19 



(Sheldon 607) ; Beaver Creek, Laramie County, altitude 3,344 meters (Pammel), 

 1896; Buenavista, Chaffee County, altitude 3,040 to 3,192 meters (Clements 

 309; Shear 1016), 1896. Alberta: Sheep Mountains (Macoun, 13113, G. S. C); 

 Morley (Macoun), 1885. Idaho: (Wheeler Expedition 798, in part), 1871. Utah: 

 (Ward) 1875. Nevada: Humboldt Mountains, altitude 3,040 meters (Watson 

 1291). Alaska: (McDonald), 1864; along Yukon River (Funston), 1893. North- 

 west Territory: Tagish Lake, latitude 62- (Dawson), 1887; Lewis River (Daw- 

 son), 1887; Fort Felly Banks (Dawson), 1887; Bennetts Lake (Ogilvie), 1887. 

 British Columbia: Donald (Macoun), 1885; Kicking Horse Lake (Macoun), 1885; 

 Dense River (Dawson), 1887. JVashiiKjfoti: Wenatchie region (Tweedy 650), 1883; 

 Mount Stuart, altitude 2,280 to 2,432 meters (Saudberg and Leiberg 825), 1893. 

 Oregon: Baker City (Nevius), 1873. California: Redwoods (Bolander); Mount 

 Dana, altitude 3,748 meters (Bolander 5071). 



C. purpurascens has been confused by some authors with the s-ery distinct C. sylra- 

 tica (Schrad.) D. C. of Europe, which is a taller, less cicspitose grass with broad, 

 flat, lax, leaf-blades; longer and looser panicle; and broader, less pointed, 

 thinner, and nearly glabrous empty glumes. 



CALAMAGROSTIS PURPURASCENS ARCTICA (Vasey) Kearney, n. comb. 

 C. Arctica Vasey, 111. N. Am. Grasses 2 : Ft. 2, No. 55 (1892). 



Depauperate, perfectly smooth and glabrous up to the iutiorescence. Culms ascend- 

 ing, 18 cm. or less in length. Leaf-blades short, the longest 7 cm. long, compara- 

 tively broad. Panicle 2 to 3 cm. long, barely 1 cm. wide. Spikelets about 5 mm. 

 long. Awn short, about 7 mm. long. 



Type specimen in the United States National Herbarium, collected on St. Faul 

 Island, Fribilof Islands, by James M. Macoun (38), July 31, 1891. 



8. Calamagrostis vaseyiBeal, Grasses N. Am. 2: 344(1896). C.purpurascensYasej, 



Monog. Grasses U. S., Contr. 11. S. Nat. Herb. 3: 83 (1892), not R.Br. 



Mountains of Washington and Oregon.' 



Type specimen collected in the Cascade Mountains, Washington, by G. R. Vasey, in 

 1889. 



Specimens examined. — Washington : Cascade Mountains (G. R. Vasey), 1889; Goat 

 Mountains (O. D. Allen 177), 1896; Skamania County (Suksdorf, 201, 909^ 1025), 

 1886-1890; South Olympia Mountains, altitude 1,368 meters (Henderson 1855), 

 1890; (Brandegee 177), 1882. Oregon: Siskiyou Mountains (Howell), 1887. 



Imtermediate between C. purpurascens and C. howdlii, the type specimens with 

 shorter awns and denser panicles being nearer the former. From C. purpurascens 

 it differs in being very strongly ctesjiitose from a hard, knotted rootstock, with 

 less rigid and more slender culms; marcescent basal sheaths very short and less 

 closely enveloping the culm; panicle usually looser, fewer flowered, broader, 

 less colored, with longer, straighter, more slender, and less scabrous branches; 

 thinner and smoother, less strongly keeled empty glumes; usually much longer 

 and more slender awn attached higher; and longer callus hairs. From C. howeJlii 

 it differs in its shorter, flatter, and more rigid leaf-blades; and contracted, 

 usually purplish panicle. The spikelets are much like those of the European 

 C. sylvatica, bnt in other respects the i>lant is quite different. 



\i Not ca'spitose, soft in texture, leaf-blades flat. 



9. Calamagrostis tweedyi Scribuer; Vasey, Monog. Grasses U. S., Contr. U. S. Nat. 



Herb. 3: 83 (1892). Deyeuxia tweedyi Scribn., Bull. Torr. Club 10: 64 (1883). 

 Type specimen collected in the Cascade Mountains, Washington, by Frank Tweedy. 

 Specimens examined. — Washington : Cascade Mountains (G. R. Vasey), 1889. 

 A unique species with no near ally. 



1 Northward to Alaska according to Beal, but this is probably a mistake. 



