MM'I.K. 



341 



Plate 53. Acer saccharinum. Silver 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. Pistillate flower, en- 

 larged. 6. Pistil, enlarged. 7. Longitudinal section of pistillate flower, en- 

 larged. 8. Longitudinal section of samara, one-half natural sizo. o. 

 l.iiii^ituilinal section <ii" -rid, enlarged. 10. Embryo, enlarged, n. Km- 

 bryo, displayed, enlarged. 



