PLANT BACTERIA, VOL. 2. 



PLATE 4. 



Bacterium pruni. 



Vertical section through a small spot on a green plum 14 days from date of infection, *'. e., before tissues have begun to collapse, showing tissue lifted, 

 stoma disrupted, and bacteria oozing to surface. One of the sprayed plums at Takoma Park, Md. Slide 308 E 19. For an earlier stage of 

 infection, see vol. I, fig. 70. 



