EXPLANATION OF THE PLATE. 



Plate DXLVIIL Pintjs albicaums. 



1. An end of a branch with staminate flowers, natural size. 



2. A staminate flower, enlarged. 



3. Diagram of the involucre of the staminate flower. 



4. An anther, front view, enlarged. 



5. An anther, side view, enlarged. 



6. An end of a branch with pistillate flowers, natural size. 



7. A pistillate flower, enlarged. 



8. A scale of a pistillate flower, under side, with its bract, enlarged. 



9. A scale of a pistillate flower, upper side, with its ovules, enlarged. 



10. A fruiting branch, natural size. 



11. A cone-scale, upper side, natural size. 



12. Vertical section of a seed, enlarged. 



13. An embryo, enlarged. 



14. Tip of a leaf, enlarged. 



15. Cross section of a leaf, magnified fifteen diameters. 



