<<Disclaimer: Verify this information before applying it to your situation.>> I remember finding this interesting when I was first starting my diet. ======================= TAXONOMIC RELATIONSHIP OF MAJOR CEREAL GRAINS FAMILY Gramineae / \ / \ / \ / \ / \ / \ SUBFAMILY Festucoideae Panicoideae / | \ | / | \ | / | \ | / | \ | / | \ | / | \ | / | \ | / | \ | TRIBE Triticeae Aveneae Oryzeae Tripsaceae / \ | | | / \ | | | / \ | | | SUBTRIBE Triticineae \ | | | / \ \ | | | GENUS Triticum Secale Hordeum Avena Oryza Zea | | | | | | SPECIES T.aestivum S.cereale H.vulgare A.sativa O.sativa Z.mays (WHEAT) (RYE) (BARLEY) (OAT) (RICE) (CORN)