Sweet Birch 



Sweet Bircm 



a. Winter twig, x 1. 



b. Portion of twig, enlarged. 



c. Leaf, X i/^. 



d. Flowering branchlet, x 1/4- 



e. Staminate flower, enlarged. 



f. Bract with pistillate flowers, enlarged, 



g. Fruiting branchlet, x i/4. 

 h. Fruit, enlarged. 



Gray Birch 



i \-' '^~^'^'' 



■-'-1 u.-v' I I aM^ 



[152] 



