuce
The result of crossing lettuce and celery, it is mainly known in the Orient; the stems are eaten raw or cooked.
sea kale
Widely used in Europe, its leaves and wide fleshy stems are prepared like asparagus.
collards
It has thick, strongly flavored leaves and tough central ribs; it is eaten like spinach, either raw or cooked.
romaine lettuce
Lettuce with firm crisp leaves used especially to make Caesar salad.
