72. POPULUS TREMULOIDES, 



Quaking Asp, Aspen. 



TRANSVERSE SECTION 



RADIAL SECTION 



TANGENTIAL SECTION 



Amerikanische Zitter-espe. Sp. Alamo trembloi 

 $V. Le Tremble d'Amerique, 



Published and Sections made by Romeyn B. Housh, B. A.. Lowvllle. N Y.. U. S. A. 



