BIRCH. 275 
Plate 26. Betula papyrifera. Paper Birch. 
1. Flowering branch, one-half natural size. 2. Lateral branch, showing 
stipules and pistillate catkins, one-half natural size. 3. 
Fruiting branch, one-half natural size. 4. Scale of staminate catkin, rear 
view, enlarged. 5. Staminate flower, enlarged. 6. Stamen, enlarged. 7. 
Seale, bearing pistillate flowers. 8. Scale of fruiting catkin. 9. Nut, en- 
larged. 10. Longitudinal section of fruit. 
unfolding leaves, 
