3b. Ligule not more than 1.2 mm. long 



234. Agrostis tenuis — Colonial Bent 



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

 ping hyaline margins; auricles absent; collar narrow, may be divided; 

 ligule membranous, to 1.2 mm. long, truncate; blade to 4 mm. wide, 

 rough above, smooth below, margins rough. Inflorescence — an open, 

 delicate panicle. Common throughout. Pastures, lawns and waste 

 places. 



4a. Plants found only on coastal sand dunes 



235. Ammophila breviligulata — American Beachgrass 



Leaves rolled in bud-shoot; sheath round, smooth to slightly rough, 

 split with overlapping hyaline margins; auricles absent; collar broad, 

 may be divided; ligule membranous, 1 to 3 mm. long, rounded, may be 

 short ciliate; blade 5 to 10 mm. wide, generally stiff, rough above, smooth 

 and glossy below, margins smooth and hyaline and generally rolled in- 

 ward. Inflorescence— pale, dense, nearly cylindrical, spike-like. Maine 

 south. Sand dunes along coast. 



4b. Plants not found on coastal sand dunes 5 



5a. Plants with creeping rhizomes 



236. Agrostis alba — Redtop 



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

 ping hyaline margins; auricles absent; collar narrow to broad, divided; 

 ligule membranous, to 3 mm. long, rounded, may be toothed ; blade 4 to 

 10 mm. wide, mostly rough above and below, margins rough and hya- 

 line. Inflorescence — a reddish, spreading panicle. Common throughout. 

 Meadows, pastures, lawns and waste places. 



5b. Plants without creeping rhizomes 6 



6a. Ligule notched near front on one or both sides 



237. Phleum pratense — Timothy 



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

 ping hyaline margins; auricles absent; collar mostly broad and divided; 

 ligule membranous, to 2 mm. long, rounded, notched near front on one 

 or both sides; blade 5 to 10 mm. wide, smooth above and below at least 

 near base, margins rough and hyaline. Inflorescence — densely flowered, 

 cylindrical, spike-like. Common throughout. Fields and waste places. 



6b. Ligule not notched as above 7 



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