PLATE IV 



19. Striped Maple. loi. (V5) 



20. Mountain Maple. 1 02. {V4) 



21. Cut-leaved Maple. 103. (7^) 



22. Ash-leaved Maple. 122. (74) 



23. Chestnut. 41. (Vg) 



24. American Linden. 20. O/4) 



25. Paper Birch. 29. (Vg) 



26. White Birch. 65. (V3) 



27. Red Birch. 33. (V^) 



28. Sweet Birch. 31. (1/4) 



199 



