

PLATE IX. 
Fig, 136.—-Oart, 
Fie. 137.—DIAGRAM OF A SPIKELET oF OAT. 
g, pales ; 7, lodicules ; a, anther ; 0, ovary. 
Fic. 138.—“ GRAIN”? ENCLOSED IN GLUME: 
Fie. 189.—DIAGRAM OF INFLORESCENCE, 
‘Al 
