Glyceria. CLXI. GRAMINEiE. 613 



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

 longer.— 04- Ohio, W. S. Sullivant ! 

 0. Nuttalii. St. 8' high.— Mich. 



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



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

 contracted ; Ivs. 3 — 6' by 2", scabrous, acuminate shorter than the sheaths ; stip. 

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

 short, appressed; spiMcts Ih" long, 2-flowered, tumid; lower glume linear-ob- 

 long, upper larger, obovate, obtuse, puberulent ; pakcc equal, awnless, obtuse, 

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



3. K. TRDNCATA. Tom (Aira truncata. 3Iuhl. Holcus striatus. Linn.) 

 St. slender, 2f high ; Irs. 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 ; palece awnless. — % Fields and open woods. Can. to Ky. Jn. 

 /?. 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 ; panicle very slender, loose, 4 — 8' long ; spikelets about 3- 

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

 veined ; police awnless. — T\. Rocky woods, N. England (rare) to Ky. ! 111. 

 May, June. 



5. K. paniculata. Nutt. 



St. tall (2 — 3f high) ; lvs. elongated (4 — 6'), on long sheaths ; panicle ob- 

 long, glabrous ; spikelets 2-— 3-flowered, shining ; glumes a-\vnless, very unequal, 

 the larger one truncately obtuse. — 1\. Michigan-. Also Florida. 



39. TRICQSPIS. Palis. 



Lat. tre^, three, cuspis, a point ; alluding to the structure of the flowers. 



Spikelets terete, tumid, about 5-flowered ; glumes 2, unequal, cari- 

 nate, shorter than the flowers ; lower palea bifid-toothed, tricuspidate 

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

 most emarginate ; caryopsis 2-horned. 



T. sESLERioiDEs. Torr. (Poa. Michx. Winsoria poseformis. Nidt.) 

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

 beneath, lance-linear, veined, 12 — 18' long ; lower sheaths often hairy ; stip. ; 

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

 lanceolate, purple, shining, 4 — 5-flowered ; glumes unequal, mucronate ; lower 

 palea with 3 projecting veins.— 94. A splendid grass in sandy fields, N. Eng. to 

 111. and S. States. 



40. GLYCERIA. Brown. 



Gr. yXt)/cDf , sweet ; on account of the sweet taste of the seeds. 



Spikelets slender, many-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, long, slender, slightly branched ; spikelets 1 — li' 

 long, linear, appressed, a_bout lO-flowered ; jls. obtuse ; louver palea 7-veined, den- 

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



2. G. ACUTiFLORA. TorT. (Festuca brevifolia. MM.) 



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

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

 ered ; fls. very slender, acute, indistinctlv veined. — 94. Inundated meadows, N. 

 Eng., N. Y. June. 



