

mm 



^m 





■^ .y. 



m 



mm 



4b. Blade not hairy above 



136. Uniola laxa — Slender Uniola 



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

 with overlapping hyaline margins; auricles absent; collar narrow; ligule 

 membranous, .2 to .4 mm. long, truncate; blade to 8 mm. wide, rough 

 above, smooth below and keeled, margins rough. Inflorescence — a slen- 

 der, nodding panicle. Coastal Plain, Long Island south. Moist, shady 

 places. 



5a. Plants with creeping rhizomes, blades to 4 in. long 



137. Muhlenbergia frondosa — Wirestem Muhly 



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

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

 hairy on margins; ligule membranous, about 1 mm. long; blade 3 to 8 

 mm. wide, rough above, rough below at least near tip, margins rough. 

 Inflorescence— numerous, slender panicles. Throughout. Not common. 

 Low ground and waste places. 



5b. Plants without creeping rhizomes, blades not over 2 '/a in. long 



138. Muhlenbergia schreberi — Nimble will 



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

 with overlapping hyaline margins; auricles absent; collar medium broad 

 to broad, hairy on margins; ligule membranous, .4 to .8 mm. long, trun- 

 cate to rounded ; blade to 7 mm. wide, rough above, rough below at least 

 near tip, margins rough and hyaline. Inflorescence — numerous, slender 

 panicles. New Hampshire south. Lawns, pastures and waste places. 



6a. Collar hairy at least on margins 7 



6b. Collar not hairy 



139. Hordeum jubatum — Squirrel-tail Barley 



Leaves rolled in bud-shoot; sheath distinctly flattened, short hairy, 

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

 divided; ligule membranous, about .6 mm. long, truncate; blade 3 to 5 

 mm. wide, rough above and below and on margins. Inflorescence — a 

 dense, very bushy, nodding spike. South to Maryland. Meadows and 

 waste places. 



7a. Ligule .2 to .4 mm. long 



140. Panicum anceps — Flat-stemmed Panicgrass 



Leaves rolled in bud-shoot; sheath distinctly flattened, long hairy at 

 least near top, split with overlapping margins mostly hyaline but some- 

 times one hairy; auricles absent; collar narrow to broad, hairy; ligule 

 membranous, .2 to .4 mm. long, truncate, may be ciliate; blade 10 to 

 18 mm. wide, short hairy above at least on lower half, smooth below with 

 midrib prominent, margins rough and hyaline. Inflorescence — a very 

 loose, open panicle. New Jersey south. Moist sandy soil. 



42 



