30 



Sheaths rarely inconspicuously bearded at junction with the l)lade; blade usually 

 short scabrous-pubescent on the upper (rarely both) surfaces ; panicle commonly 

 rather small, more llexuous, more densely flowered, usually dark purple; spike- 

 lets larger (3.5 to 4 mm. long) ; enijjty glumes comparatively narrower, sharp 

 attenuate-acuminate, sometimes subfalcate, somewhat thicker, usually much 

 more seaVtrous (occasionally almost strigose) ; awn longer, often considerably 

 (sometimes 0.5 mm.) exceeding the flowering glume. 



This variety represents a transition from C. canadensis to C. Jangsdorffii. The 

 extreme form can be distinguisheil from the latter species only by its smaller 

 spikelets and usually shorter awn and less scabrous empty glumes. It is most 

 abundant in the Kocky Mountain region, where it largely replaces the typical 

 forms of both the related species. 



Labrador and Newfoundland; high mountains of North Carolina; Keewatiu to 

 Alaska, south in the mountains to New Mexico and California. 



Type specimen collected in Californi.i by H. N. Bolander (60S7), 1866. 



Specimens examined. — Labrador: Esquimaux River, (J. A. Allen 19), 1882. Neio- 

 foiindlaiid: (Waghorne 31). 1896. Xortlt Carolina: Roan Mountain, (Scribner), 

 1S89. Kccwatin : Severn River, (.1. M. Macoun 17352 H. (}. S. C. ), 1886. Aihahasca : 

 (Macoun 116), 1872. Assiniboia : Moose Jaw, (Macoun 56), 1880. Montana: Deep 

 Creek, altitude 1,368 meters, (Scribner 358), 1883; Beaver Creek, (Scribner 226), 

 1883; Lima, (Shear 553), 1895; Manhattan, (Shear 419, 421), 1895; Manhattan, 

 (Rydberg 2189), 1895; Helena, (Rydberg 2139^), 1895; East Gallatin swamps, 

 altitude 1,520 meters, (Rydberg 3202), 1896; Castle, (Rydberg 3235), 1896; Yogo 

 Gulch, altitude 1,520 meters, (Rydberg 3408), 1896; Bridger Canyon, altitude 

 1,672 meters, (Rydberg 3205), 1896; Spanish Creek, altitude 1,824 meters, (Ryd- 

 berg 3016,3024, 3049, 3073), 1896; Barker, altitude 1,.520 meters, (Rydberg 3365, 

 3366), 1896; Dry Fork Belt Creek, altitude 1,216 meters, (Rydberg 3358), 1896; 

 Belt Pass, altitude 1,976 meters, (Rydberg 3333), 1896; Spanish Creek, (T. A.Will- 

 iams 20-!7), 1896; Spanish Creek Basin, altitude 2,432 meters, (T. A.Williams 

 2057i), 1896. Yellowstone National Park: Pelican Creek, (Tweedy* 584), 1885; 

 Yellowstone River Upper Falls, (Hayden 77), 1871; (Letterman 46). 1885; Mam- 

 moth Hot Springs, altitude 1,884 meters, (Burglehaus), 1893. Wf/oming : Lincoln 

 Gulch, (Nelson 2625), 1896; (Parry 300), 1873. Colorado: Twin Lakes, Eagle 

 River, (Coulter), 1873; Twin Lakes, (Wolf 1093), 187.3, (type of C. canadensis 

 robustaYiViey); Golden City, (Greene), 1871; La Plata Mountains, (Eastwood 13), 

 1891; Steamboat Springs, Routt County, (Eastwood 21), 1891; Clear Lake, 

 Georgetown, (Rydberg 2375), 1895; Georgetown, altitude 2,888 meters, (Patterson 

 31), 1885; Georgetown, (Shear 611), 1895; Idaho Springs, (Shear 721), 1895; Buena- 

 vista, Chaflee County, altitude 3,040 meters, (Shear 1004, 1019), 1896; Veta Pass, 

 Costilla County, altitude 2,860 meters, (Shear 337), 1896; Villa Grove, Saguache 

 County, altitude 2,736 meters, (Shear 888, Clements 125), 1896; Marshall Pass, 

 Saguache County, altitude 3,280 meters, (Shear 903, Clements 225), 1896; 

 Breckeuridge, Summit County, altitude 2,888 meters, (Shear 1075), 1896; Rux- 

 ton Creek, Pikes Peak (Clements 12), 1896; Pikes Peak (T. A. Williams 2178, 

 2181; Sliear 722), 1896. Xcw Mexico: Santa Fe Creek, (Fendler 957), 1847. 

 Xortliwest Territory : Mackenzie River, (McCounell 17359 H. G. S. C), 1888. Idaho : 

 Henrys Fork, (Hayden), 1872; Lake Tesemini, Kootenai County, (Sandberg 694), 

 1892; Creur d'Alene River, Kootenai County, (Sandberg 637), 1892; Lake C(Pur 

 d'Alene, (Sandljerg .561, .578), 1892 ; Palouse Country and Lake Canir d'Alene, (G. B. 

 Aittm 37), 18;i2; Grangeville, Camas Prairie, (Henderson 2831), 1894; Beaver 

 Canyon, (Rydberg 2328), 1895; I'etit Lake, (Evermann 314), 1895; Redfish Lake, 

 altitude 2,128 meters, (Evermann 427), 1895. I'iah : Southern Utah, (Palmer 482), 

 1877. Arizona: Rincou Mountains, altitude 2,280 meters, (Xealley 70), 1891. 

 Alanka : Yukon River, (Kennicott). British Colnmbia: Eraser River, (Lyall), 

 1859; Donald, Columbia Valley, (Macoun 53, 17353 H. G. S. C), 1895; Adams 

 Lake, altitude 1,700 meters, (Dawson 17344 H. G. S. C), 1888; Vancouver Island, 



