20 



li. Jwn shorter than or not much exceeding the empty glumes. 

 '^ Spikelets strongly compressed, empty glumes sharply keeled. 

 \Flant loiv, leaf-blades almost filiform— Boeky Mountain species. 



10. Calamagrostis montanensis Sciibu.; Yasey, Monog. Grasses U. 8., Coutr. U.S. 

 Nat. Herb. 3: 82 (1892). Dcyenxia montanensis Scribu., Proc. Soc. Prom. Agric. 

 (1884) 52 (1885). 



Saskatcliewun and Alberta to South Dakota and Wyoming. 



Tvpe specimen collected on dry " bench lauds" east of Helena, Mont,, by F. Lamsou- 

 Scribner, July 2, 1883. 



Specimens y.wuis-EV.—Saskatclienan: (Bourgean), 1858. Assiniboia: Salt Lake 

 (Maconn 101), 18:9; Moose Jaw (Maconn 13102, 13110, G. S. C.^ 1896; Chaplin 

 (Maconu 13103, H. G. S. C), 1896; Cypress Hills (Macoun, 13099, G. S.C), 1895. 

 Xorth Dakota: Billings, Medora County, altitude 668 meters (Branuon 130), 1896. 

 South Dakota: Aurora County, altitude 456 meters (Wilcox 744), 1892-93; Eon- 

 dell, common from Aberdeen to Kedfield (Griffiths 129), 1896. Montana: Sixteen 

 Mile Creek, near Helena, altitude 1,.J20 meters (Scribuer 363), 1883; Grasshoi)per 

 Valley (Watson 450), lt80; Columbia Falls (R. S. Williams 846), 1894. Wyo- 

 ming: Carbon, altitude 2,064 meters (Britton), 1882; Sheridan County (Bnffum, 

 Nelson .5091), 1892. Alberta: Pot Hole Creek (Macoun 13098, G. S.C), 1895; 

 Crow Nest Pass (Dawson 17426), 1883. 



The Wyoming specimens have unusually small spikelets (4 mm. long), and in Nel- 

 son's plant the palea exceeds the flowering glume by 0.5 mm. 



ii Plant tall, leaf-blades not filiform— Pacific coast species. 



11. Calamagrostis aleutica Bong. Veg. Sitcha, Mem. Acad. St. Petersb. (VI) 2: 

 171 (1832). Deyeuxia nutkwnsis Presl Rel. Haenk, 1: 250 (1828)?. Calamagrostis 

 nutknnsis Steud. Syu. PI. Gram., 190 (1855) ?. Deyeuxia aleutica Munro ; Hook, f., 

 Trans. Linn. Soc. 23: 345 (1862). Calamagrostis albicans Buckl., Proc. Acad. 

 Phila. (1862) 92 (1863). C. pallida Nutt., A. Gray, Proc. Acad. Phila. (1862) 334 

 (1863). Deyeuxia breviaristata Vasey, Bull. Torr. Club 15: 48 (1888). 



Along the Pacific coast, Unalaska to central California. 



Type specimen collected in Unalaska by Chamisso and Escbscholtz. 



Specimens examined.— r»rt7fls7. a (Mertens); (Harrington), 1871-72; (Kellogg 111), 

 1867. Alaxka: (Applegate); (Howell); Sitka (Barclay). British Columbia: Van- 

 couver Island (J. G. Swan); Barclay Sound, Vancouver Island (Macoun 1734 

 H. G. S. C), 1887, type of Deyeuxia breviaristata Vasey. Washington: (Henderson 

 2154), 1892. Oregon : "Columbia alluvium" (Nuttall), type of C. albicans Buckl. 

 and C. pallida Nutt.; Waldo (Howell), 1882; (E. Hall 623), 1871. California: 

 Oakland, Marin County (Bolander 2274, 6084), 1866; Mendocino (Pringle), 1882; 

 Santa Cruz (Anderson). 



CALAMAGROSTIS ALEUTICA PATENS Kearney, var. n. 



Culm somewhat geniculate; leaf-blades flat; panicle ovate, about 2 dm. long and 1 

 dm. wide, open, the branches wide spreading, the primary branches finally hori- 

 zontal; spikelets about 5 mm. long; awn attached one-sixth to one-fifth above 

 the base of the glume, exceeding the glume by about 1 mm., strongly geniculate, 

 the lower part rather strongly twisted ; prolongation of the rachilla with its 

 hairs considerably exceeiling those of the palea. 



Type specimen iu the Gray Herbarium of Harvard University, collected near Mendo- 

 cino, Cal., probably by H. N. Bolander. 



12. Calamagrostis vilfccformis Kearney, new name. C densa Vasey ; Coult. Bot. 

 Gaz. 16: 147 (1891), not Deyeuxia densa Benth. C. koelerioides de:isa Bcal Grasses 

 N. Am. 2: 345(1896). 



Southern California. 



Type specinien in the United States National Herbarium, collected near Julian, San 

 Diego County, by C. li. Orcutt, iu 1889. 



