EXPLANATION OF THE PLATES. 



Plate CCCCXXXIL Quercus imbbicabia 



1. A flowering branch, natural size. 



2. A staminate flower, enlarged. 



3. A pistillate flower, enlarged. 



4. A fruiting branch, natural size. 



5. A fruit, natural size. 



6. A leaf, natural size. 



7. A leaf, natural size. 



8. A winter branchlet, natural size. 



Plate CCCCXXXIIL Quercus imbbicabia x Mabilandica, 



1. A fruiting branch, natural size. 



Plate CCCCXXXIV. Quercus imbbicabia x velutina 



1. A flowering branch, natural size. 



2. A staminate flower, enlarged. 



3. A pistillate flower, enlarged. 



4. A fruiting branch, natural size. 



