Most dictionaries trace the word cos to the name of the Greek island of Cos, from which the lettuce was presumably introduced. Other authorities (Davidson) trace it to the Arabic word for lettuce, خس khus (xus)
The thick ribs, especially on the older outer leaves, should have a milky fluid which gives the romaine the typically fine-bitter herb taste. Romaine is the standard lettuce used in Caesar salad.
The American Institute for Cancer Research includes Romaine Lettuce in its list of foods that fight Cancer.
DEPARTMENT OF CONSUMER PROTECTION ALERTS PUBLIC TO FRESHWAY FOODS' VOLUNTARY RECALL OF ROMAINE LETTUCE PRODUCTS DUE OF POSSIBLE HEALTH RISK.
May 06, 2010; HARTFORD, CT -- The following information was released by the Connecticut Department of Consumer Protection: Freshway Foods is...