PLATE XLIV. YELLOW BIRCH. 



1 Pl,.\viTin" liiancli ivith (s) staminate flowers, and Ip) pistillate flowers, x J. 

 2! BrniK-li with mature- leaves and four fruiting strobiles, x J. 



3. A winged seed, enlarged. 



4. A strobile scale, enlarged. . . . ^ . . 1 



5 Winter branch witli partly developed terminal staminate aments, X t. 



6 Section of a lateral winter twig, enlarged. 

 7. Section of a terminal winter twig, enlarged. 



