Cos lettuce, Romaine lettuce
Lactuca sativa var. longifolia
Family: Asteraceae
What it is like
A herb. The plant can be 25 cm high. The heads are elongated. The outer leaves are smooth and green. The leaves are more crisp.
There are about 20 Lactuca species.
Where it is found
It is a temperate plant.
Countries/locations it is found in
Asia, Australia, China, India
How it is used for food
It is a commercially cultivated vegetable.
Edible parts
Leaves, vegetable
How it is grown
Its other names
Local names
Synonyms
Lactuca sativa var. romana L. H. Bailey; [or L. sativa Cos or Romaine Lettuce Group]