Bui. 213, Bureau of Plant Industry, U. S. Dept. of Agriculture. 



Plate XXVI. 







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(A) Photomicrograph of section through a very young daisy gall on rib of daisy leaf. The 

 most of the cells of the leaf rib are not yet involved in the abnormal growth. 



(B) Photomicrograph of section of small daisy gall, showing supporting stroma and abnormal 

 conductive tissue at y. A small portion of the nearly normal tissue is shown at x. 



