254 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



It IS very unlike the species in general habit, but there are no dif- 

 ferences in the flowers or fruit. It was found at an altitude of 3300 m. 

 Montana: Haystack Peak, Park Co., 1887, Tzveedy, 120. 



Aragallus lagopus (Nutt.) Greene, Pittonia, 3: 212; Oxytropis Id- 

 gopus Nutt. Journ. Acad. Phila. 7: 17 [Man. R. M. 70]. 

 Dry hills, at an altitude of 1500-2000 m. 

 Montana: Head of Missouri, Wyeth; Big Blackfoot River, 



Jo/inPearsall, 8g2 (Lt. J. Mullan's Exped. ) ; Dear Lodge, 1888, F. 

 W. Traphagcn ; Lima, 1895, Rydbcrg^ -/ij^ Bridger Mountains, 



June II, 1897, Rydberg & Besscy, 44gg and 4302; Helena, 1887, 



F. W. Anderson ; Bozeman, 1893, W. T. S/iaw; Mrs. Alderson; 



Great Falls, 1885, R. S. Williams, Jjj: Bozeman Pass, 1883, 



Candy, go. 



Aragallus nanus (Nutt.) Greene, Pittonia, 3: 212; Oxytropis nana 



Nutt. ; Torr. & Gray, Fl. N. Am. i : 340 [Man. R. M. 70]. 



On dry hills and plains, at an altitude of 1500-2500 m. 



Montana: Madison Co., 1888, F. Tzfcedy, jog; Lima, 1895, 

 Rydberg, 2^14; Melrose, 2yij; Spanish Peaks, 1896, Flodman, 

 648; Deer Lodge, 1892, F. D. Kchey ; Red Rock Creek, 1880, 

 Watson, g4. 



Yellowstone Park: 1873, C. C. Parrx, gi. 



* Aragallus collinus A. Nelson, Erythea, 7: 57. 



The following specimens I take to belong to this species, but they 

 differ from Professor Nelson's description in the color of the flowers 

 and in the size of the leaflets. The color of the flowers is, so far 

 as I know, always purplish blue, fading in age to whitish or yellow, 

 and the leaflets are seldom over i cm. long. 



Related to A. Besseyi, A. lagopus and A. nanus. From the first 

 it is distinguished by the fewer and somewhat smaller flowers, the 

 broader calyx-lobes and bracts, the shorter wings, which are less 

 deeply lobed, the broader standard and the structure of the pod. 

 From A. nanus it differs in the longer erect strict scape, the spike, 

 which in fruit is often more elongated, and in the more numerous 

 leaflets. It, perhaps, most resembles A. lagopus, from which it is 

 readily distinguished by the appressed pubescence of the scape. It 

 is not uncommon on dry hillsides, at an altitude of 1800-2700 m. 



Montana: Spanish Basin, June 26, 1897, Rydberg & Bessey, 

 ^500; June 23, 44g8 ; 1896, Flodman, 64g: Mill Creek, 1887, Tweedy, 

 121 ; Melrose, 1888, Tweedy, iioa; Gardiner, 1885, jj/. 



