EXPLANATION OF THE PLATE. 



Plate DLXXIX. Pinus riglda. 



1. A branch with staminate flowers, natural size. 



2. Diagram of the involucre of the staminate flower. 



3. An involucre of a staminate flower, enlarged. 



4. An anther, front view, enlarged. 



5. A branch with pistillate flowers, natural size. 



6. A pistillate flower, enlarged. 



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



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



9. A fruiting branch, natural size. 



10. A cone, natural size. 



11. A seed, natural size. 



12. Portion of a stump shoot with primordial leaves, natural size. 



13. Cross section of a primordial leaf, enlarged. 



14. A cluster of foliage leaves, natural size. 



15. Tip of a leaf, enlarged. 



16. Cross section of a leaf magnified fifteen diameters. 



17. Winter branch-buds, natural size. 



18. A seedling plant, natural size. 



