11a. Auricles present 



145. Lolium perenne — Perennial Ryegrass 



Leaves folded in bud-shoot; sheath distinctly flattened, smooth, split 

 with overlapping hyaline margins ; auricles small ; collar narrow to broad, 

 divided; ligule membranous, to .8 or 1 mm. long, truncate to rounded; 

 blade to 4 mm. wide, smooth above, smooth and glossy below, margins 

 smooth to rough and hyaline. Inflorescence- — long, narrow, flat spikes 

 with unawned spikelets placed edge to rachis. Cultivated throughout. 



lib. Auricles absent 12 



1 2a. Sheath hairy at least at top 13 



12b. Sheath not hairy 



146. Andropogon virginicus — Broomsedge 



Leaves folded in bud-shoot; sheath distinctly flattened, smooth, split 

 with margins hairy; auricles absent; collar narrow, divided, mostly hairy 

 on margins; ligule membranous, .4 to .8 mm. long, truncate to rounded, 

 ciliate; blade 3 to 7 mm. wide, hairy near base above, smooth to rough 

 below, margins rough and long hairy. Inflorescence — a narrow panicle 

 with feathery branches. New York south. Mostly old fields. 



13a. Ligule about .4 mm. long 



147. Andropogon ternarius — Silver Beardgrass 



Leaves folded in bud-shoot ; sheath distinctly flattened, long hairy, split 

 with overlapping margins hairy; auricles absent; collar narrow, divided, 

 hairy on margins; ligule membranous, about .4 mm. long, truncate, cili- 

 ate; blade 4 to 7 mm. wide, long hairy near base above, rough and keeled 

 below, margins sparsely long hairy and hyaline. Inflorescence — a narrow 

 panicle with silver to creamy or grayish feathery branches. Delaware 

 south. Dry sandy soil. 



13b. Ligule .6 to 1 mm. long 



148. Eleusine indica — Goosegrass 



Leaves folded in bud-shoot; sheath distinctly flattened, hairy at top, 

 split with overlapping margins sometimes hairy; auricles absent; collar 

 broad, hairy on margins; ligule membranous, .6 to 1 mm. long, truncate, 

 sometimes short ciliate; blade 5 to 10 mm. wide, sparsely long hairy near 

 base above, smooth and keeled below, margins smooth to rough or some- 

 times long hairy. Inflorescence — 2 to 10 flat spikes at or near summit. 

 Massachusetts south, common. Cultivated fields, open ground and 

 waste places. 



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