The  hull protects the endosperm, germ and bran portion of the grain  seed. Cereal grains which have such beards or awns are wheat,  barley, rye and triticale. Rice, corn, and oats do not have such  awns due to the different characteristics of their inflorescences  or flowering portion of the grass plant.1 person found this useful.ereal grains which have such beards or awns are wheat,  barley, rye and triticale. Rice, corn, and oats do not have such  awns due to the different characteristics of their inflorescences  or flowering portion of the grass plant. 1 person found this useful.