Bui. 544, U. S. Dept of Agriculture. 



Plate II. 



Fiq. 1.— In the Virgin Forest. 



Fig. 2.— In an Opening Made by a Cutting 12 Years Previous. 



Fig. 3.— Under a Stand of White Birch and Popple on a Burn of 40 Years Ago. 

 SPRUCE REPRODUCTION. 



