GRAMINE^. 



445 



1. K. irunca'ta. Torr. 



Slem slender, 2 feet high ; leaves smooth, narrow, 4 — 6 inches long; panicU 

 oblono-, loose, racemose ; spikelets 2-tiowered, in clustered racemes, on short, 

 suberecl branches; ^/wmejs subequal, the lower one linear, upper one much 

 broadt-r, very obtuse or truncate ; pateoi awnless. Fields and open woods. Jn. 



/3. major ; leaves broad-linear, very long; panicle large, spreading. 



2. K Pennsylva'nica. 



Stem smooth, 2 — 3 feet high, nodes black ; leaves 1 — 2 inches long, narrow, 

 flat, lower ones soft pubescent; panicle very slender, loose, 4 — S inches long ; 

 siiikelets about 3-flowered, shining ; lower glume linear, upper one much 

 broader, oblanceolale, 3-nerved ; fjaiecE awnless. Rocliy woods. May. June. 



34. TRICU'SPIS. 



Spikelets terete, tumid, about 5-flovvered ; glumes 2, un- 

 equal, carlnate, shorter than the flowers; lower palea bitid- 

 toothed, tricuspidate by the projecling keel and two lateral 

 nerves, upper one truncate, almost emarginate; caryopsis 

 2-horiied. 

 T. sf.slerioi'df.s. False Rtd-tnp. 



Slem very hard and smooth, erect, 4 — 5 feet high ; leaves smooth beneath, 

 lance-linear, nerved, 12 — \6 inches long; luir.er sheaihs olten hairy ; stipules 

 ; panicle, loose, expanding, branches tlexuous, smooth, long; spikelets (jva.le- 

 lanceolate, purple, shining, 4 — 5-flowered ; ^/j/wes unequal, mucronate ; 

 lower palea with 3 projecting nerves. A splendid grass in sandy fields. Aug. 



3 5. G L Y C E' R 1 A . 

 Spikelets slender, many-floweied ; glumes 2, unequa!, 

 nerveless, truncate, shorter than the flowers; lower palea 

 herbaceous, embracing the upper, bidentate one ; scales con- 

 nate, truncate. 



1. G. FLu'iTANS. Br. Festuca fluitan's. L. 

 Stem compressed or ancipitous, ascending at base, 3 — 5 feet high ; leaves 



lance-linear, smooth beneath, about a foot long; ihealhs nerved, smooth, willi 

 a very large stipule ; panicle secund, long, slender, slightly branclied ; spikelets 

 Ion"-, linp;u-,appressed, about 10-flovvered ; Jluicers obtuse ; lower palea7-neT\- 

 ed, denticulate. Aquatic. June. July. 



2. G. acutiflo'ra. Torr. 



Slem somewhat compressed, 1 — 2 feet high; leaves narrow, attenuated 

 above, half as long aa the stem; »/nic/e simple, long, appresscd ; spikelets 

 linear, 4 — G-flowered ; Jluicers very slender, acute, indistinctly nerved, la- 

 undated meadows. Jn. 



3G. POA. 

 Spikelets compressed, ovate, oblong or linear, many-flow- 

 ered (3 — 20); glumes 2, shorler than the lower flowers; 

 paleiE subcqual, awnless, often wiih an arachnoid web at base, 

 the lower one herbaceous, scarious on the margin ; scales 

 ovate, acute, smooth. 



* Flowers weUied al base. 

 1. P. prate'.nsis. L. Spear Grass. P- viridis. Muh. 



Stem terete, smooth, 1—2 feet high ; leaves carinate, linear, abruptly acute, 



