lib. Blade 8 to 1 5 mm. wide 



113. Panicum capillare — Witchgrass 



Leaves rolled in bud-shoot; sheath round, long hairy, split with over- 

 lapping hyaline margins; auricles absent; collar broad, hairy; ligule a 

 fringe of hairs, 1 to 2 mm. long, fused at base; blade 8 to 15 mm. wide, 

 hairy above and below, margins rough and long hairy at least near base. 

 Inflorescence — a very diffuse, densely flowered panicle, about half en- 

 tire height of plant. Throughout. Cultivated fields, open ground and 

 waste places. 



1 2a. Sheath hairy at least at top or throat 13 



1 2b. Sheath not hairy 16 



1 3a. Blade not more than 5 mm. wide 



114. Danthonia spicata — Poverty Oatgrass 



Leaves folded in bud-shoot; sheath round to somewhat flattened, 

 smooth with a tuft of hairs at throat, split with overlapping hyaline mar- 

 gins; auricles absent; collar broad, divided; ligule a fringe of hairs, 4 to 6 

 mm. long; blade 3 to 5 mm. wide, rough above, smooth near base and 

 rough near tip below, margins rough. Inflorescence — a narrow panicle 

 with stiff, short branches bearing one spikelet. Throughout. Sandy and 

 sterile or rocky soil. 



13b. Blade more than 5 mm. wide 14 



14a. Blade hairy above at least near base 15 



1 4b. Blade not hairy above 



115. Uniola paniculata — Sea Oats 



Leaves rolled in bud-shoot; sheath round, smooth with a tuft of hairs 

 at throat, split with overlapping hyaline margins; auricles absent; collar 

 broad, indistinct; ligule a fringe of hairs, 2.5 to 3 mm. long; blade 7 to 10 

 mm. wide, smooth to rough above, smooth below, margins smooth and 

 hyaline. Inflorescence — a pale, condensed, heavy, nodding panicle. East- 

 ern shore of Virginia south. Sand dunes of sea coast. 



1 5a. Ligule to 3 mm. long 



1 16. Paspalum pubescens — Hairy Paspalum 



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

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

 narrow, hairy; ligule a fringe of hairs, 2 to 3 mm. long; blade 8 to 12 mm. 

 wide, long hairy above and below, margins long hairy and hyaline. 

 Inflorescence — 1 to 3 one-sided, spike-like branches with flat, round to 

 oval seed. Vermont south. Common in old fields and pastures. 



36 



