94 



MISC. PUBLICATION 17 7, U. S. DEPT. OF AGRICULTURE 



Miscellaneous Publication 477, U. S. Dept. cf Agriculture 



PLATE 2 



Leaf surfaces of Quercus: A, Short tomentum — lower surface of Q. oleoides Schlecht. 

 and Cham.; B, loose tomentum — lower surface of Q. humboldtii Bonpl.; C, 

 raised veins — upper surface of Q. benthami A. DC; D, raised veins — lower 

 surface of Q. benthami A. DC. ; E y impressed veinlets — upper surface of Q. tristis 

 Liebm. ; F, granular bullate surface — lower surface of Q. tristis Liebm. (all X 10) ; 

 G, impressed veins — upper surface of Q. pilicaulis Trel. (X 3); H, prominent 

 reticulum — lower surface of Q. -pilicaulis Trel. (X 3). 



