142 



TREES OF MINNESOTA. 



9 X^ i- 



Plate 5. Pinus sylvestris. Scotch Pine. 



1. Branch bearing staminate flowers, one-half natural size. 2. Branch bear- 

 ing pistillate flowers and young cones, one-half natural size. 3. Branch bearing 

 pistillate flowers after pollination, one-half natural size. 4. Unopened pistillate 

 flower, enlarged. 5. Scale of pistillate flower, rear view, enlarged. 6. Scale of 

 pistillate flower, front view, enlarged. 7. Anther, enlarged. 8. Branch bearing 

 ripe cone and young cone, one-half natural size. 9. An open cone, one-half 

 natural size. 10. Scale of cone, one-half natural size. 11. Seeds with wings at- 

 tached. 12. Seed, natural size. 13. Seedling, one-half natural size. 



