Glossary
Romaine (Cos) lettuce
Short definition: Romaine lettuces form tall heads with firm, upright leaves. Also known as Cos lettuces.
Botanical classification: Lactuca sativa var. longifolia
Typical varieties: Lobjoits Green Cos, Little Gem, Valmaine
Key features: Very crispy leaves. More heat-tolerant than other types of lettuce.
