Yellow Birch. Gray Birch 



1. Winter twig, x I. 



2. Portion of twig, enlarged. 



3. Leaf, x y 2 . 



4. Flowering branchlet, x l /z. 



5. Staminate flower, enlarged. 



6. Pistillate flower, enlarged. 



7. Fruiting branchlet, x y 2 . 



8. Fruit, x 10. 



88 



