BOXELDER. BAT 
Plate 55. Acer negundo. Boxelder. 
1. 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 tlower. 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. 
