BETULA POPULJFOL1A, MARSHALL 

 6 Birch, Poplar-leaved Birch, Old-field Birch,, 



RANSVERSE SECTION 



RADIAL SECTION 



^, Pappelhlattrige Birke S-p. Ahedul hlanco. 

 eF*,. Bouleau hlanc, 



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



