102 BULLETIN 772, U. S. DEPARTMENT OF AGRICULTURE. 
g ZZ 
eZ a aoe 
LALLA LLL 
LS 
Fic. 51.—Hordeum nodosum. Plant, < 3; group of three spikelets with rachis joint 
attached and a floret, the latter showing the rudiment back of the palea, X 3. 
