PLATE XLIII. PAPER BIRCH. 



Flowering branch with immature leaves, (s) starainate flowers, (p) pistillate flowers, x i. 

 Branch, with mature leaves, fruiting strobiles, and partly developed staminate aments, x i. 

 A winged seed, enlai'ged. 

 A strobile scale, enlarged. 



A winter branch with 3 partly developed terminal staminate aments, x 1. 

 Section of a lateral winter spur-branch, enlarged. 

 Section of a terminal winter branch, enlarged. 



