FKSTCCK.K. MT} 



long, rays mostly in twos nnd thrcos, the longest two-thinl.'^ lu 

 long :i8 the panicle, branching aii<l i1owerlN>uring for two-thinls of 

 its Kingtii. Spikclets ovate, hcconiing broiuli-r, tiiniid, like those 

 of liriza, 6 mm. long, O-JMloweied, pale, sometimes tinginl with 

 purple, joint of rachilla about ().r> mm. long, and brittle: empty 

 glumes ovate, often acute, 1 -nerved, first l..'»-*2 nmi. long, second 

 *-J-:{ mm. long; floral glume oval, acute or bluiit-i>otnte«l, T-nerved. 

 .'{-.'{.*> mm. long; palea broadly ovsd, 'J-5 mm, long, ti-keeled. 

 y-toothed, tho keels bent backward. 



Vermont, IWinyJc ; ^lassachusetts, Heal IIU; liho<le Island, 

 Tirreiii/ for T". S. T)ept. Agricul. fi8(): Michigan, Uniiijlittin, F. K. 

 Wood, Fnrm'lh WIteckr; Minnesota, Arthur H 'HW. 



Wet places, Maine, Canada to Miuuesotu and bouth to Punu- 

 sylvania. 



'^. P. obtusa (Mubl.) Kuntze, Uev. Gen. PI. 7S:i (181»1). Pnn 

 ohtiisd Mulil. Cram. 147 (ISIT). Clyceria obtusii Trin. Mem. 

 Acad. St. Petersb. (VI.) 1:.%6 (1831). 



An erect stout perennial, 3()-*0 cm. high. Sheaths mostly 

 longer than tho internodes; ligule firm, less than 1 mm. long; 

 blades of the culm G-7, besides those of sterile shf>ots, scabrous above, 

 thick, flat or the margins involute. 15-30 cm. long, 4-7 mm. wide. 

 Panicle erect, rigid, narrowly ol)long, dense, S-1"J cm. long, rays 

 numerous, very short. S])ikelets 4-8 mm. long, ovate. 3-0-8- 

 flowered, joint of rachilla about 0.,5 mm. long; empty glumes 

 Jiearly equal when separated and measured, 2.2 mm. long, ovatt-, 

 1-iierved ; floral glume concave, coriaceous, 3.5 mm. long, oblong be- 

 fore spreading, indistinctly 7-nerved; palea firm, oval before 

 sj)n'uding, nearly as long as its ghune. (Jrain nearly 'J mm, long, 

 rougliened, compressed, oval, jjoiuted at the base. 



Massachusetts, 11'. /*. Conunf, Ti. J. CtmijiUn, Slurlennil : New 

 Jersey, Srribiier for V. S. Dept. Agricul. 090. Clark 1918, Co/ihi/, 

 Scribner 3406, Dr. J. li. llrinton, Ural 113. 



Low grounds, New Englaiul to Nortli Carolina, near tlie coast. 

 A striking plant, when once seen not soon forgotten. 



3. P. elongata Torr. Kuntze, Kev. Cen. PI. 7b3 (Ii>91j. I'liu 



