PLATE XLVII. BLACK BIRCH. 



1. Flowering brainb with (s) staminate flnwers. i p) pistillatt* Hovvcir 



2. Brancn with mature leaves aud three fruitiog strobiles, x h- 



3. A winged seed, enlarged. 



4. A strobile scale, enlarj:ed, 



5. Winter branch with partly developed terminal staminate nments. i J. 

 8. Section of a winter twig, enlarged. 



N J 



