Grains are commonly called cereals. There are two types of grains: true cereals and pseudocereals. True cereals are mostly grasses, and pseudocereals are non-grasses but used in much the same way as cereals. 

Examples of True Cereals: 

• Wheat
• Corn
• Rice
• Barley
• Sorghum
• Millet
• Rye
• Oats
• Teff
• Spelt

Examples of Pseudocereals:

• Amaranth
• Quinoa / Kaniwa
• Buckweat