THK J'AltASlTK 1 KXoA--' l.AI 



Exoascus coerulescens (Mont, et l>esm.) 

 blisters on oak leaves. 



c 



L67 

 produces -imilar 



) 



Fi... I..;. /: ' us. Leaf section from the margin of a swelling, showing 



normal and hyivrtrMphic-.l tissue. The i-.-lls ..f tin- swelling are abnormally 

 elongated witli thi'-keiu-.l walls, .-md s.imo show .s L .(.-,,ii'l:iry cell-division. Tlic 

 bases of the usci arc wedged in lietweeii the cells; oiu- asCUfl i- sli..wn with 

 conidiu. (v. Tul.cuf .l.-l. ) 



Exoascus carneus -lolian. occurs on leaves of 1'xtnli odorctia, 

 /!. nana, and 11. intermedia. The pustular out-rowths ri-c a 



i,.. 04. j '. (v. TuK'iii' 'hi.) 



i Section of i, :ii i, if ..! | 



V W. O. SliiH 



I tioll o| 1, if h> |" I t I'liphl 



Litt.l' ' till- 



filllKlli ''...it tl ! 



v. ltd tin- tltll I 



ItlO 



