33 



General distribution: Arizona and New Mexico, north in the mountains to British 

 America. 

 Specimens Examined. — Arizona: Chiricahua Mountains (J. W. Tourney 31); Tuc- 

 son (J. W. Tourney 752); San Francisco Mountains (J. G. Leinmon 3194); Rin- 

 coii Mountains (G. C. Nealley 88). New Mexico: (Dr. G. Vasey); White 

 IMountains (E. 0. AVooton 332). Utah: Provo (S. M. Tracy 404); Aquarius 

 Plateau (L. F. Ward 431); Mount Ellen (M. E. Jones 5684 bf); Alta (M. E. 

 Jones 1132). Colorado: Georgetown (P. A. Rydberg 2381 ; C. L. Shear 610, 624|; 

 S. M. Tracy 457) ; :\Iarshall Pass (F. E. Clements 216; C. L. Shear 918) ; Brecken- 

 ridge (C. L. Shear 1078); 

 Sheep Horn Divide (Shear 

 & Bessey 1541, 1539, 1548); 

 Grand Lake (Shear & Bes- 

 sey 1522); Durango (F. 

 Tweedy 389); Ouray (C.L. 

 Shear 1153); Buffalo Pass 

 (Shear & Bessey 1433); Red 

 Mountain (C. L.'shearl204) ; 

 W^est Mancos (Tracy, Earle 

 & Baker 332); Dix (Tracy, 

 Earle & Baker 4298) ; Upper 

 La Plata (Tracy, Earle & 

 Baker 987, 4303); Silver 

 Plume (P. A. Rydberg 2466; 

 C. L. Shear 679," 711 ) ; Buck- 

 eye canyon (G. H. French) ; 

 Glen wood Springs (Shear & 

 Bessey 1301); Robinson (C. 

 L. Shear 1050); Red Cliff 

 (Shear & Bessey 1281, 1284; 

 Patterson 30); Florissant (T. 

 A. Williams 2207); Pikes 

 Peak (T. A. Williams 2222, 

 2173; Crandall & Co wen 

 542); Manitou (C. L. Shear 

 761); Cameron Pass (C. S. 

 Crandall 116); McCoys 

 (Shear& Bessey 1334); Villa 

 Grove (C. L. ' Shear 877). 

 Wiioming: Welcome (T. A. 

 Williams 2668, 2673a); La 

 Plata Mines (E. Nelson 

 5087); Sheep Mountain (T. 

 A. WiUiams 2305); Cooper 

 Hill (A. Nelson 4407); Bat- 

 tle Lake (A. Nelson 4022) 

 Yelloicdone National Park: 



Fig. 17.— Broiiiiis rirhanUoni : a, empty glunius with two 

 florets; h, dorsal view of a flowering glume. 



Cement Creek, Big Horn Co. (F. Tweedy 67). 



Near Mammoth Hot Springs ( F. H. Burgelhaus). 

 Montana: Belt Mountains (F. L. Scribner 411); Hound Creek (F. L. Scrib- 

 ner 14). 

 Through the kindness of Dr. I. Urban we have been able to examine a part of the 

 type of this species which has not heretofore been recognized by American 

 botanists no far as we know. This species includes the great Ijulk of the mate- 

 rial from the Rocky Mountains hitherto referred to B. ciliutut<, into which it 

 20796— No. 23 3 



