438 GEOLOGICAL SURVEY OF CANADA. 



From Lat. 4J>° to Sitka in tho coast rant!;os and islands along the coast. 

 (Sarijent.) Pyi-anud llarboi-, Alaska. (Rothr. AlasL) 



(1^84.) A. rhombifolia, Xuttall. >r()untain Alder. 



Tho range of this species ami the proceding are still obscure and 

 furtlier examination is necessary before their limits can be fixed. 

 Common in the Colinnbia valley and valleys of the Selkirks, B.C. 

 {Macoun.) Along brooks in the Fraser River valle}^, B.C. (Dawson.) 

 Valley of the Fraser and southwai-d, B.C. (Sargent.) 



(1985.) A. incana, Willd. Common Alder. 



A. glauca, Michx. N. American Sylva. I., 378, 1819. 

 A. incana, var. glauca, Gray, jVIuu. 1. Ed., 423. 



A. siTndata, Cat. Holmes Herb, 17. 



Abundant from Newfoundland throughout Canada. Along small 

 streams and in river valleys to the base of the Eocky Mountains, and 

 southwards to Lat. 49\ Eastern Bi-itish America within the arctic 

 circle. (Hook. Arct. PI.) 



Tar. virescens, Watson, Bot. Cal. II., 81. 



B. incana, var. glauca, Macoun, Geol. Rep. Can., 210, 1875-76. 



Abundant on the higher slopes of the Rocky Mountains from Kick- 

 ing Horse Lake Avestward through the Selkirks, at an altitude of 6000 

 feet. (Macoun.) Rocky spring, West Butte, Lat. 49°. (Dawson.) 



(1986.) A. viridis, DC. Green Alder. 



A. undulata, Willd. Cat. Holmes Herb, 17. 

 A. crispa, Pursh, Fl. I., 623 ; Hook. Fl. II., 157. 

 A. glutinosa, Eich. App., page 36. 

 Betula Alnus crispa, Michx. Fl. II., 181. 



A common shrub from Labrador and Newfoundland westward across 

 the continent to the Pacific and northward in the barren grounds. 

 Ford's Harbor, Labrador. (B. Bell.) Common in the eastern pro- 

 vinces, Quebec, and northern Ontario. It is found north of Lake 

 Superior and around Lake Nipigon, appearing at Edmonton and north- 

 ern British Columbia, where it covers large ti*acts in the burat pine 

 woods. (Mar-oun.) Sitka, Ounalashka, Norton Sound, Kotzebue Sound 

 and northern coast, also Youcon River. (Rothr. Alask.) Greenland 

 and within the arctic circle. (Hook. Arct. PI.) 



