4 6 



retains hair with great pertinacity, and ought, in 

 all cases, to be examined in order to determine 

 whether the grass belongs to this group or not. If the 

 hair is so short that it escapes the eye, and merely 

 causes roughness, the grass will be more conveniently 

 found in some other group. In Phragmites Molinia^ 

 and Triodia the ligule is reduced to a tuft of hair, 

 and these genera are included here for convenience. 



Group XL Eared Grasses. Page 65. 

 Ears are tooth-like appendages at the base of the 

 blade merely diminutive representatives of the large 

 ear-like processes which occur at the base of arrow- 

 shaped blades, such as sorrel. Examples of grasses 

 easily distinguished by the ears are : 



Eared. 

 Couch grass 

 (Triticum). 



Barley 



(Hordeum). 



Sand lyme grass 



(Elymus). 



Rye grass 



(Lolium). 



Not Eared. 



Bent grass 



(Agrostis). 



Brome grass 



(except Bromus asper). 



Sand mat grass 



(Psamma). 



Crested dogstail 



(Cynosurus). 



Group XI L Ribless Grasses with Median 



Lines, Page 68. 



xii. 4, 5. Simple inspection of the upper surface of the leaf 

 blade usually suffices to identify the members of this 

 group. It is often advantageous to roll the blade 

 round the finger before examining the surface. In 



