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TREES OF MINNESOTA. 



Plate 4. Pinus ponderosa scopulorum. Bull Pine. 



1. Knd of branch bearing staininate flower, enlarged. 2. End of branch- 

 bearing pistillate flower, enlarged. 3. Anther, open. 4. Scale of pistillate 

 flower attached to bract, front view, enlarged, 5. Scale of pistillate flower at- 

 tached to bract, rear view, enlarged. 0. Cone, one-half of natural size. 7. Scale 

 of cone, rear view, one-half natural size. 8. Seed attached to wing. 1). Branch 

 showing young growth, one-half natural size. 10. Fascicle of three needles, one- 

 half natural size. 11. Fascicle of two needles, one-half natural size. 12. Cross 

 section of needle from three-leaf fascicle. IS. Seedling, one-hull' natural size. 



