PLATE VI 



37. Balsam Poplar. 45. (V4) 



38. Balm of Gilead. 46. (Vs) 



39. Cottonwood. 66. C/^) 



40. Lombardy Poplar. 68. (V2) 



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



42. Red Bud. o. (Vi) 



43. American Beech. 40. (%} 



