EXPLANATION* OF THE PLATE. 

 Plate CLXXXIII. P p ULUS Sargentii. 



1. A flowering branch of the staminate tree, natural size 



2. A staminate flower, enlarged 



3. A scale of a staminate flower, rear view, enlarged. 



4. A stamen, enlarged. fe 



5. A flooring branch of the pistillate tree, natural size, 

 b. A pistillate flower, enlarged. 



7. A scale of a pistillate flower, enlarged 



8. A vertical section of a pistillate flower; enlarged, 

 y. A fruiting branch, natural size 



10. A fruit, enlarged. 



11. A branch, with leaves, natural size. 

 1A A winter branchlet, natural size. 



