Group II. Variegated Grasses. 



White strips narrow, only seen when the blade is held 

 up to the light (fig. 4). 

 Aira caespitosa, L. (Tufted hair grass). The snow-white 



strips are six (sometimes five) in number. 

 Fig. i. Base of blade and long acute ligule. 

 Fig. 2. Acute apex of blade. 



Fig. 3. Portion of blade magnified. Observe the very 

 high acute ribs, the summit of each with teeth 

 giving the excessive roughness to the blade. 

 Fig, 4. Portion of blade, magnified, as it appears by 

 transmitted light. Observe six snow-white 

 bands. 

 Fig. 5. Section of young blade, magnified. After Lund. 



White strips broad, and seen without holding the 

 blade up to the light. These are cultivated 

 for ornament. 

 Dactylis glomerata, var. picta (Variegated cocksfoot). 



Sheath flat (V. i). 



Phalaris arundinacea, var. picta (Ribbon grass). Sheath 

 round (VI. 17). 



Group III. Bulbous Grasses. 



Ribs very high (twice as high as broad) and very acute. 



Alopecurus bulbosus, L. (Bulbous foxtail). 

 Ribs very low and flat. Sheath not keeled (fig. 3). 

 Phleum pratense, L. (Timothy or catstail). Basal 

 margin of blade with teeth directed downwards, 

 therefore up^vards rotigh. Ligule not hairy on the 

 back. 



Fig. i. Apex of blade. 

 Fig, 2. Base of blade and ligule. 

 Fig. 3. Transverse section of round, keelless sheath 



(diagram). 



Fig. 4. Ligule, magnified, without hair. 

 Fig. 5. Section of blade with low ribs. After Stebler. 

 Phleum Boehmeri. Schrad. Ligule shorter than broad. 

 Very rare. 



