28 



BACTERIAL DISEASES OF PLANTS 



FIG. 19. Bacterium translucens var. undulosum S., J. R. from black chaff of 

 wheat. No. 678, El Reno, Oklahoma. Surface and buried yellow colonies on 

 + 15 beef-peptone agar plate. Plated June 24, 1918 (from a glume). Photo- 

 graphed July 2, by oblique light; surface smooth. At x an intruding colony. 

 X 10. 



