Explanation of Pl. XV. 



Pseudotsuga Wilsoniana Hayata. 



Fig. I. A branch with a cone. 



2. Another branch with a smaller cone. 



3. A portion of a young branch, showing hair^ on the branch. 



4. A scale detached from the middle portion of a cone. 



5. The same, seen from within. 



6. A bract-scale. 



7. The same, seen from side. 



8. A seed. 



