234 



BIRCH 



Fig. 72. Birch, Betula alba. 1, apex of branch with male ( <? ) and 

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

 young male catkins ;. 3 6, groups of c? 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, p. 233 (Wi). 



