GRASS FAMILY. r 



2. Agropyron dasystachyum (Hook.) Vasey. Northern Wheat-gwm 



(Fig- 525.) 



Triticum repens var. dasystachyum Hook. PI. Bor. Am. a- 

 254- 1840. 



Agropyrum dasystachyum Vasey, Spec. Rept. U. S. Dept. 



Agric. 63:45. 1883. 



Glaucous, culms i-3 tall, erect, from long running 

 rootstocks, simple, smooth and glabrous; sheaths 

 shorter than the internodes; ligule very short; leaves 

 2 x -9' long, !"-$" wide, flat, or becoming involute in 

 drying, smooth beneath, rough above; spike 2#'-7' in 

 length; spikelets 4-8-flowered; empty scales 3-5-nerved, 

 lanceolate, acuminate or short-awned, $"-4%" long; 

 flowering scales broadly lanceolate, 5-nerved, 4^ // -6 // 

 long, acute or short-awned, densely villous. 



Hudson Bay to the Northwest Territory and Wyoming 

 and to the shores of I<akes Huron and Superior. Summer. 



3. Agropyron violaceum (Hornem.) Vasey. 



(Fig. 526.) 



Purplish Wheat-grass. 



ornem. Fl. Dan. />/ 3044. IBJ 

 Agropyrum violaceum Vasey, Spec. Kept. U. S I 



63:45. 1883. 



Culms 6 / -2 tall, erect, simple, smooth and glabrous. 

 Sheaths usually shorter than the internodes; ligule vcrjr 

 short; leaves 2'-6' long. i"-$" wide, flat or in TO! ale, 

 rough or sometimes smooth beneath; spike i' 4' in 

 length, occasionally longer, 2"~3" broad; pikelets 3-6- 

 flowered; empty scales broad, usually purplish, 

 on the margins, 5-7-nerved, 4 // -6" long, acute or 

 inate, sometimes awn-pointed, rarely long-awned; flow* 

 ering scales often purplish, 5-7-nerved, carious on the 

 margins, 4 // -6 // long, acuminate or short-awned, the awn 

 rarely as long as the body. 



Quebec to western Ontario ami British Columbia, math to 

 the mountains of New Kiuilancl. N 



and in the Rocky Mountains t (. \-tcrixb to 5300 ft 



in the White Mountains. A1-" in n.'tthcrn Knrope i 

 Summer. 



4. Agropyron tenerum Vasey. Slender Wheat-K' 



Agropyrum tenerum Vasey, Coult. Bot. Gaz. 10: 

 258. 1885. 



Glabrous, culms 2-3 tall, erect, simple, often 

 slender, smooth. Sheaths usually shorter than 

 the internodes, glabrous; ligule very short; 

 leaves s'-ic/ long, i // -2 // wide, flat or involute, 

 rough; spike 3 / -7 / in length, usually narrow 

 and slender; spikelets 3-5-flowered; empty 

 scales 4 // -6 // long, acuminate or short-awned, 

 3-5-nerved, scarious on the margins; flowering 

 scales 5"-6" long, 5-nerved, awn-pointed or 

 short-awned, scarious on the margins, often 

 rough toward the apex. 



In dry soil, Manitoba and Minnesota to British 

 Columbia, south to Nebraska, Colorado and Cali- 

 fornia. Reported from the Northeast Territory. 



July-Aug. 



