PLATE 3 
Bacterial leaf spot of clovers. 
A. —Trifolium medium , zigzag clover. 
B. —Trifolium repens , variety latum , also known as Ladino clover. Photographed 
by transmitted light to show the translucent borders surrounding the lesions. 
C and D.—Leaf and stipules of Trifolium pannonicum. The black streaks in the 
stipules are due to the bacterial infection. 
Collected at Arlington, Va., by Lucia McCulloch. All natural infections. All 
natural-size photographs. 
