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 Lovely Leaves: A Guide to Salad Greens
  
  … Lovely Leaves A Guide to Salad Greens Romaine Lettuce Known for its elongated, somewhat stiff leaves, this Caesar salad … ½ cups of butter lettuce contains 15% of your daily needs for both vitamin A and folate and 70% of your vitamin K … with a neutral, watery flavor and is therefore popular for wedge salads. Like most greens, it's low in calories. …