MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 189 



In the valleys and canons, up to an altitude of 2500 m. 



Montana: Little Belt Mts., Flodman, ^04; Cliff Lake, July 

 27, 1897, Rydberg & Bcssey, 4231; Rochester Creek, 1888, F. 

 Tzveedy, 112; Helena, 1887, 1890 and 1891, Kelsey ; 1882, Canby. 

 Erysimum inconspicuum (Wats.) MacM. Met. Minn. 268 [111. Fl. 



2: 151]; Erysimum -paj'Tiforiun Nutt. ; Torr. & Gray, Fl. N. 



Am. I : 95. 1838 [S}^. Fl. i^ : 143 ; Man. R. M. 22] ; not Pers. 



1807 ; Erysimum asperum inconsficmim Wats. ; King's Exp. 5 : 



24; Cheiranthus inconspiciius Greene, Pittonia, 3: 134. 



River banks and sandy places, at an altitude of 1000-2500 m. 



Montana : Little Belt Mts., 1896, Elodman, joj ,' Clarke's Caiion, 

 1888, E. Tweedy, 32; Great Falls, 1888, R. S. Williams, 738; 

 Lewis and Clarke Co., Mrs. Muth ; Custer Co., 1892, Mrs. Light. 



Yellowstone Park : Slough Creek, 1885, Tzueedy, ^yo. 

 Erysimum pumilum Nutt. ; Torr. & Gray, Fl. N. Am. i : 95 [Man. 



R. M. 22]; Cheiranthus pumilus Yiovnem. Hort. Hoffm. 2: 613; 



Cheiranthus asperriuius Greene, Pittonia, 3: 133. 



In Coulter's Manual it is described as only 2-4 inches high. It 

 is generally much taller, often as tall as C. asper, from which it 

 differs in the somewhat smaller and lighter 3'ellow flowers and the 

 almost erect pods, which are very slender and often curved and 

 twisted. 



Montana: Madison Co., 1888, Tzueedy, 11 j; Shields River, 

 1883, Scribner, 80. 

 Erysimum asperum DC. Syst. 2: 505 [Syn. Fl. 143 ; Man. R. M. 



22; 111. Fl. 2: 152] ; Cheiranthus asper Nutt. Gen. 2: 69 [Bot. 



Cal. 1:35]. 



On dry hills, up to an altitude of 2500 m. 



Montana: Spanish Basin, 1896, Elodman, 307; Madison Co., 

 1888, E. Tzveedy, 117; Bridger Mts., June 11 and 17, 1897, Ryd- 

 berg d- Bessey, 4232, 4236 and 423 7; Pony, July 6, 4234; Emigrant 

 Gulch, 4233; East Boulder, 1887, Tweedy, 23; Grafton, 1892, R. 

 S. Wtlltams, 31 ; Madison Co., Mrs. Elora McXulty ; Bozeman, 

 1892, W. T. Shaw. 



Idaho : Mt. Chauvet, July 27, 1897, Rydberg d- Bessey, 4233. 

 (?) Erysimum occidentale Robinson; Gray, Syn. Fl. i' : 144; Chei- 

 ranthus occidentalis Wats. Proc. Am. Acad. 23: 261. 



Rare ; only one specimen seen, which is doubtfully referred to this 

 species. 



Montana: Bridger Mts., 1896, Elodman, 306. 



