54 



Type collected by Douglas "on the Columbia River, St. Louis'." The reference to 

 8t. Louis is evidently either an error or else refers to some locality on the 

 Columbia not at present recognized in our atlases. 



General distribution: Arizona and Colorado to Alberta and west to the Pacific. 



Specimens examined. — Arizona: (Dr. E. Palmer in 1869; 535 in 1876); Grand Can- 

 yon, (D. T. McDougal 181); Tucson (J. W. Tourney 752^). Colorado: (C. S. 

 Crandall 523). Wf/omltuj : Sundance (T. A. Williams 2611, 2612, and Griffiths 

 434, 911); Meeteetse Creek (T. A. Williams 2904); Bear Lodge (Williams 

 2655a); Little Laramie River (Williams 2322, 2230, and Aven Nelson 3333); 

 Powder River (T. A. Williams 2799); Spring Creek (T. A. Williams 2813J, 

 J. N. Rose 698); Sherman (G. W. Letterman 81); Parkman (Aven Nelson 

 2457); Sheridan (L. H. Pammel 1897); Hewlett (D. Griffiths 932); Beulah 

 (Griffiths 970); Little Missouri Buttes (D. Griffiths 585); Medicine Bow River 

 (A. Nelson 4073). Yellowfttone National Park: Soda Butte (F. Tweedy 586). 

 Mo7itana: Bozeman (C. L. Shear 449, P. A. Rydberg 3006, 3000); Lima (C. L. 

 Shear 569, P. A. Rydberg 2314); Mystic Lake (P. A. Rydberg 2247); Boulder 

 Creek (F. Lamson-Scribner 4); Castle (P. A. Rydberg 3252, 3259); Spanish 

 Creek Basin (P. A. Rydberg 3109, T. A. Williams 2007, 2039); Dry Fork Belt 

 Creek (P. A. Rydberg 3355 ) ; Deer Lodge (P. A. Rydberg 2119, C. L. Shear 378); 

 Manhattan (C. L. Shear 415); Columbia Falls (R. S. Williams 604). Alherfa : 

 St. Mary's River (J. Macoun 13038). Britisli Coluinhia : Lower Frazer River, 

 49° north latitude (Dr. Lyall in 1859). Idaho: Nez Perces County (Sand- 

 berg, Heller, and McDougal 331); Hatwai Creek (L. F. Henderson 2828). 

 Waffhinglon: (Sandberg & Leiberg 450); Pullman County (A. D. E. Elmer 253); 

 Yakima (A. B. Leckenby 1898); Blue Mountains (C. V. Piper 2565); Columbia 

 River, Klickitat County (W. N. Suksdorf 174); Waitsburg (R. M. Horner 568); 

 Walla Walla (C. L. Shear 1593). Oregon: Elgin (C. L. Shear 1734); east side 

 Harney Valley (J. B. Leiberg 2370); above Wallowa Lake (C. L. Shear 1803); 

 Gearhart (C. L. Shear 1695, W. C. Cusick 650a). Nerada : Diamond Mountains 

 (S. Watson 1327); Virginia Mountains (S. Watson 1326); Reno (S. M. Tracy 

 224). California: (J. G. Lemmon 1875); San Francisco (F. Lamson-Scribner 

 in 1899); Mission Hills (Michener and Bioletti 123). 



The original description of the above species, which is quoted in full l)elow, applies 

 so well to the specimens referred to, that taken in connection with some other 

 circumstances, we feel little hesitation in taking it up. So fai" as we know, it has 

 not Ijefore been recognized, except by Fournier (Mex. PI. 2: 127) , who seems to 

 have somewhat misinterpreted it. 



The plant has been generally referred to Bromus breviari status (Hook.) Buckl. 1. c. 

 It is the same as the specimen of Bromus jiaiiciforus Nutt. in Herb. Acad. Nat. 

 Sci. Phil., upon which B. hreriaristitfns Bui;kl. was founded. Hooker appears 

 to have included it in his Ceratochloa hreviaristata, as there is a spikelet of it in the 

 Gray Herbarium, which Dr. Gray has marked "original spec." The distribution 

 of this plant by Hooker under the name hreviaristata led Torrey, Gray, and 

 Thurber to a misinteri)retation of the species, for as already mentioned under 

 B. n7iiolo'ides, Hooker's drawing and type clearly belong to that species. 



.We have been unable as yet to locate Nees's type specimen; but the fact that Hooker 

 distributed this plant from Douglas's collection, taken in connection with the fact 

 as shown in a season's work in the region of the Columbia that this species and 

 its varieties are the most common bromes met with, there is left little doubt that 

 we have the i:)lant Nees described. 



This species is quite variable. Toward the north it jjasses into B. aleuteusls Trin., 

 and southward into B. polyanthus, while near the Pacific coast it passes through 

 var. latior into B. cdritiatus. 



