BIRCH 



275 





.: 



Plate 26. Betula papyri/era. Paper Birch. 



i. Flowering branch, one-half natural size. 2. Lateral branch, showing 

 unfolding leaves, stipules and pistillate catkins, one-half natural size. 3. 

 Fruiting branch, one-halt natural size. 4. Scale of staminate catkin, rear 

 view, enlarged. 5. Staminate flower, enlarged. 6. Stamen, enlarged. 7. 

 Scale, bearing pistillate flowers. 8. Scale of fruiting catkin. 9. Nut, en- 

 larged. 10. Longitudinal section of fruit. 



