A. —Typical spikes of the varieties used as parents in the cross studie 
progeny. ( I) Kota, (2) Fi hybrid, and (3) Hard Federation 
B. —Spikes of F2 hybrids representing the 5 classes for expression of 
less, (2) apically-awnletted, (3) awnletted, (4) short-awned, and (t 
