PLATE LX. 



Fig. 1. Typical leaf of Q. rubra, X V2. 



Fig. 2. Typical leaf of Q. schneckii, X Vz- 



Fig. 3. Typical leaf of Q. coccinea, X V2. 



Fig. 4. Typical leaf of Q. macrocarpa, X Yz. 



Fig. 5. Upper epidermis and palisade cells of Q. rubra, x 275. 



Fig. 6. Upper epidermis and palisade cells of Q. schneckii, X 275. 



