98 



Bulletin 194 



Clierry Birch. Sweet Birdi. Black Bircli 



(Mich. Trees). 



1. Winter twig, x 1. 



2. Portion of twig, enlarged. 



3. Leaf, x 1/2. 



4. Flowering branchlet, x i,^. 



5. Staminate flower, enlarged. 



6. Pistillate flower, enlarged. 



7. Fruiting branchlet, x i/^. 



8. Fruit, enlarged. 



