EXPLANATION OF THE PLATES. 
PuaTte LXXXVI. AcER MACROPHYLLUM. 
. A flowering branch, natural size. 
A staminate flower, enlarged. 
. Vertical section of a staminate flower, enlarged. 
A stamen, enlarged. 
. A pistillate flower, enlarged. 
. Vertical section of a pistillate flower, enlarged. 
NAT PP wd 
. Vertical section of an ovary, enlarged. 
PuaTE LXXXVII. Acer mMAcRoPpHYLLUM. 
1. A fruiting branch, natural size. 
2. Vertical section of a samara, natural size. 
3. An embryo, much magnified. 
4. An embryo displayed, much magnified. 
5. A winter branchlet, natural size. 
