PLATE V 



29. Cut-leaved Birch. 90. (V3) 



30. Sassafras. 12. (V5) 



31. American Elm. 36. (V3) 



32. Slippery Elm. 37. {V4) 



33. Sweet Gum. 87. C/s) 



34. Common Aspen. 24. ('/j) 



35. Large-toothed Aspen. 25. (^/g) 



36. Downy-leaved Poplar. 26. (Vs) 



203 



