SPRUCE. 



Plate 8. Picca canadensis. White Spruce. 



i. Branch bearing staminate flower, one-half natural size. 2. Branch 

 bearing pistillate flower, one-half natural size. 3. Anther, side view, en- 

 larged. 4. Pollen grain, showing air sacs, enlarged. 5. Branch bearing 

 ripened cones, one-half natural size. 6. Scale of cone with seeds attached, 

 natural size. 7. Scale of cone, rear view, natural size. 8. Cross section of 

 needle, enlarged. 9. General view of tree. 



