This is a lettuce with more green than white leaves. It is oblong shaped and it also can be cooked. It adds a very good flavor in things you would use iceburg lettuce for.
They are many varieties of lettuce. Iceburg is generally the least nutritious.
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Yes. Click on the link below, under 'Related links' for lettuce recipe.
Yes, they can. Wild animals actually can have more types of natural food because they are more adapted to different forms of food.