78 MISCELLANEOUS CIRCULAR 92, U. S. DEPT. OF AGRICULTURE 



Betula papyrifera cordifolia (Kegel) Fernald. Paper Birch. 



Range. — New England (High Mountains) and northward into Labrador and 

 Newfoundland; occurring also, within the range of the species, in Wisconsin 

 (Green Bay) and Minnesota (Cook County); North Carolina (Mount Mitchell). 



NAME IN USE 



Paper Birch 



Betula papyrifera elobata (Fernald) Sargent. Paper Birch. 



Range. — Quebec (headwaters of the Ruissieau a la Neige on Mt. Albert, 

 Gaspe County. — M. L. Fernald). 



name in use 



Paper Birch 



Betula papyrifera occidentalis (Hooker) Sargent. 52 



Western Paper Birch. 



Range. — Northwestern Washington and southwestern British Columbia, 

 extending eastward in eastern Washington and northern Idaho, to northern 

 Montana. 



Note on nomenclature. — Formerly designated as Betula occidentalis Hooker. 



NAMES IN USE 



Western Birch. Western Paper Birch. 



Gray Birch. 



Betula papyrifera montanensis (Butler) Sargent. 



Western Paper Birch. 



Range. — Montana (Yellow Bay, Flathead Lake) ; Idaho (Sand Point, Bonner 

 County). 



name in use 



Western Paper Birch 



X Betula sandbergii Britton. Hybrid. 



Range. — Southern Minnesota (Hennepin County). 



Note on nomenclature. — Supposed to be a hybrid between Betula papyrifera 

 Marshall and Betula pumila glandulifera Regel. 



*Betuia kenaica Evans. Kenai Birch. 



Range. — Alaska (Kenai Peninsula from Cook Inlet to Lynn Canal). 

 Note on nomenclature. — Designated by some authors as Betula papyrifera 

 var. kenaica A. Henry. 



NAMES IN USE 



Red Birch. Kenai Birch. 



Black Birch. 



Betula neoalaskana Sargent. Alaska White -Birch. 



Range. — Alaska (Saskatchewan Valley to the Yukon River Valley). Said to 

 occur also on the coast of Alaska. 53 



e2 Formerly confused with the bronze-barked Rocky Mountain species, Betula fontainlis Sargent and 

 Betula papyrifera Marshall, a form of which was thought to occur in Washington and British Columbia. 



« Fide Britton and Shafer, North Am. Trees, 249, 1908.— Betula commixta Sargent, supposed to be a 

 hybrid between Betula neoalaskana Sargent and Betula glandulosa Miohaux, is a shrub occurring in the 

 vicinity of Dawson, Yukon Territory (C. S. Sargent). 



