Romaine or cos lettuce is a variety of lettuce (Lactuca sativa L. var. longifolia) that grows in a tall head of sturdy leaves with firm ribs down their centers. Unlike most lettuces, it is tolerant of heat.
Origin and etymologyEdit
In British English, it is commonly known as "cos lettuce", and in North America as "romaine" lettuce. Many dictionaries trace the word cos to the name of the Greek island of Cos, from which the lettuce was presumably introduced. Other authorities trace cos to the Arabic word for lettuce, khus خس [xus].
It apparently reached the West via Rome, as in Italian it is called lattuga romana and in French laitue romaine, both meaning 'Roman lettuce', hence the name 'romaine', the common term in North American English.
In North American supermarkets, romaine is very widely available year-round.
The thick ribs, especially on the older outer leaves, should have a milky fluid which gives the romaine the typically fine-bitter herb taste.
|Nutritional value per 100 g (3.5 oz)|
|Energy||72 kJ (17 kcal)|
|Dietary fibre||2.1 g|
|Vitamin A equiv.||
|Percentages are roughly approximated using US recommendations for adults.
Source: USDA Nutrient Database
Food safety issuesEdit
From November 2017 through January 2018, romaine was identified as being linked to illness in at least 17 people in 13 states of the U.S. and 41 people in Canada with 1 death. Public Health Agency of Canada issued a statement on December 28, 2017. Consumer Reports advised Americans not to consume romaine lettuce on January 4, 2018.
- Walker, Norman Wardhaugh (1970). "Cos or Romaine Lettuce Juice". Fresh Vegetable and Fruit Juices: What's Missing in Your Body?. Book Publishing Company. Retrieved 2 December 2013.
- Oxford English Dictionary, First Edition, 1893, s.v. 'cos'
- Davidson, Alan (1999). The Oxford Companion to Food. Oxford University Press. ISBN 0-19-211579-0.
Cos lettuces are probably not named for the island of Kos but for the Arabic word for lettuce
- Bittman, Mark (2 April 2010). "The Charms of the Loser Lettuces". New York Times. Retrieved 27 January 2018.
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- "AICR's Foods That Fight Cancer: Dark Green Leafy Vegetables". American Institute for Cancer Research.
- Fox, Maggie. "Stay away from romaine lettuce, Consumer Reports advises". NBC News. Retrieved 27 January 2018.
- Public Health Agency of Canada. "Public Health Notice – Outbreak of E. coli infections linked to romaine lettuce". Retrieved 27 January 2018.
- "Consumer Reports warns against eating any romaine lettuce". Food Safety News. 4 January 2018. Retrieved 27 January 2018.
- Tooke, William (1855). The Monarchy of France: its rise, progress, and fall. London: Sampson Low & Son. p. 634.
- The dictionary definition of romaine at Wiktionary