GROUP 1 



2 

 la. Blade hairy above 



1 b. Blade not hairy above 



2a. Blade about 1 mm. wide 



1. Aristida dichotoma— Poverty Grass 



Leaves folded in bud-shoot; sheath distinctly flattened and keeled, 

 smooth or sometimes sparsely long hairy, split; auricles absent; collar 

 narrow, divided; ligule a minute fringe of hairs; blade about 1 mm. 

 wide, rough and sparsely long hairy above, smooth below, margins 

 rough. Inflorescence— few-flowered, narrow, terminal and axillary pani- 

 cles. Common throughout. Dry open ground. 



2b. Blade more than 1 mm. wide 



3a. Collar hairy at least on margins 



3b. Collar not hairy 



2. Festuca octoflora — Six-weeks Fescue 



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

 sometimes rough or short hairy, split with overlapping margins; auricles 

 absent; collar narrow; ligule membranous, .2 to .3 mm. long, truncate, 

 sometimes lacerate or ciliate; blade to 2 mm. wide, short hairy above 

 and below and on margins. Inflorescence— a narrow panicle with short 

 branches. New York south. Open sterile ground. 



4a. Ligule about .2 mm. long 



3. Sporobolus clandestine— Scratch Dropseed 



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

 hairy or hairy at throat, split with overlapping margins; auricles absent; 

 collar broad with a narrow band of hairs; ligule a fringe of hairs about 

 .2 mm. long; blade about 3 mm. wide, long hairy above and below, mar- 

 gins rough. Inflorescence— a narrow contracted panicle. Connecticut 

 south. Sandy fields. 



4b. Ligule 2 to 3 mm. long 



4. Cynodon dactylon— Bermuda Grass 



Leaves rolled in bud-shoot; sheath loose, distinctly flattened, sparsely 

 short hairy with a tuft of hairs at throat, split with overlapping margins; 

 auricles absent; collar narrow, hairy on margins; ligule a fringe of hairs, 

 2 to 3 mm. lone; blade 2 to 3 mm. wide, sparsely short hairy above, 

 smooth below, margins rough. Inflorescence-^ or 5 digitate spikes. 

 Maryland south. Common in fields and grasslands. 



