BULLETIN 772, U. S. DEPARTMENT OF AGBICULTURE. 
100 
° 
’ 
A, a spike of beardless barley, X 2 
aes 
27 
Plant, X 2 
Fre. 50.—Barley, Hordeum vulgare. 
showing the rudiment back of the 
gs 
=> 
roup of three spikelets and a floret, the latter 
palea, X 3. 
