Glvceria, CLXI. GRAMINE^. 613 



an abortive pedicel ; glume linear-oblong, acute, serrulate on the keel, upper one 

 longer.— 11- Ohio, W. S. SuUivant ! 

 /3. NuUalii. St. 8' liigh.— Mich. 



2. K. oBTusATA. Torr. (Aira obtusata. Michx. ?) 



St. erect, geniculate below, leafy, 18 — 24' high ; 7iotIes pubescent, blackish, 

 contracted ; lis. 3 — G' by 2", scabrous, acuminate, shorter than the sheaths ; slip. 

 lacerate ; panicle contracted, 3 — 5' long, 6 — 12" diam., dense, branches fascicled, 

 short, appressed; spiJcekts 1^" long, 2-liowered, tumid; lower glume linear-ob- 

 long, upper larger, obovate, obtuse, puberulent ; palca: equal, awnless, obtuse, 

 scarious at summit, a little exserted. — % Ohio, SuUivant! 



3. K. TRUNCATA. Torr. (Aira truncata. Muhl. Holcus striatus. Linn.) 

 St. slender, 2f high ; Ivs. smooth, narrow, 4 — 6' long ; panicle oblong, 



loose, racemose ; spikelets 2-flowered, in clustered racemes, on short, suberect 

 branches ; glumes subequal, the lower one linear, upper one much broader, very 

 obtuse or truncate ; palecR awnless. — % Fields and open woods, Can. to Ky. Jn, 

 S. major. Lvs. broad-linear, very long; panicle large, spreading. 



4. K. Pennsylvanica. DC. (Aira mollis. Muhl.) 



St. smooth, 2 — 3f high; nodes black; lvs. 1 — 2' long, narrow, flat, lower 

 ones soft pubescent; 2)ayiicle very slender, loose, 4 — 8' long; spikelets about 3- 

 flowered, shining ; lower glume linear, upper otic much broader, oblanceolate, 3- 

 veined ; palccc awnless.-^ IJ. Rocky woods, N. England (rare) to Ky. ! 111. 

 May, June. 



5. K. PANICULATA. Nutt. 



St. tall (2 — 3f high); lvs. elongated (4 — G'), on long sheaths; panicle ob- 

 long, glabrous ; spikelets 2 — 3-flowered, shining ; glumes awnless, very unequal, 

 the larger one truncately obtuse. — % Michigan. Also Florida. 



39. TRICLTSPIS. Palis. 



Lat. tres, three, cuspis, a lioint ; aJluding to the structure of the flowers. 



gpikelets terete, tumid, about 5-flowered ; glumes 2, unequal, eari 

 nate, shorter than the flowers ; lower palea bifid-toothed. tricuspidat« 

 by the projecting keel and two lateral veins, upper one truncate, al 

 most emarginate ; caryopsis 2-horued. 



T. sEsi.ERiolDEs. Torr. (Poa. Michx. Winsoria poaeformis. Null.) 

 False Rcd-tov. — St. very hard and smooth, erect, 4 — 5f high ; lis. smooth 

 beneath, lance-linear, veined, 12 — 18' long; loirer sheaths oilen hairy; stip.O; 

 panicle loose, expanding, branches flexuous, smooth, long; spikelets ovate- 

 lanceolate, purple, shining, 4 — d-Qoweved; glumes unequal, mucronate; lower 

 palea with 3 projecting veins.— ^ A splendid grass in sandy fields, N. Eng. to 

 111. and S. States. 



40. GLYCERIA. Brown. 



Gr. y^vKv;, sweet; on account of the sweet taste of the seeds. 



Spikelets slender, inany-flowered ; glumes 2, unequal, veinless, 

 truncate, shorter than the flowers ; lower palea herbaceous, embrac- 

 ing the upper, bidentate one ; scales connate, truncate. 



1. G. FLUiTANs. Brown. (Festuca fluitans. Linn.) 



St. compressed or ancipitous, ascending at base, 3 — 5f high ; lvs. lance- 

 linear, smooth beneath, about a foot long; sheaths veined, smooth, with a very 

 large stipule; panicle secund, Ion?, slender, slightly branched; spikelets 1 — IJ' 

 long, linear, appressed, about 10-flowered; Jls. obtuse; Imocr palea 7-veined, den- 

 ticulate. — % Aquatic. N. and N. W. States. June, July. 



2. G. AcuTiFLORA. Torr. (Festuca brevifolia. Muhl.) 



St.. somewhat compressed, 1 — 2f high ; lvs. narrow, attenuated above, half 

 as long as the stem ; jjaniclc simple, long, appressed ; spikelets linear, 4 — 6-flow- 

 ered ; fls. very slender, acute, indistincdv veined. — %. Inundated meadows, N. 

 Eng., N. Y, June. 



