CHECK LIST OF FOREST TREES 79 



Note on nomenclature. — Formerly designated as Betula alaskana Sargent 

 (1901), not of Lesquereux (1883). 



NAMES IN USE 



Alaska Birch (lit.). Alaska White Birch. 



White Birch. Yellow Birch. 



Setula fontinalis Sargent. 54 Red Birch. 



Range. — British Columbia (Upper Fraser River to Peace River) and south- 

 ward to California (canyons about Mount Shasta and eastern slopes of the 

 northern Sierras); eastward in Alberta and the valley of the Saskatchewan; 

 southward in the Rocky Mountains through Nevada. Utah, northern &Tew 

 Mexico and Arizona, and Colorado (eastern base of Rockies); eastward to r /tth- 

 western Nebraska and to South Dakota (Black Hills). 



Note on nomenclature. — Formerly included, in part, under Betuh i^cci- 

 dentalis Hooker, with which it was confused. 



NAMES IN USE 



Black Birch (Calif., Colo., Mont., Utah). Birch (Utah, Oreg., Calif.). 

 Red Canyon Birch. Swamp Birch (Mont.). 



Can von Birch (Utah). Western Red Birch. 



Water Birch (Colo., Mont.). Red Birch. 



Sweet Birch and Cherry Birch (Idaho). 

 Western Birch and Mountain Birch 

 (lit.). 



Betula fontinalis piperi (Britton) Sargent. Red Viich. 



Range. — Eastern Washington (vicinity of Pullman and Almota, WMtraan 

 County, and of Spokane, Spokane County). 



Note on nomenclature. — Originally described as Betula piperi Britton. 



NAME IN USE 



Red Birch 



Betula eastwoodse Sargent. 55 Alaska Red Bhch. 



Range. — British Alaska (Yukon District, on Hunker Creek and in wamps 

 about Dawson, valley of the Yukon River) . 



NAME IN USE 



Alaska Red Birch 

 ALNUS Linnaeus 



Alnus sinuata (Kegel) Rydberg. 58 Sitka Alder. 



Range. — Northwest coast from Alaska (borders of the Arctic Circle) to Cali- 

 fornia; eastward through British Columbia to Alberta; and through Wa ihington 

 and Oregon to Montana. 



Note on nomenclature. — Formerly designated as Alnus sitchensu (Regel) 

 Sargent. 



14 Britton and Shafer (North Am. Trees, 254, 190S) record in this sequence Betula utahensis Jritton, the 

 Utah Birch, which occurs, so far as is now known, only in the vicinity of Salt Lake. Utah, and is dis- 

 tinguished by the densely glandular, resinous, greenish brown young twigs, which later L?i ome bright 

 brown and shining. I have not seen specimens of this birch, which is possibly a form or varii ty of Betula 

 fontinalis Sargent. 



55 Macoun first collected specimens of this birch in 1902, and in 1914 Alice Eastwood found th t tree, which 

 is related to the shrubby Betula glandulosa Michaux. 



M Britton and Shafer (North Am. Trees, 260, 1908) maintain this species under the name A hws fruticosa 

 Ruprecht, the belief of these authors being that the North American plant is not distinct from the Siberian 

 species. The writer believes, however, that our alder is specifically distinct from the Asiatic plant. 



56751°— 27 6 



