Emmer and spelt
Emmer is a low yielding, tall form of wheat with no husk that originated by natural hybridisation of wild species in the Near East and is known from about 7000 BC. It became the staple cereal all over Europe and the Near East in prehistoric times. Spelt is similar to emmer, but has a tough husk that is hard to remove. Both spelt and emmer were widely grown in Iron Age Britain.