PLATE 2 
A. —Tip of a delphinium leaf showing infected (blackened) water pores. 
Time, 20 days after inoculation in the hothouse with the organism from Oregon. 
X 10. 
B. —Microtome section of a normal water pore. The blade spots are nuclei. 
C. —Microtome section of an infected water pore. 
D. —Small leaf spots showing zoning. Photographed from a fresh leaf re¬ 
ceived from Connecticut. X 4. 
E. —Large leaf spot showing zoning. Photographed from a pressed leaf from 
Castine, Me. X 2§. 
