Oedkr 156— GBAMINB^. 801 



brakes and soaroely ever flower. The firm, jointed, hollow, straight and taO 

 culms are variously useful 



47. LEPTU'RUS, Br. Spikelet 1 on each joint of the filiform rachis, 

 immersed in a cavity, 1 or 2-flowered ; glumes coriaceous, acute, the 

 lower often wanting ; pales membranous, awnless, shorter than the 

 glumes ; grain free. — Lvs. and spikes very narrow. 



I«. panicul^tus Nutt. Culm scarcely If, compressed ; lvs. short, rigid, sheathing 

 the base of the panicle ; pan. or naked rachis incurved, acutely triangular, rigid, 

 bearing 6 — 10 compressed, subulate spikes on one side, each 1 — 2' long; spike- 

 lets remote, on one side the rachis ; glumes rigidly fixed, unequal, parallel ; paleas 

 2, the outer of the same texture as the glumes, inner membranaceous. — 111. (Mead), 

 Mo. (Nuttall). 



48. HOR'DEUffl, E. Barley. (The ancient Latin name.) Spike- 

 lets 3 at each joint of the rachis, 1-flowered, the lateral ones sometimes 

 abortive ; glumes 2, subulate, nearly equal, awned ; paleaj 2, lower 

 lance-ovate, long-awned, upper obtusely acuminate ; caryopsis adhering 

 to the palese. 



1 H. vulgare L. FotrE-ROWED Bakley. Cuhn smooth, 2 — 3f; lvs. lance-lin- 

 ear, carinate, nearly smooth ; sheaths auriculate at the throat ; spike thick, about 3' 

 long ; spikelets all fertile, 1-flowered, with an awn-like rudiment at the base of 

 the upper palea ; glumes collateral, shorter than the flowers ; fr. arranged in 4 

 T0W3. — y Extensively cultivated. May. 



2 H. distichum L. Two-bowed Barley. Culm 2 — 3f; lvs. lance-linear, 

 scabrous above ; sheaths auriculate at the throat ; spike 3 — 4' long, linear, core- 

 pressed ; lateral spikelets abortive, awnless ; fr. arranged in 2 rows. — ^ More 

 common, and is generally preferred for malting to the former species. June. 



3 H. jubatum. L. Squierel-tail Grass. Culm slender, round, smooth, simple^ 

 about 2f; lvs. broad-linear, i — 6' long, rough-edged, otherwise smooth, as well 

 as the sheaths ; spikes 2 — 3' long spikelets with the lateral flowers neuter ; 

 glumes and paleae produced into fine, smooth avms, 6 times as long (2') as the 

 flowers; abortive flowers on short pedicels. — ©Marshes, N. Bng. to Mo., N. to 

 Subaro. Am. June. 



4 H. pusiUum Nutt. Culm 4 — 6', decumbent or geniculate at the base; lvs. 

 about IJ' long, rather obtuse, glaucous, striate ; upper sheath tumid, embracing 

 the spike; spike linear, about IJ' long; glumes by 3s, collateral, imbricated, 

 lateral ; abortive fls. awnless ; awn of the central sessile ? , as long as those of the 

 involucre, twice the length (7") of the pales, glumes all awned, the inner setaceous 

 from the base. — Ohio to 111. and Mo. 



49. EL'YMUS L. Lyme Grass. Wild Rye. (Gr. eXvw, to en- 

 velop ; as the spike in the sheath.) Spikelets 2 to 4 at each joint of 

 the rachis, 2 to 6-flowered ; glumes 2, subequal, subulate, both placed 

 on the outer side of their spikelet forming an involucre to the group, 

 sometimes minute or obsolete ; pales lanceolate, coriaceous, the lower 

 mostly awned. 



5 Eltmits proper. Involnore present, consisting of the oonspiouons glnmes (a) 

 a Spikelets 1 to 5-flowered, liard, rough, with conspicuous awns, (b) 



b Spikelets glabrous, merely rough, 2 or 8-flflwered Nos. 1, 4 



b Spikelets hispid with hairs, 1 to 3, or 2 to 5-flowered Nos. 8, 4 



a Spikelets 5 to 8-flowered, eoft-pubescent, without awns No. S 



E QYaNOSTAOHtTM. Inyol. obsolete Or the gls. minute. Awns divaricate. No. '6 



1 B. Virginicus L. Culm smooth, 3 or 4f, erect ; lvs. lance-linear, flat, scabrous, 

 deep green, 4" broad ; sheaths striate ; lig. very short ; spike erect, thick, 3 to 6' 

 lono- • spikeUts in pairs, 2 or ^-flowered, the collateral glumes in front, thickened 

 and subconnate at base, striate, and with the pales, produced into rather shyrt (6 

 to 10"), scabrous awns.—H Banks of streams, U. S. A Southern variety has 

 ' the glumes very thick and arcuate at base (like E. Caput-Medusse L.). Aug. 



51 



