GLYCERIA. CLXI GRAMINEZ. 613 
an abortive pedicel; giwme linear-oblong, acute, serrulate on the keel, upper one 
longer.— 2. Ohio, W. S. Sullivant! - 
B. Nutiala. St. 8’ high.—Mich. 
2. K. oprusata. Torr. (Aira obtusata. Micha. ?) 
St. erect, geniculate below, leafy, 18—24’ high; nodes pubescent, blackish, 
contracted ; lvs. 3—6’ by 2”, scabrous, acuminate, shorter than the sheaths; stip. 
lacerate ; panicle contracted, 3—5’ long, 6—12" diam., dense, branches fascicled, _ 
short, appressed; spikelets 13/' long, 2-flowered, tumid; lower glume linear-ob- 
long, upper larger, obovate, obtuse, puberulent; palee equal, awnless, obtuse, 
scarious at summit, a little exserted—2| Ohio, Sullivant ! 
3. K. truncAra. Torr. (Aira truncata. Muil. Holcus striatus. Linn.) 
St. slender, 2f high; lvs. smooth, narrow, 4—6’ long; panicle oblong, 
loose, racemose ; spikelets 2-flowered, in clustered racemes, on short, suberect 
branches ; glwmes subequal, the lower one linear, upper one much broader, very 
obtuse or truncate; palee awnless.—2| Fields and open woods, Can. to Ky. Jn. 
8B. major. Lws. broad-linear, very long; panicle large, spreading. 
4. K. Pennsytvanica. DC. (Aira mollis. Muii.) 5 
St. smooth, 2—3f high; nodes black; Wws. 1—2’ long, narrow, flat, lower 
ones soft pubescent; panicle very slender, loose, 4—8’ long; spikelets about 3- 
flowered, shining ; lower glume linear, wpper one much broader, oblanceolate, 3- 
veined; palee awnless.—2 Rocky woods, N. England (rare) to Ky.! Ill. 
May, June. 
5. K. panicuLatTa. Nutt. 
St. tall (2—3f high); lvs. elongated (4—6’), on long sheaths; panicle ob- 
long, glabrous ; spikelets 2—3-flowered, shining ; glwmes awnless, very unequal, 
the larger one truncately obtuse.—2| Michigan. Also Florida. 
39. TRICUSPIS. 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. sESLERIOIDES. Torr. (Poa. Miche. Winsoria poxformis. Nutt.) 
False Red-tov.—St. very hard and smooth, erect, 4—5f high; Ivs. smooth 
beneath, lance-linear, veined, 12—18’ long; lower sheaths often hairy; stip. 0; 
panicle loose, expanding, branches flexuous, smooth, long; spikelets ovate- 
lanceolate, purple, shining, 4—5-flowered ; glumes unequal, mucronate; lower 
palea with 3 projecting veins.—2| A splendid grass in sandy fields, N. Eng. to 
Ill. and S. States. : ' 
40. GLYCERIA. Brown. 
Gr. ydvxvs, 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. riuirans. Brown. (Festuca fluitans. Linn. 
St. compressed or ancipitous, ascending at base, 3—5f high; lws. lance- 
linear, smooth beneath, about a foot long; sheaths veined, smooth, with a very 
large stipule; panicle secund, long, slender, slightly branched; spikelets 1—14' 
long, linear, appressed, about 10-flowered ; fis. obtuse ; lower palea 7-veined, den- 
ticulate-—2 Aquatic. N.and N. W. States. June, July. 
2. G. acutirLora. Torr. (Festuca brevifolia. Mu/l.) 
St. somewhat compressed, 1—2f high; lvs. narrow, attenuated above, half 
as long as the stem ; panicle simple, long, appressed ; spikelets linear, 4—6-flow- 
ered ; fis. very slender, acute, indistinctly veined.—?| Inundated meadows, N, 
Eng., N. Y. June. 
