no MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



Along streams in the prairie and plain region, seldom growing 

 above an altitude of looo m. 



Montana: Great Falls, 1886, R. S. Williams^ ^22. 



* Salix lasiandra Benth. PI. Hartw. 355 [Bot. Cal. 2: 84]. 



At an altitude of about 2500 m. 



Yellowstone Park : Junction of East Fork and Soda Butte 

 Creek, 1885, Tweedy, ^84. 



Salix fluviatilis Xutt. Sylva, i : 73 [111. Fl. i : 497] ; Salix longifolia 



Muhl. Neue Schrift'. Ges. Xat. Fr. Berl. 4: 238 [Man. R. 



M. 335 ; Bot. Cal. 2 : 84] ; not Lam. 



Along streams, up to an altitude of 2000 m. 



Montana: Park Co., 1889, Tzcecdx : Highwood Caiion, 1888, 

 R. S. Williavis, 8oj ; Bozeman, 1885, Tivccdy, 4S6: Jocko River, 

 1883, Canby, 28^. 



Yellowstone Park: Mammoth Hot Springs, 1885, Tweedy, 

 482. 



Salix cordata Muhl. Neue Schrift. Ges. Nat. Fr. Berlin, 4: 236 

 [Man. R. M. 335 ; 111. Fl. i : 503 : Bot. Cal. 2 : 85]. 

 In wet places, up to an altitude of perhaps 1500 m. 

 Montana: Sun River, 1883, Scribner, 2j8 ; Swimming Women 



Creek, 1882, Can by. 



Salix Mackenziana Barrett; Hook. Fl. Bor. Am. 2: 149 under 

 Salix cordata Jfacke)izia)ia Hook. [Man. R. M. 335 ; 111. Fl. i : 

 503; Bot. Cal. 2: 86]. 



In the mountains, at an altitude of 2000-3000 m. 

 ]\Iontana: Boulder River, 1888, Tzcccdx, 6j. 

 Yellowstone Park: ]Mt. Evarts, 1885, Tweedy, 480. 



* Salix lutea Nutt. Sylva, i : 6^^, pi. ig ; Salix cordata In tea Bebb, 



Gard. & For. 8 : 473. 



Characterized by its smooth bright yellow branches. 



Montana: Highwood Canon, 1888, R. S. ]ViIIia)us, 6yj. 



Salix curtiflora And. Ofvers. Vet. Akad. Forh. 15: 130; Salix 



Novae- Angliae psendocordata Anderson, Mon. Sal. 161 [Man. 



R. M. 336^]. 



As far as the specimen cited below is concerned, it is evidently dis- 

 tinct from S. Novae-Angliae . This specimen was determined by 

 Mr. Bebb. 



Montana: Nevada Creek, 1883, Canby, 283. 



