FOREST TREES AND FOREST REGIONS OF THE U. S. 15 



; 'igure 5. — Leaves, fruit, and twigs of hardwood trees characteristic 'of the northern forest region: A, 

 American elm (p. 14); B, white ash (p. 23); C, sugar maple (p. 20); D, northern red oak (p. 12); 

 E, pignut hickory (p. 8); F, butternut (p. 8); G, beech (p. 10); H, sweet (or black) birch (p. 10); (see 

 also p. 39). 



