39 



Group X. Hairy Grasses. 



White sheathed and red veined (I., 4). 



Yorkshire Fog (Holcus lanatus} Blades very soft. 

 Fig. 3. Base of blade and ligule. 



Fig. 4. Section of the keeled sheath, the keel to the right. 

 Fig. 5. Hairy back of ligule. 

 Fig. 6. Hairless inner surface of ligule. 

 Fig. 7. Transverse section of blade (magnified). Ob- 

 serve the abundant hair on the low flat ribs, 

 and also on lower surface. After Stebler. 

 Blade taper-based ; ligule reduced to hairs. 



Flying Bent (Molinia ccerulea}. The thin blade soon 

 withers, and is carried off by the wind hence the 

 name " Flying bent." Blade very thin and dry. 

 Fig. 8. Tapered base of blade, and ligule of hairs. 

 Fig. 9. Acute apex of blade. 

 Blade bitter-tasted. 



Sweet Vernal (Anthoxanthum odoratum). 



Fig. 10. Base of blade with small round ears, and 



beard of hair. See also VII., I, 2, 3, 4, 5. 



Blade with low acute ribs ; a single row of hair along 



each rib (fig. 2) ; ligule hairy on the back. 

 Golden Oat Grass (Avenaflavescens}. Blade soft. 

 Fig. I. Base of blade and ligule. 



Fig. 2. Transverse section of blade (magnified). Ob- 

 serve the acute ribs and the hair. 

 Blade with low flat ribs ; ligule prominent. 



False Oat (fig. 15) is distinguished from golden oat by the 

 low flat ribs, and the bulbous base of the shoot. 

 Blades thin and dry. 

 Base of blade eared (fig. 12). 



Couch Grass ( Triticum repens}. Blades very thin, dry, and 



rough. 



Fig. ii. Base of blade, with ears very short. 

 Fig. 12. Base of blade, the ears long, curved, and acute. 

 Fig. 13. The ligule (magnified). A mere margin fringed 



with hair-like teeth. 

 Fig. 14. Transverse section of the blade magnified. 



After Lund. 



Note. The low ribs distinguish this from Ryegrass, and the 

 ears from Agrostis. 



Bristle-bladed. 



Sheep's Fescue. The sheath is often clothed with very 

 short, hard hair, and is, therefore, very rough. (The 

 same is the case with the upper surface of the blade.) 



Group XL (See Part IL) 



