MAPLE. 



337 



Plate 51. Acer saccharum. Sugar Maple. 



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

 bearing pistillate flowers, one-half natural size. 3. Fruiting branch, one- 

 half natural size. 4. Staminate flower, enlarged. 5. Longitudinal section 

 of staminate flower, enlarged. 6. Pistillate flower, enlarged. 7. Longi- 

 tudinal section of pistillate flower, enlarged. 8. Longitudinal section of 

 fruit, one-half natural size. 9. Longitudinal section of seed, enlarged. 10. 

 Embryo, enlarged, u. Winter branchlet, one-half natural size. 



