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TREES OF MINNESOTA. 



Plate 26. Betula papyrifera. Canoe Birch. 



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

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

 ing branch, one-half natural size. 4. Scale of staminate catkin, rear view, en- 

 larged, 5. Staminate flower, enlarged. 6. Stamen, enlarged. 7. Scale bearing 

 pistillate flowers. 8. Scale of fruiting catkin. 9. Nut, enlarged. 10. Longi- 

 tudinal section of fruit. 



