liLYJiitS GRAMINfi^ 779 



leaves 10-20 inches long, 2-4 Hiies wide, smooth beneath, scabrous abov«j 

 gradually' til t^^ling into Very acute pungent tips: spikes linear, sometitneB 

 hran^bing'ahd'panicled: 'Bt>ikeletB 3-6-flowered, 6^12' lines long, villbu's 

 with long whitish or yellowish hairs: empty glumes lanceolate, subariBta|6- 

 pointed: flowering glumes broadly la&ceolate, very acute, densely siUcy- 

 viUous on the back : flowering glumes 6-7 lines long. On sand dunes along 

 the Columbia river near the Dalles. 



E. dasystachys Trini Ledeb. Fl. Alt. i, 120. Stems Stout, smooth, 

 2-3 feet high, from, stout creeping rootstocks : Sheaths smooth or scabrous, 

 shorter than (he intiernodes'.' ligules very ^h<yrt : leaves rigid, more or less 

 involute, pungent-pointed, 4-18 inches long, 2-4 lines wide : spike 'strict, 3-6 

 inches long: spikelets 2 at each' joint, 30^12 lines long, closely imbricated, 

 4-7-flowered: empty . glumes, equal, 7-8 lines long, more .or less cil^te, 

 short-awned, narrowly * lanceolate 3-nerved: flowering glumes,' more -'or 

 less pubescent,' slightly ciliate, 10-12 lines long,: short-awned. Washington i 

 to Alaska and Montana. ,, ; 



, E. littoralis Turcz. Stems rather stout and somewhat rig|d, erect/ 

 37:4 feet high, glabrous,: sheathsglabrous,, the lower ones scaripns, loos^ 

 and sometimes bladeless : ligule3'Vei;y short, minutely ciliate : leaves 10-2() 

 inches Ibng, 2-3 linfes'widp; glabrous benieath; strongly strigose-tiubesceiit; 

 above, very long acuminate-pointed, becoming involute: spikes 10-12 

 inches long, rather loosely flowered, often branched : spikelets S-O-flbwered;! 

 empty glumes narrowly lanp.ePtlate, scabrous on the keel, especially toward! 

 the rigid subulate apex ;, .flbweritag glumes' 7-9 line^ long, lanceolate, very 

 acute,' or silbariBtate-pointed, S-nerved, scariousinairgined' rather densely 

 pubescent on the bitck below, the upper third glabrous. Eastern Wash- 

 ington to Idahio. 



£, eondensatns PEesI Kel. Hienk. i, 265. Stems erect, smooth, 2-10 

 feet high : sheaths glabrous, the upper ones shorter than the internodes : 

 ligules 2-3 lines long, truncate: leaves 6-20 inches long, 3-11 lines wide, 

 scabrous above : spike 4^16.inahes Ipngt usually stout, StKict, often interrupt- ' 

 ed below, sometimes branched At the base i. spikelets 3-6-flowered; empty 

 glumes subulate, 4>i-6 lines long, 1-nerved, usually rough : flowering 

 glumes 4-5 lines long, generally awn-pointed, usualjljr scabrous. Common 

 from eastern Oregon and Vyasjiington to Brit. ColiinPibia, Nebraska, Arizona 

 and' Calif prnia. ^ ': 



E. triticoldes Buckl. Proc. Acad. Phila.'99. Stems rather slender, 

 2-4 feet high: ligules very shor,t: leaves 7-12 inches long, na^w, often 

 involute, the upper equalling or exceeding the stem : spikes S-Siijqiies long, 

 erect: spikelets 4-8-nowered, spn^e^imeg, glaucous: empty glumes linear- 

 lanCeolate, rigid, long-pointed, 4-6 liues long: flowering glumes firm, Ian-, 

 ceolate, acuminate or sbort-^wned, 7-nerved. Washington to California 

 and thp Kocky M[puntajns. , / .• • ' 



E. glaiicns Biickl. 1. c. E. AmeHcanm Vany ASeribn. Stems 

 erect, 2-5 feet high, smooth : s^ea^hs often shorter than the internodes, 

 usually glabrous : ligules 1 line Ipngor less: leaves 4-12 inches long, 2-8 lines 

 wide, smooth beijeath, sometimes scabrous a\)ove: spike 5-8 iaches long, 

 stehders spikelets appressed (p the ra^his, 3-6 flowered: emflty glumes 

 narrowljn lanceolate, 4-6 lines long, a^^iuminate or awn-pointed, ngtd, 3-5- 

 nerved: "flbwering glumes smooth ox slightly scabrous, 5-6 lines long : bear- 

 ing a slender straightawn 6-9 lines long. In moist soil California to Brit. 

 Columbia, Ontario, Michigan iarid-Arizdiia,' . ' 



E. Canadensis L. Sp. 83. , Stems erect, 2-5 fee^t high, smooth : sjieaths 

 usiially shorter than the internodes : ligules very short r leaves '4i-12 inches 

 long 5-10 lines widls; ^CatroiiS; soinetim^s glaucous: spik* 4-12 inches 

 long' stout, oftfen nodding : spikelets' Spreading, 3-5 flowered :' empty 

 glumes narrowly lainceolate,' or subulate, rigid, 3^5-Tierved',4-8 linteS long; 



