Gluten is also found in other grains besides wheat. These are rye, barley and triticale – which is a newer grain that is a cross between wheat and rye. According to the Celiac Disease Foundation ...

It grows rapidly and vigorously from seed. Rye tends to be taller thank wheat. This plant is a bunch type grass with many upright tillers. The leaves, like most small grains are rolled in the whorl.