YOUNG CEREALS 52$ 



RECOGNITION OF YOUNG CEREALS BY THEIR LEAVES. 



(Examine with a good lens.) 



A. Young leaf-sheaths without hairs. 



(i) Barley. Base of leaf-blade with two large clasping claw-like 

 projections as in Fig. 189. 

 The leaf-blades are very broad with eighteen to twenty-four veins, 

 and rolled to the right. 



(2) Oat. Base of leaf-blade without projections as in Fig. 190. 



The leaf-blades are not so broad as those of barley and are a darker 

 green colour ; they are generally rolled to the left and have eleven 

 to thirteen veins. 



B. Young leaf-sheaths hairy. 



(3) Wheat. Young leaf-sheath densely covered with short hairs. The 



leaf-blades have claw-like projections intermediate in size between 

 those of barley and rye ; they are rolled to the tight and have 

 eleven to thirteen veins. 

 Close to the claw-like projections at the base of the blade are a few 

 long bristly hairs. 



(4) Rye. Young leaf-sheaths covered with short hairs among which 



are a number of sparsely-scattered long ones easily perceived with 

 the naked eye. 

 The first leaf-sheath which comes above ground is a purplish-red 

 colour ; the blade is rolled to the right and has eleven to thirteen 

 veins. The claw-like projections are smaller than those of wheat 

 and the accompanying bristly hairs are shorter and fewer in 

 number. 



