Glyckria. CLXI. GRAMINEiE. 613 



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

 longer.— 7|. Ohio, \V. S. SuUlvant ! 

 ^. Nuttalii. St. 8' high.— Mich. 



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



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

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

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

 short, appressed; spikelets \^" long, 2-flowered, tumid; lower glume linear-ob- 

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

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



3. K. TRUNCATA, Torr. (Aira truncata. 3IuhI. 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 ; palca; awnless. — % Fields and open woods, Gan. to Ky. Jn. 

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



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



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

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

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

 veined ; palcce awnless,— 7{. Rocky woods, N. England (rare) to Ky. ! 111. 

 May, June. 



5. K. PANICULATA. Nutt. 



St. tall (2 — 3f high^ ; Irs. elongated (4 — 6'), 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. TRIG US PIS. Palis. 



Lat. tres, 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. sKSLERioiDEs. Torr. (Poa. Michx. Winsoria poasformi.s. Nutt.) 

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

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

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

 lanceolate, purple, shining, 4 — b-Howered; glumes unequal, mucronate; lo^cer 

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

 III, and S, States. 



40. GLYGERIA. Brown. 



Gr. y'XvKvs, sweet ; on account of the aweet taste of the seeds. 



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

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

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



1. G. KLuiTAN.s. Brown. (Fcstuca fluitans. Linn.) 



St. compressed or ancipituus, a.scending at ba.se, 3 — 5f high ; lvs. lance- 

 linear, smooth beneath, alK)ut a foot long; sheaths veined, smooth, with a very 

 large stipule; panicle serund, long, slentler, slightly branched ; spikcltts 1 — \\' 

 long, linear, appn-ssc-d, nlx)ut lO-flowercd ; fls. obtuse; hirer palea 7-veincd, den- 

 ticulate.- '4 A(iuatic. N. and N, W, Slates. June, July. 



2. G. ACUTirr.oRA. Torr. (Festura brevifolia. Muhl.) 



St. .somewhat compres.sed, 1— 2f high; /«-.<:. narrow, attenualrd above, half 

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

 ered ; p. very slender, acute, indi.slinctlv vcmed.— ?| Inundated meadows, N. 

 Eng., N. Y. June. 



