EXPLANATION OF THE PLATES. 



Plate CCCCIX. Quercus rubra. 



1. A flowering branch, natural size. 



2. A stanainate flower, enlarged. 



3. A stanien, front and rear view, enlarged. 



4. A pistillate inflorescence, enlarged. 



5. A pistillate flower, enlarged. 



6. A pistillate flower, the involucre removed, enlarged. 



7. Vertical section of a pistillate flower before fecundation, enlarged 



8. A leaf, natural size. 



9. A leaf, natural size. 



Plate CCCCX. Quercus rubra, 



1. A fruiting branch, natural size. 



2. A fruit, natural size. 



3. A fruit, natural size. 



4. A cup, natural size. 



5. Vertical section of a fruit, natural size. 



6. A seed, natural size. 



7. A leaf, natural size. 



8. A fertile winter branchlet, natural size. 



