638 GRAMINEiE. (GRASS FAMILY.) 



at length jomcwhat involute leaves, crowded spikclcts, blunt an<l riyid glumc.s, 

 and pointless or mucronate-tipped palets ; the rhaehis not disarticulating- as in 

 T. junccum, L. (Eu.) 



2. T. dasyst^2hyum, Gray. Perhaps a remarkable variety of the last, 

 but the glaucous leaves are narrow and often involute, and the 5 - 9-flowcred 

 spihelets dinselij (lowriij-hairi/ all over. (T. rejiens, var. dasystachyuni, Hook.) — 

 Sandy shores of Lakes Huron and Sujjerior, and northward. Aug. 



» * iS'o obvious running rootstocks, glabrous, or the flat and roughish leaves soinetimes 

 Jtairi/ above: glumes as well as flowers moslty owned or aun-pointed . 



3. T. violaceum, Horncmann. Spike dense, strict and rigid, usually tinged 

 with violet or jiurple, ; spikelets .3 - 5-flo\vered ; glumes conspicitotisli/ ^-nerved; 

 mens straight, varying from half to nearly twice the length of the palet. (T. 

 Richardsbnii, Schrader. T. pauciflorum, Sr.hweinitz.) — Mountains of Penn. 

 {Porter) ; in the alpine region of the "White Mountains (Tuekemmn), Wiscon- 

 sin (Dipliain), and northward. — Intennediaie in character between tlie last and 

 the next. (Eu.) 



4. T. caninum, L. (Awned Wiieat-Gr.a.ss.) , Spike usually more or less 

 nodding, at least in fruit, rather dense (.y-C long); spikelets 3-5-flowcred; 

 glumes S-H-nerved ; awns mostli/ somtwhul bent or sprmding, fully twice the length of 

 the palet. — Sparingly naturalized in cult, ground and meadows. Indigenous 

 along our northern borders, in a slender form, which approaches the northwest- 

 ern T. divergens, Necs, or T. wgilopoides, Turczaninow, which has narrow and 

 convolute leaves, S-T-nerved glumes, and widely diverging awns. (Eu.) 



45. HORDEUM, L. B.vrley. (D. U.) 



Spikelets 1 -flowered, with an awl-shaped rudiment on the inner side, three at 

 each joint of the rhaehis ; but the lateral ones usually imperfect or abortive, and 

 short-stalked. Glumes side by side in front of the spikelets, 6 in number, form- 

 ing a kind of involucre, slender and awn-pointed or bristle-form. Palets herba- 

 ceous, the lower (anterior) convex, long-awned from the apex. Stamens 3. 

 Grain oblong, commonly adhering to the palets. Si)ike often separating into 

 joints. Ours are annuals or biennials, or scarcely perennial. (The ancient 

 Latin name.) 



1. H. jub^tum, L. (SQriRREL-T.\.iL Grass.) Low; lateral flowers 

 abortive, on a short pedicel, short-awned ; the perfect flower bearing a capillary 

 awn (2' long) about the length of the similar capillary glumes, all spreading. — 

 Sandy sea-shore, upper Great Lakes, and westward. June. 



2. H. pratense, Huds. Low (6'- 18' high) ; lateral flowers imperfect or 

 neutral, awnlcss or merely pointed ; perfect flower with awn as long as tliose of 

 the glumes (3"- 6") ; spike linear, l'-2' long. (IL pnsillum, Xult. and former 

 ed.) — Plains, especially in saline soil, Ohio to Illinois and westward : also spar- 

 ingly introduced, Virginia and southward along the coast. 'May, June. (Eu.) 



46. ELYMUS, L. Ly.me-Grass. Wild Rve. (PI. 11.) 



Spikelets 2-4 at each joint of the rhaehis, all fertile and alike, sessile, each 

 1 - "-flowered. Glumes conspicuous, nearly side by side in front of the spikelets. 



