96 



BIRCH 



Fig. 94. Birch, Betula alba. 1, apex of branch with male ( 3 ) and 

 female ( ? ) catkins ; 2, branch with a fruiting catkin, and, at the tip, 

 young male catkins ; 3 6, groups of <? flowers in front, lateral, upper 

 and lower aspects ; 6*, stamen ; 7, portion of $ catkin; 8 and 9, groups 

 of ? flowers from before and behind ; 10, the scales of the latter ; 11 and 

 12, fruiting scales ; 13, fruit; 14, apex of shoot with young inflorescences; 

 15, transverse section of three-year-old branch (Wi). 



