SPRUCE. 219 
Plate 9. Picea mariana. Black Spruce. 
1. Branch bearing staminate flowers, one-half natural size. 2. Branch 
bearing pistillate flowers, one-half natural size. 3. Anther, enlarged. 4. 
Scale of pistillate flower, enlarged. 5. Branch bearing ripened cones, one- 
half natural size. 6. Seeds, enlarged. 7. Scale, front view, natural size. 
8. Scale, rear view, natural size. 9. General view of tree as found in the 
muskegs of northern Minnesota. 
