58 SILVA OF NORTH AMERICA. conifers. 



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raised high above its broad base of widely sweeping and gracefully upturned branches resting on the 

 surface of the ground, its slender branchlets loaded with handsome cones nodding in the slightest 



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breeze, and its leaves, now silvery white and now dark and lustrous, shimmering in the sunlight. 



EXPLANATION OF THE PLATE, 



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Plate DCIL Picea Sitchensis. 



1. A branch with staminate flowers, natural size. 



2. An anther, front view, enlarged. 



3. An anther, side view, enlarged. 



4. A branch with pistillate flowers, natural size. 



5. A pistillate flower, natural size. 



6. A scale of a pistillate flower, lower side, with its bract, enlarged. 



7. A scale o£ a pistillate flower, upper side, with its ovules, enlarged, 



8. A fruiting branch, natural size, 



9. A cone-scale, lower side, with its bract, enlarged. 



10. A cone-scale, upper side, with its seeds, enlarged. 



11. Vertical section of a seed, enlarged. 



12. An embryo, enlarged. 



13. A leaf divided transversely, enlarged, 



14. Cross section of a leaf magnified fifteen diameters. 



15. A seedling plant, natural size. 



16. Winter-buds, natural size. 



