ORDER 156. GRAMUSTE^E. 799 



Uated above, half as long as the stem ; panicle simple, long, raceme-like, appressed ; 

 spikelets linear, 9 to 12" long, 4 6-flowered; distant fls. very slender, acute, in- 

 distinctly veined. 7J. Inundated meadows, N. Eng., N". Y. June. (Festuca bre- 

 vifolia Muhl.) 



3 G. aquatica Smith. Culm stout, leafy, 4 to 5f; Ivs. broad-linear, flat, thin; 

 pan. erect, diffuse, branches at length spreading, flexuous, 3 to 5 together, in, 

 half whorls; spikelets linear-oblong, purple, 2 to 3" with 6 to 8 ovate-obtuse flow- 

 ers. 1J. Wet meadows, N. States and Can. A largo and handsome grass, culti- 

 vated for hay in Eur. (Poa, L.) 



4 G. pallida Trin. Culm weak decumbent, ascending 1 to 2^f; Ivs. flat, linear, 

 10 to 16' long, glaucous beneath; stip. elongated; pan. loose, few-flowered, 

 branches capillary, spreading; spikelets 3", oblong-linear, 5 to 9-flowered ; lower 



flume 3-veined; lower palea 5-veined, 5-toothed at the apex when old. 2^ 

 wamps, Can. to Ya. and West? June, July. (Poa dentata Torr.) 



5 G. nervata Trin. Culm smooth, 3 to 4f ; Ivs. lance-linear, striate, rough above, 

 about a foot long, on striate, roughish sheaths ; lig. lacerate ; pan. large, loose, dif- 

 fuse, equal, branches weak, pendulous in fruit, long and capillary, in 2s or 3s; 

 spikelets ovate-oblong, containing about 5, obtuse, conspicuously 7-veined flowers, 

 U A valuable grass in wet meadows, K Eng. to 111. Jn. (Poa, Willd.) 



6 G. elongata Trin. Culm round, erect, smooth, 3f ; Ivs. narrow-linear, smooth, 

 8 to 15' long; eheaths striate, smooth; lig. very short; pan. (8 to 10') elongated, 

 raceme-like, nodding, branches solitary or in 2s, appressed ; spikelets ovate-obtuse, 

 tumid, containing about 3 obtuse, 5-veined flowers. If Wet meadows, N. Eng. 

 to Penn. and 111. Jl. (Poa, Torr.) 



7 G. obtusa Trin. Culm smooth, firm, 2 to 3f; Ivs. dark green, linear, often 

 surpassing the culm, and with the sheaths smooth ; pan. dense, ovate, many -flow- 

 ered, 3 to 4', erect; spikelets ovate, acute, tumid, thick, containing 5 to 7, smooth, 

 ovate, obtuse flowers ; lower pale obscurely 7-veined. If Swamps, N. Eng. to 

 Penn. Aug., Sept. (Poa, Muhl.) 



8 G. canadensis Torr. Culm round, smooth, erect, 3 to 4f ; Ivs. broad-linear, 

 rough, glaucous, on smooth sheaths ; lig. lacerate, ovate-obtuse ; pan. large, 6 to 

 8' long, branches flexuous, in half whorls, much spreading or pendulous in fruit; 

 spikeleta short, ovate, tumid, 6 to 8-flowered; glumes much shorter than the 

 lower flower ; upper pale very obtuse, lower about 7-veined ; stam. 2. 2f A large 

 grass, in shady grounds, N". States, Can. Jl., Aug. (Poa, Torr.) 



9 G. maritima Wahl. Culm somewhat geniculate, round, about a foot high ; 

 Ivs. somewhat glaucous, rough-edged, involute ; pan. erect, dense, branches in pairs, 

 scabrous ; spikelets terete, linear, purplish, about 5-flowered ; fls. obtuse, indis- 

 tinctly 5-veined. If Salt marshes, Mass. Jn. (Poa, Huds.) 



10 G. distans Wahl. Very smooth ; culm firm and leafy, oblique, round, 

 branched at base, 1 2f ; Ivs. flat, lance-linear ; pan. spreading, branches fascicu- 

 late, in 3s to 5s, crowded, straight ; spikelets oblong, somewhat racemed, sessile, 

 crowded, about 3-flowered; glumes minute, unequal. If Salt marshes, N. Y. 

 (Poa fasciculata Torr.) 



43. BRPZA, L. QUAKING GRASS. (Gr. /3pt'o), to nod, as in sleep ; 

 alluding to the pendulous spikelets.) Spikelets cordate, 6 9-flowered ; 

 glumes 2, shorter than the lower flowers ; paleaa ventricous, lower one 

 cordate at base, embracing the upper which is suborbicular and much 

 shorter ; caryopsis beaked. Paniculate spikelets large, drooping on 

 slender pedicels. 



1 B. media L. Culm naked above, 1 2f; Ivs. flat, smooth, lance-linear; stip. 

 short, obtuse; pan. erect, few-flowered, branches wide-spreading, capillary, pur- 

 plish, bearing the ovate cordate, tumid, pendant and tremulous spikelets at the 

 ends, these are about 1-flowered, greenish-purple ; palea3 veinless. If Meadows 

 ' and pastures, coastward, N. Eng. to Penn. May. Eur. 



2 B. maxima L. Pan. nodding at the summit; spikelets oblong, cordate, 

 13 to 17-flowered. Q Gardens, occasionally cultivated as ornamental." f Eur. 



