5a. Blade margins smooth 



204. Triticum aestivum — Wheat 



Leaves rolled in bud-shoot; sheath round, smooth, split with overlap- 

 ping hyaline margins; auricles small, mostly long hairy; collar broad; 

 ligule membranous, 1 to 1.6 mm. long, rounded, lacerate, may be ciliate; 

 blade 7 to 1 1 mm. wide, smooth near base and rough near tip above, 

 smooth below and keeled near base, margins smooth and hyaline. In- 

 florescence — a crowded, thick spike. Cultivated winter annual. 



5b. Blade margins rough 



205. Festuca arundinacea — Tall Fescue 



Leaves rolled in bud-shoot; sheath round, smooth or occasionally 

 rough, split with overlapping hyaline margins; auricles small, short 

 hairy; collar broad, divided, mostly hairy on margins; ligule membra- 

 nous, to 1.2 mm. long but mostly .4 mm. or less, truncate; blade mostly 

 5 to 10 mm. wide (rarely to 15 mm.) , smooth to rough above, glossy be- 

 low and smooth at least near base with a prominent midrib, margins 

 rough and hyaline. Inflorescence — an erect or nodding, somewhat con- 

 tracted panicle. More common in southern half of region. Meadows and 

 damp waste places. 



6a. Auricles large and long 



206. Hordeum vulgare — Barley 



Leaves rolled in bud-shoot; sheath round, smooth or hairy, split with 

 overlapping hyaline margins; auricles large and long; collar broad, di- 

 vided; ligule membranous, 1.5 to 3 mm. long, rounded; blade 8 to 13 

 mm. wide, rough above at least near tip, keeled and smooth below at least 

 near base, margins smooth and hyaline. Inflorescence — a dense, erect, 

 thick spike. Cultivated winter annual. 



6b. Auricles small and slender 7 



7a. Blade midrib white above, growing in large bunches 



207. Miscanthus sinensis — Eulalia 



Leaves rolled in bud-shoot ; sheath round, smooth, split with overlap- 

 ping hyaline margins; auricles short and blunt; collar broad, divided, 

 hairy on margins; ligule membranous, 2.5 to 3 mm. long, rounded, cili- 

 ate; blade 8 to 18 mm. wide, smooth near base and rough near tip above 

 and mostly with a few long hairs near base, smooth below with a promi- 

 nent midrib (rarely sparse hairy), margins very rough and hyaline. 

 Inflorescence — a fan-shaped, silky panicle. Cultivated for ornament, 

 growing wild in some localities. 



7b. Blade midrib not white above 8 



8a. Blade glossy below 9 



60 



