KEY TO COMMON GRASSES. 49 



Base of sheaths white or Ught grey ; thin papery 

 leaf ; medial groove frequently absent ; almost 

 ribless ; examination of numerous leaves usually 

 discloses short hairs in lines on upper side of leaf 



Tall Oat Grass 



The common cereals may be identified by the following 

 simple key : — 



1. With ears 2 

 Without ears Oats 



2. With moderate-sized ears, bearing scattered long 



silky hairs Wheat 



Large ears bearing no hairs Barley 



