Bui. 1038. U. S. Dept. of Agri 
culture. 
Plate IX. 
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Horizontal Sections of Normal and Mottled Pecan Leaflets. 
A and B.— Horizontal sections through the palisade tissue illuslral ed in figures A and B of Plate VIII, 
showing the enlargement of the short diameter of the palisade cells in the mottled leaflet (B). C 
and D. — Horizontal sections through the spongy parenchyma illustrated in figures A and B of 
Plate VIII, showing the enlargement of the cells and the reduction in size of intercellular spaces in 
the green area surrounding a yellow spot in the mottled leaflet (D). All figures X 540. Photo- 
micrographs by the writer. 
