41 



TTunil.oldt :\ronntains, altitude 1,520 meters (Watson 1290 in part), 1867. British 

 Columbia: Home Lalii', \'aucouver Island (Maconn 17S(i!t II. G. S. C), 1887; 

 Kicking Horse Lake, altitndo 1,.520 meters (Maconn 8, 22, 17:S!I8 II. G. S. C), 1890; 

 Ainsworth, Kootanie Lake, altitude 8.-)0 meters (Maconn 23), 1890; Rogers Pass, 

 Helkirk :\Ionutains, altitude 1,368 meters (Ma<oun 17368 H. (;. S. C.), 1890. Wash- 

 ington: Falcon Valley (Suksdorf 187, 188), 1885; Spokane County (Suksdorf 106), 

 1884; Spangle, Spokane County (Suksdorf 1099, 1100), 1884-89; (Hrandegee 1170), 

 1883; Douglas County (Saiull)erg and Leiberg 325), 1893. Orctjon : Union County 

 (Cusick 1036), 1883; Steins Mountain (Howell), 1885; Otis Creek, Malheur( 'ounty, 

 altitude 1,100 meters (T.eiUerg 2331), 1896. California: (Lemmon). 

 More widely distributed tliau the tyi)e and usually giowiiig at lower elevations. 

 Eastward, iutergradatious with C. iiwipanna occur. From C. incjjiauna, how- 

 ever, it is usually separable by its more ca'S])itose habit, stouter and juore rigid 

 culms, shorter, proportionately denser and more glomerate panicle and often 

 liroadei- and less pointed eiupty glumes. It is an exceedingly variable form, and 

 difhcult to define with any degree of satisfaction. 



CALAMAGROSTIS HYPERBOREA AMERICANA (Vasey) Kearney, n. 

 comb. Ih'tjeiuia nctjlccta amiricana Vasey, Maconn Cat. ('an., I'l. 4: 206 (18S8). 

 Calamagrosiis stricta A. Gray, Proc. Am. Acad. 6: 79 (1866), in ]):irt, iu>t Koel. 

 C. americana Sc'i-ibn. Bull. Div. Agrost. U. S. Depart. Agric. 5 : 27 (1897). 



Panicle usually very dense, spikelets smaller. 3 to 3.5 mm. long, em])ty glumes 

 usually merely acute. 



Hudson Bay region to British Columbia, south in the mountains to New Englano, 

 Colorado, and Oregon. 



Type specimen collected on gravel bars at Donald, Coliimbi.i \alley, I?ritis]i Colum- 

 bia, by John Maconn (52), July 8, 1885. 



Specimens examined. — Northeast territory: East Main Kiver, (K'oss 1737() 11. (!. S. 

 C), 1892. Vermont: Willoughby Lake, (H. Mann), 1863; Willoughby Moun- 

 tain, (C. E. Faxon, Grout and Eggleston) ; Mount Mansfic^ld, fPringle), 1876. 

 Saslcatehcivan : Bear Lake, (Bourgean 119); Prince Albert, (Maconn 13104 G. S. 

 C), 1896. Assinihoia: Crane Lake, (Macoun 7484 H. G. S. ('.), 1891; Cypress 

 Hills, (Macoun 13106 H. G. S. C), 1895. Montana: Rock Creek, (Scribner 361), 

 1883; Belt Mountains, (Scribner 360), 1883; Bozeman, (Tweedy 1020), 1886; 

 Lima, (Rydberg 2319), 1895. Wijoming : Fo.ssil Station, (Letteinum 132), 1885. 

 Colorada: (Patterson), 1892; Breckenridge, Summit County, altitude 2,888 

 meters, (Clements 390), 1896. Utah: Evanston, altitude 1,824 meters, (Watson 

 1290), 1869. Alhcrta : Banff, altitude 1,426 meters, (Macoun 21) 1891; Devils 

 Head Lake, altitude 1,456 meters, (Macoun 22), 1891; Benton Trail, (Maconn 

 13105 G. S. C), 1895. Hritish Columhia: Donald, (Maconn .52), 1885, type of 

 C.neglecta americana Yasej; Rogers Pass, summit Selkirk Mountains, altitude 

 1,369 meters, (Maconn), 1890. Oregon: Southeastern Oregon, (W. Gabb), 1864; 

 Klamath Valley, altitude 1,276 meters, (Cronkhite), 1864. 



The type specimen represents the extreme foriu with very many-!l(>w(;r<Ml i>anicle, 

 small spikelets (only 3 mm. long), and thinner and smoother empty gluim-s. 

 Specimens from the mountains of Vermont, approach it most nearly in the char- 

 acters of the spikelets. Size of spikelets is a very nnridiable character in this 

 species, however, as they sometimes vary from 3 to 4 mm. in length in the saiiui 

 panicle. Small specimens with rather broad and thick, mendy acute empty 

 glumes and small very dense, oblong panicles (Macoun 21c, Kootanie Lake, 

 British Columbia), approach C. rrassi g I nmis Tlmrh. 



38. Calamagrostis crassiglumis Thurb.; S. Wats. P.ot. Calif. 2:281 (1880). 

 Deyeiixia crassiglumis Vasey Descr. Cat. Grasses U. S. 50 (1885). C. negUicta 

 ci-assighimis Beal Grasses X. Aim. 2 : 3.53 (1896). 



Vancouver Island to California. 



