97. POPULUS HETEROPHYLLA, L. 



Swamp Poplar, Downy Poplar, River Cottonwool 



I 



TRANSVERSE SECTION. 



RADIAL SECTION 



TANGENTIAL SECTION 



Sumpf-Pappel. eFz, Peuplier marecageaux, Sp. Alamo pantonos 



Published and Sections made by Romey* B. Hough, B. A., Lowvffle, N. Y M U. S. A. 



