4b. 



Blade not glossy and shining below 5 



5a. Plants growing on low, wet soil 



164. Andropogon glomcratus — Bushy Bcardgrass 



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

 hairy at least along margins, split with overlapping margins hyaline or 

 sometimes hairy; auricles absent; collar narrow to medium broad, di- 

 vided, may be hairy; ligule membranous, 1 to 2 mm. long, rounded, 

 mostly ciliate, may be toothed; blade 5 to 9 mm. wide, rough above and 

 may be sparsely long hairy near base, smooth to rough and keeled below, 

 margins rough and sometimes sparsely long hairy. Inflorescence— a. 

 dense, brush-like, feathery panicle. Massachusetts south. Low wet soil. 



5b. Plants not usually found on low, wet soil 



6a. Sheath long hairy, at least along margins 



165. Andropogon virginicus — Broomsedge 



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

 hairy at least along margins, split with overlapping margins that may be 

 sparsely long hairy; auricles absent; collar narrow, divided, may be hairy 

 on margins; ligule membranous, 1 to 2 mm. long, rounded, may be cili- 

 ate; blade 4 to 6 mm. wide, smooth to rough above and sometimes long 

 hairy near base, smooth and keeled below, margins smooth or long hairy. 

 Inflorescence—* narrow panicle with feathery branches. New York 

 south. Mostly old fields. 



6b. Sheath not long hairy 



7a. Plant found only on dune sand along coast 



166. Andropogon littoralis — Seashore Beardgrass 



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

 with overlapping hyaline margins; auricles absent; collar narrow, 

 divided, may be reddish; ligule membranous, 1 to 2 mm. long, rounded, 

 may be ciliate; blade 4 to 6 mm. wide, smooth to rough above, keeled 

 and rough at least near tip below, margins rough and hyaline. Inflores- 

 cence—a narrow panicle with flexuous, feathery branches. Massachusetts 

 south. Dune sand along coast. 



7b. 



Plant not found on dune sand 8 



49 



