FREMULOIDES, MICHX. 



Quaking Asp, Aspen, 



TRANSVERSE SECTION. 



RADIAL SECTION 



TANGENTIAL SECTION 



Amerikanische Zitter-espe. Sp. Alamo tremblon. 

 eF^. Le Tremble d'Amerique, 



ublished and Sections made by Romeyn B. Hough, B. A., Lowville, N Y. U. S. A. 



