GRASS FAMILY. 



3. Elymus Canadensis L. Nodding Wild Rye. ( 1 i 



Canadensis L. Sp. PI. 83. 1753. 

 j-;tiinsglauci/oliusWi\\d. Knum. i: 131. 1809. 

 Jitynius Canadensis var. glaucifolius Torr. Fl. U. S. i- 

 137. 1824. 



Culms 2}4-5 tall, erect, simple, smooth and gla- 

 brous. Sheaths usually overlapping; ligule very 

 short; leaves 4 / -i long or more, 2 // -io // wide, 

 rough, sometimes glaucous; spike 4 / -i2 / in length, 

 broad, stout, often nodding, its peduncle much ex- 

 sertcd; spikelets divergent from the rachis, 3-5- 

 flowered; empty scales narrowly lanceolate or awl- 

 shaped, rigid, 3-5-nerved, 8"-i6" long, including the 

 long slender rough awns; flowering scales 4"-7" long, 

 nearly smooth to hirsute, bearing a slender scabrous 

 straight or divergent awn io // -25 // in length. 



On river banks, Nova Scotia and New Brunswick to AT 

 berta, south to Georgia, Texas and New Mexico. Ascends 

 to 2100 ft. in. Virginia. July-Aug. 



4. Elymus glaucus Buckl. Smooth Wild Rye. (Fig. 536.) 



Elymus glaucus Buckl. Proc. Acad. Phila. iMa: 99. 



Elymus Americanus V. & S.; Macoun. Cat. Cn. PI 4 



245. 1888. 



Elymus Sibiricus var. Amtricaittu Wats, ft Coolt to A. 



Gray, Man. Ed. 6, 673. 1890. 



Culms 2-5 c tall, erect, simple, smooth and gUbron*. 

 Sheaths often shorter than the internode*. asoally 

 glabrous, rarely pubescent; ligule i" long or le*; 

 leaves 4 / -l2 / long, 2 // -8' / wide, smooth beneath. 

 sometimes rough above; spike 3'-8' in length, nar- 

 row, slender; spikelets apprcssed to the rachis, 3-6- 

 flowered; empty scales narrowly lanceolate. 4"-6" 

 long, acuminate or awn-pointed, rigid, 3-5-nenred; 

 flowering scales smooth or slightly rough. 5"-6" long. 

 bearing a slender straight rough a\vn 6"-^" in length. 



In moist soil, Ontario to : umbta. MMth to 



Michigan, Arizona and California. June Auc 



5. Elymus Macounii Vasey. Macoun's Wild 

 Rye. (Fig. 537.) 



Elymus Macounii Vasey, Bull. Torr. Club, 13: 119. 1886. 



Culms i-3 tall, erect, simple, smooth and glabrous. 

 Sheaths shorter than the internodes; ligule very short, 

 truncate; leaves 2 / -6 / long, i"-2#" wide, rough, es- 

 pecially above; spike 2 / -5 / in length, narrow, slender, 

 often somewhat flexuous; spikelets appressed to the 

 rachis, single at each node, or the lower sometimes in 

 pairs, 1-3- flowered; empty scales (occasionally 3) awl- 

 shaped, 3-nerved, rough, $"-4". long, bearing a slender 

 straight rough awn, $"-*>" in length; flowering scales 

 3#"-5" long, rough toward the apex, bearing a slender 

 straight awn $"-$" long. 



Prairies, Manitoba and Assiniboia, south to Nebraska and 

 Mexico. July-Aug. 



