Cereals remained the most important staple during the early Middle Ages as rice was introduced late, and the potato was only introduced in 1536, with a much later date for widespread consumption. Barley, oats and rye were eaten by the poor. Wheat was for the governing classes. These were consumed as bread, porridge, gruel and pasta by all of society's members. Fava beans and vegetables were important supplements to the cereal-based diet of the lower orders. ("Phaseolus" beans, today the "common bean", were of New World origin and were introduced after the Columbian exchange in the 16th century.)