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TREES OF MINNESOTA. 



Plate 58. Fraxinus nigra. Black Ash. 



1. Flowering branch of staminate tree, one-half natural size. 2. Flowering 

 branch of pistillate tree, one-half natural size. 3. Pistillate flower showing rudi- 

 mentary stamens, enlarged. 4. Longitudinal section of ovary, enlarged. 5. 

 Fruiting branch, one-half natural size. 6. Longitudinal section of fruit, one-half 

 natural size. 7. Embryo. 8. Winter branehlet. one-half natural size. 



