BOXELDER. 



347 



Plate 55. Acer negundo. Boxelder. 



i. Flowering branch from staminate tree, one-half natural size. 2. 

 Flowering branch from pistillate tree, one-half natural size. 3. Diagram 

 of flower. 4. Staminate n'ower. 5. Pistillate flower. 6. Longitudinal sec- 

 tion of ovary, enlarged. 7. Fruiting branch, one-half natural size. 8. 

 Longitudinal section of fruit, one-half natural size. 9. Embryo, enlarged. 



