2b. Blade to 20 mm. or more wide 



242. Hystrix patula — Bottlcbrush 



Leaves rolled in bud-shoot; sheath round, rough and long hairy, split 

 with overlapping margins hyaline or one hairy; auricles absent; collar 

 narrow to broad; ligule .2 to .6 mm. long, truncate; blade to 25 mm. 

 wide, smooth above, smooth below at least near base, margins rough and 

 hyaline. Inflorescence — a loosely flowered, bristly, erect or nodding 

 spike. Throughout. Infrequent in moist places. 



3a. Blade very rough above and below and on margins 



243. Leersia oryzoides — Rice Cut-grass 



Leaves rolled in bud-shoot; sheath round, very rough, split with over- 

 lapping margins hyaline or one hairy; auricles absent; collar broad, may 

 be divided, sometimes short hairy; ligule membranous, .8 to 1.5 mm. 

 long, truncate; blade to 14 mm. wide, very rough above and below and 

 on margins. Inflorescence — a spreading flexuous-branched panicle. 

 Throughout. Marshes, riverbanks and wet places. 



3b. Blade not very rough 4 



ml'' 



W7 

 i 1 



4a. Sheath and blade dense velvety hairy 



244. Holcus lanatus — Velvet Grass 



Leaves rolled in bud-shoot; sheath loose, round, dense velvety hairy, 

 split with overlapping margins; auricles absent; collar narrow to medium 

 broad, usually divided, hairy; ligule membranous, 1.5 to 2 mm. long, 

 rounded; blade to 12 mm. dense velvety short hairy above and below, 

 keeled below, margins short hairy. Inflorescence — a long, contracted, 

 pale, purple-tinged panicle. Throughout. Open ground, meadows and 

 moist places. 



4b. Sheath and blade not dense velvety hairy 5 



5a. Blade blue-green (glaucous) above and below 



245. Paspalum floridanum var. glabratum — Smooth Florida Paspalum 



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

 with overlapping margins at times hairy; auricles absent; collar narrow 

 to broad, sometimes hairy on margins; ligule membranous, 1 to 2 mm. 

 long, rounded, may be ciliate ; blade to 25 mm. wide, glaucous above and 

 below, long hairy near base above, smooth below with midrib prominent, 

 margins rough and hyaline. Inflorescence — 2 to 5 one-sided, spike-like 

 branches with flat, round to oval seed. New Jersey south. Brackish 

 marshes and low sandy ground. 



5b. Blade not blue-green 6 



6a. Growing in large bunches, blades to 40 inches long 



• 69 



