Betulaceae 



.dular and hairy on the veins beneath, slender- 

 petioled 1^-4 inches long. Staminate cat- 

 kins 2-4 inches long ; pistillate catkins f of an 

 inch or more long. 



Sparingly on the slopes in the vicinity of 

 Field, British Columbia; not a common tree. 



A tree sometimes 100 feet high 

 but much smaller in our region; 

 the bark smooth dark bronze; 

 twigs gray-brown, warty. 

 Leaves broadly ovate or nearly 

 sharply serrate, short-petioled, 



smooth on both sides or sparingly hairy 



beneath -2 inches long. 



On river shores throughout the region, 



sparingly from Field west. 



Betula occi- 

 dentalis 

 Hook. 



Western Red 

 Birch. 



orbicular, 



Betula glan- 

 dulosa 



Michx. 

 Glandular 

 Birch, Scrub 

 Birch. 



beneath, 



A shrub 1-8 feet with brown, 

 glandular, warty twigs. Leaves 

 orbicular, oval or ovate, smooth, 

 rounded at the apex, crenate- 

 dentate, bright green above, 

 pale and sticky, glandular-dotted 

 short petioled, J-i inch long. 



