Bui. 1038, U. S. Dept. of Agriculture. 



PLATE VIII. 



Vertical Sections of Normal and Mottled Pecan Leaflets, Frotscher 



Variety. 



Collected in August, 1919; at Thomasville, Ga. Killed with Carnoy's fluid; Jleming's triple stain 

 used. X 540. A. — Section of normal leaflet. B.— Green portion of mottled leaflet, showing the 

 enlargement of the cells, the reduction in size of the intercellular spaces in the spongy parenchyma, 

 and the unevenness in the arrangement of the palisade cells. Photomicrographs by the writer. 



