PLATE VI 



37. Balsam Poplar. 45. (V 4 ) 



38. Balm of Gilead. 46. (V 6 ) 



39. Cotton wood. 66. ('/-j) 



40. Lombardy Poplar. 68. (Y 2 ) 



43 



41. Silver-leaf Poplar. 89. ( 2 /s) 



42. Red Bud. 9. (Va) 



43. American Beech. 40. (%) 



?07 



