256 GEOLOGICAL SUBYET OF CANADA. 



(1194.) A. Canadensis, Michx. 



A. campestris, Pursh Fl. II-, 521. 



A. desertorum, Hook. Fl. I., 325, in part. 



Along sea beaches and on lake shores and by rivers throughout 

 Canada. On gravelly ridges and sand dunes on the prairies and open 

 plains and through the Eocky Mountains extending to the Pacific 

 Coast. (^Macoun.) From Hudson Bay across the wooded country 

 northward to the Arctic Circle and west to the Pacific. (JTooker.) 



(1195.) A. caudata, Michx. 



Half Way Island, Detroit Eiver, Ont. (^Maclagan.) On dr}' exposed 

 ridges western plains. On gravel ridgo west of Fort EUice, Man. 

 {Macoun.') 



(1196.) A. cana, Pui-sh. Sage Brush. 



Plains of the Saskatchewan. (Drummond.) From the confluence 

 of the Assiniboine and Qu'Appellc on arid clay or dry sand south- 

 westwardly across the j)lains. Common westward from Old Wives 

 Lakes to Calgary, and south to the 49th parallel. {2facoun.) 



(1197.) A. tridentata, Nutt. 



On very arid soil. Where this plant gi-ows the soil needs irrigation. 

 It is altogether unknown north of the 49(li parallel, east of the Rock}' 

 Mountains. (Macoun.) Flathead Eiver, B.C. (Dawson.) 



(1198.) A. triflda, Nult. 



On very arid soil from, Spence's Bridge to Cache Creek, interior of 

 British Columbia. (Hill & Fletcher.) Along the shore of Osoyoos 

 Lake, B.C. (Dawson.) 



(1199.) A. longifolia, ISTutt. 



On arid clay banks of Eibstone and Stoney creeks, east of Hand 

 Hills, also at Old Wives Lakes and north of Cypress Hills, apparently 

 rare, but possibh* overlooked. (Macoun.) 



(1200.) A. discolor, Dougl. 



A. Ludoriciana, Bess. Hook. Fl. I., 322. 



Eocky j\Iountains, and Arctic America. (Richardson.) Bow Eiver 

 Pass, Eocky Mountains. (Macoun.) South Kootanie Pass, 49th paral- 

 lel ; Nicola Valley, B.C. (Dawson.) On rocky banks at Yale, B.C. 

 (Macoun.) Spence's Bridge, B.C. (Fletcher <i- Hill.) 



