EXPLANATION OF THE PLATES. 



Plate DLXIX. Pnsrus Sabiniana. 



1. A branch with staminate flowers, natural size. 



2. An involucre of a staminate flower, enlarged. 



3. A bract of a staminate flower, enlarged. 



4. Diagram of the involucre of the staminate flower. 



5. An anther, front view, enlarged. 



6. An anther, side view, enlarged. 



7. End of a branch with pistillate flowers, natural size. 



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



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



10. A cone one year old, natural size. 



11. Tip of a leaf, enlarged. 



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



13. Winter branch-buds, natural size. 



Plate DLXX. Pintjs Sabiniana. 



1. A cone, natural size. 



2. A seed, natural size. 



3. A wing of a seed, natural size. 



4. Vertical section of a seed, natural size. 



5. An embryo, enlarged. 



