Other forms: ryes
Rye is a grain that's commonly used to make things like bread and beer. So much rye is grown in Eastern Europe that it's known as the "rye belt."
The earliest rye appeared as invasive weeds that grew in fields of wheat. Once people began harvesting and making food with it, they realized what a hearty and versatile grain it was. Because rye grows in poor soils and thrives even with limited amounts of sunlight, it was once commonly referred to as a "poverty grain." Today you can find rye all over the supermarket, in bread, flour, crackers, and whiskey.