KEY TO GENERA AND SPECIES 



47 



in the mountains to Ga. (Figs. 78, 79.) 

 Red Spruce, Yellow Spruce, Picca rubra 

 (Du Roi) Dietr. 



87. Leaves | to f of an inch long. Cones \ to \\ 

 inches long, remaining attached to the branch 

 for many years; cone scales usually with 

 the margin irregularly finely toothed (as if 



Fig. 78. 

 Red Spruce. 



Fig. 79. Red Spruce. 



gnawed). Tree of swamps or low lands, 

 rarely on uplands, usually with a columnar 

 crown and less than 30 feet high. Occa- 

 sionally fruiting when only 3 or 4 feet high. 

 W. Va. northeastward and northwestward. 

 (Fig. 80.) Black Spruce, Swamp Spruce, 

 Bog Spruce, Picea mariana (Mill.) BSP. 



88. Leaves pointed, often sharply 89. 



88. Leaves blunt, less than f inch long, thick, 



