ion 



Bulletin 194 

 Yellow Birch. (Jray Birch 



(Mich. Trees). 



1. Winter twig, x 1. 



2. Portion of twig, enlarged. 



3. Leaf, x J/.- 



4. Flowering branchlet, x i/2- 



5. Staminate flower, enlarged. 



6. Pistillate flower, enlarged. 



7. Fruiting branchlet, x i4. 



8. Fruit, X 10. 



