96 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



Tzvcedy, 86: Grand Canon, 1889, J^. IV. Dczvart ; Yellowstone 

 Lake, 187 1, Hay den ; 1873, C. C. Parry, 26g. 



* Allium librosum Rydb. Bull. Torr. Bot. Club, 24: 188. 



This most i-esembles A. Canadcusc, but is distinguished by the 

 slender habit, the bright red bulblets and the crest of the ovar}-. 

 From A. reticulatum and A. Gcycri it is separated by the presence of 

 bulblets. Mountain sides and valle3-s at an altitude of 2000-3000 m. 



Montana: Lima, June 29, 1895, Rydberg; 2606: Beaver Head 

 Co., 1888, P. Tweedy, loi ; Spanish Basin, June 30, 1897, Rydberg 

 & Bessey, jSjg; Blackfoot River, 1883, Canby, jig; Bozeman 

 Pass, 1893, Canby, Jig. 



Yellowstone Park : East Fork, 1885, Tzceedy, ^gg. 



Allium Nuttallii Wats. Proc. Am. Acad. 14: 227 [Man. R. M. 

 348; 111. Fl. i: 414]. 



Dry hillsides and prairies up to an altitude of 2500 m. 

 Montana: Dillon, 1895, Rydberg, 260 j. 

 Yellowstone Park : 1888, Rev. Dr. C/ias. H. Hall. 



Allium reticulatum Fraser ; Hook. Fl. Bor. Am. 2 : 184 [Man. R. ]M. 



348; Wats. Rev. 227]. 



Dry places at an altitude of 1000-2000 m. 



Montana: Madison River, 1883, Scribner, 2jS : Big Blackfoot 

 River and Bozeman Pass, 1883, Canby,' j 18 ; Bannock City, 1880, 

 lValso)i . 



* Allium Geyeri Wats. Proc. Am. Acad. 14: 227. 



Stouter and taller than the prec eding : perianth-segments acuminate, 

 strongly nerved and rigid in fruit. Dry valleys up to an altitude of 

 2000 m. 



Montana : Fort Benton, yc?//// Pearsall, ioj6; Cottonwood Creek, 

 1892, W. T. Shavj; Madison Co., Mrs, McNulty : Great Falls, 

 1885, ^- ■5- Williains, 280; Shields River, 1883, Scribner, 2-jg. 

 Allium Tolmiei Baker, Bot. Mag. 6227 [Man. R. M. 349; Wats. 



Rev. 234]. 



At an altitude of 2700 m. 



Yellowstone Park : 1885, Tzceedy, ^g8. 



* Allium collinura Dougl. ; Wats. Proc. Am. Acad. 14: 228. 



It is characterized by the non-fibrous bulb, the outer scales of which 

 are more or less reticulated, the low scape, the ovate-lanceolate, acute 

 perianth-segments, which are twice as long as the stamens and style, 

 and the capsule slightly ridged at the summit. 



