VEGETATIONAL ANALYSIS 



63 



SPRUCE 

 FLAT 



SPRUCE 

 HARDWOODS 



OLD FIELD 

 SPRUCE 



SPRUCE 

 SLOPE 



Picea 

 rubens 



Abies 

 balsamea 



Betula 

 lutea 



Betula 

 papyrif era 



Acer 



rubrum 



Fraxinus 

 americana 



Acer 



saccharum 



Sorbus 

 americana 



FIG. 26. Phytographs showing the relative importance of the dominant 

 species of trees in four types of pulpwood forest in northwestern Maine. 

 Radius 1, percentage of total dominant abundance; Radius 2, percentage fre- 

 quency; Radius 3, percentage of total size classes represented; Radius 4, per- 

 centage of total dominant basal area. The inner end of each radius represents 

 the absence of its assigned sociological value. 191 



