MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 273 



Nearest allied to the preceding ; differing in the ash-gray (not 

 greenish) and often pink-tinged flowers and the ciliate spines. It 

 is a rare species. 



Montana: Deer Lodge, 1891, jp. ^V. Notestein; Great Falls, 



1886, R. S. Williams, 670. 



Cactus viviparus Nutt. in Eraser's Cat. [Coult. Contr. U. S. Nat. 



Herb. 3 : 119 ; 111. Fl. 2 : 462] ; Mamillaria vivipara Haw. Syn. 



PI. Suec. Suppl. 72 [Man. R. M. 109]. 



Dry prairies and plains, up to an altitude of 1500 m. 



Montana: Jo/in Pcarsall, 801 (?); Great Falls, 1886, 7?. S. 

 Williams, ^01; Hay den, iSj^ and iSjj ; Vernon Bailey , 18 go (the 

 latter two according to Coulter). 



Opuntia polyacantha Haw. Syn. PI. Succ. Suppl. 82 [Coult. Contr. 

 U. S. Nat. Herb. 3 : 435 ; 111. Fl. 2 : 464] ; Opuntia 3fissouriensis 

 DC. Prod. 3: 472 [Man. R. M. 109]. 

 On dry plains, up to an altitude of 2000 m. 

 Montana : Hayden, 1854 ^"^ ^859 (according to Coulter). 



* Opuntia polyacantha platycarpa (Engelm.) Coulter, Contr. U. S. 



Nat. Herb. 3: 436; O. Missouricnsis platycarpa Engelm. Syn. 



Cact. 300. 



Like the species, but generally with only one long central spine 

 and a few shorter exterior ones. 



Montana: 1883, Canby, 1^0 (according to Coulter); Helena, 



1887, F. D. Kelsey ; Beaver Head, A. E. Barrett; 1854, Hayden. 



Opuntia fragilis (Nutt.) Haw. Syn. PI. Succ. Suppl. 82 [111. Fl. 2: 

 464; Man. R. M. 112 ; Contr. U. S. Nat. Herb. 3: 439] ; Cactus 

 fragilis Nutt. Gen. i : 296. 

 Dry plains and hills. 

 Montana: 1883, Canby (according to Coulter). 



ELAEAGNACEAE. 



Lepargyraea Canadensis (L.) Greene, Pittonia, 2: 122 [111. Fl. 2: 

 467] ; Elaeagnus Canadensis L. Sp. PL 1024 ; Shepherdia Cana- 

 densis Nutt. Gen. 2 : 240 [Man. R. M. 322]. 

 In woods, up to an altitude of 2500 m. 

 Montana: Helena, 1892, Kelsey; Headwater of Jocko, 1883, 



Canby, 280; Judith River, 1882, Canby; Ross' Hole, 1880, Watson. 

 Yellowstone Park: 1884, Tweedy; Electric Peak, Aug. 18, 



1897, Rydberg & Bessey, jpjr^. 



