798 Obdeb 166.— GRAMINE^. 



"Wis. to Ohio, S. to Miss, and Ala. Upper half of culm naked. Pan. 4 to 6' b7 !I 

 to 3'. Apr. (South) to Jn. 



11 P. serotina Ehrh. Meadott Rbdtop. Foul ME.iDOW. Calm erect, weak, 

 2 to 3fj Ivs. narrowly-linear, flat, 10 to 15'; ligules elongated (2 to 3"), lacerate; 

 pan. (6' to 10' or 12' by 2' to 4'), branches in 5s, flexuous, capillary; spikelets 

 all pedicellate (1^- to 2"), 2, 3, rarely 4-flowered; fls. webbed, acute, tawny red 

 at apex, or at length colored throughout. — "Wet meadows and woods, common in , 

 the N. States and Can. Jn. — Aug. Varies with the spikelets all 2-flowered and 

 colored, on the diffuse, capillary branches (in woods and swamps), or all 3 or more- 

 flowered, branches sabereot. — Makes exceUent hay. 



12 P. nemoralis L. "Wood Spear Grass. Culm slender, 2 — 3f; Its. narrow- 

 linear, pale green, smooth as well as the sheaths; ligules scarcely any; pan. 6 — 10' 

 long, slender, nodding when in fruit, branches capillary, flexuous, in 53 (2s to 5a); 

 fls. very acute ; spikelets ovate, about S-flowered, spreading and at length remote, 

 slightly webbed at base. — If A tall thin grass, in wot, open woods, N". Eng. to 

 Wis. and Can. Jn., Jl. 



13 P. trivi^lis L. ifcuGii Meadow Grass. Culm sometimes stoloniferous at 

 base, roughish hackwards, 2 — 3f; Ivs. lance-hnear, acute, rough-edged, lower ones 

 very long, cauline as long as the roughish sheaths^ with long, acuminate ligules ; 

 panicle diffuse, expanding, scabrous, branches 4 — 5 together in half-whorls ; spike- 

 lets oblong-ovate, 2 — 3-llovTered. — 1( N". States. June, July. 



14 P. pratensis L. Spear Grass. June Grass. Culm terete, smooth, 1 — 2f ; 

 Ivs- cai'inate, linear, abruptly acute, radical ones very long and numerous, cauline 

 shorter than the veined, smooth sheaths ; lig. short, truncate; pan. diffuse, branches 

 3 — 5 together in half-whorls ; spikelets ovate, acute, with about 4, acute flowers ; 

 glumes lanceolate, rather acuminate. — 11 An excellent grass both for hay and 

 pasturage, very abundant. Apr. (South) May (West) Jn. (Xorth.) 



41. BRIZOPY'RUffl, Lint. ^{Briza, nvpog, wheat.) Spitelets oo- 

 flowercd, compressed, crowded in a spikelike panicle ; glumes herba- 

 ceous, unequal; pales awnless, subcoriaceous, lower compressed, but 

 not carinate, faintly many-veined, acute. — Lvs. mostly involute, smooth 

 and rigid. 



1 B. spioatum Hook. Culm branched at base, erect 1 to 2f ; cauline lvs. nu- 

 merous, 3 to 6' long; sheaths longer than the joints, close, upper ones hairy at 

 throat ; spike-liko pan. oval, yellowish, consisting of short, fasciculate branches 

 with sessile spikelets ; spkl. obloog, 5 to 9-flowered ; fls. triandrous. — Salt marshes, 

 S. Y. to Car. JL (Uniola ed. 2. Poa Michauxii Kuntli.) 



42. GLYCE'RIA, Brown. Manna Grass. (Gr. yXvaijg, sweet, on 

 account of the sweet taste of the grains.) Spikelets many-flowered, 

 teretish or turgid, racbis jointed ; glumes subequal, pointless ; pales 

 awnless, webless, berbaeeous, the lower usually 7-VLined, rounded on 

 the back (not carinate) ; stigmas doubly plumous ; ovary smooth, grain 

 free. — ZC Smooth grasses from creeping rhizomes in wet places, with 

 simple panicles. Sheaths mostly fistular (not split). 



S Salt marsh Grasses. Lower pale 5-veined. Stigmaa sessile, simply plumed Nos. 9, 10 



§ In fiesli swamiJS, &c. Lower pale 7-voiued. Stigmas doubly phimous. (a) 



a Spikelets linear-lanceolate, In a very simple panicle Nos. 1, 2 



a Spikelets linear-oblong, in compound, spreading panicles Nos. 3, 4 



a Spikelets ovate, short, turgid, — in slender, appressed panicles Kos. 5, C 



— in an open, recurved i>anicle Nos. 7, 8 



1 Q-. fluitans Brown. Culm compressed or anoipitous, ascending at base, 3 — 5f ; 

 lvs. lanee-linear, smooth beneath, about a foot long; sheaths veined, smooth, 

 with a very large stipule ; panicle secund, long, slender, slightly branched ; spike- 

 lets 8 to 10" long, linear, appressed, 1 to 12-flowered; fls. dbtv.se; lower pale 7- 

 veined, denticulate.— If Swales, &o. Can^ N. States to La. Jn., Jl (i'estuca 

 fluitans, L.) 



2 Q-. aoiitifl6ra Torr. Culm somewhat compressed, 1 — 2f; hi narrow, atten- 



