PLATE IV 


28 
19. Striped Maple. 101. (/5) 24. American Linden. 20. 
20. Mountain Maple. 102. (}/,) 25. Paper Birch. 29. (3/2) im 
21. Cut-leaved Maple. 103. (3/4) 26. White Birch. 65. (4/3) 
22. Ash-leaved Maple. 122. Gh) 27. Red Birch. 33. (2/4) 
23. Chestnut. 41. (/;) 28. Sweet Birch. 31. y,) 
199 
