438 GEOLOGICAL SURVEY OF CANADA. 



From Lat. 49° to Sitka in the coast ranges and islands along the coast. 

 (^Sargent.) Pyramid Harbor, Alaska. {Rothr. Alask.) 



(1984.) A. rhombifolia, Nuttall. Mountain Alder. 



The range of this species and the preceding are still obscure and 

 further examination is necessary before their limits can be fixed. 

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

 (Macoun.) Along brooks in the Eraser River valley, B. C. (Dawson.') 

 Valley of the Eraser and southward, B.C. (Sargent.) 



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



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

 A. incana, var. glauca, Gray, Man. I. Ed., 423. 



A. semilata, Cat. Holmes Herb, 17. 



Abundant from Newfoundland throughout Canada. Along small 

 s treams and in river valleys to the base of the Eocky Mountains, and 

 southwards to Lat. 49°. Eastern British America within the arctic 

 circle. (Hook. Arct. PI.) 



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



B. incana, var. glauca, Macoun, Geo! Eep. Can., 210, 1875-76. 



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

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

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



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



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

 A. crispa, Pureh, FI. I., 623 ; Hook. Fl. 11., 157: 

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

 BetvlaAlnus erispa, Michx. Fl. XL, 181. 



A common shrub from Labrador and Newfoundland westward across 

 the continent to the Pacific and northward in the ban-en grounds. 

 Eord's Harbor, Labrador. (R. Bell.) Common in the eastern pro- 

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

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

 ern British Columbia, where it covers large tracts in the burnt pine 

 woods. (Macoun.) Sitka, Ounalashka, Noi-ton Sound, Kotzebue Sound 

 and northei-n coast, also Toucon Eiver. (Rothr. Alask.) Greenland 

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



