PLATE 1 
A. —Mature pycnidial stromata of Botryosphaeria ribis grown in a flask on portion' 
of sterile apple twig in greenhouse from November 19, 1921, to February 
22, 1922. X2. 
B. —Mature pycnidial stromata of Botryosphaeria ribis grown in a flask on por¬ 
tion of sterile currant twig in greenhouse from November 19, 1921, to 
February 22, 1922. X2. 
C. —Mature pycnidial and perithecial stromata of Botryosphaeria ribis chromogena 
on small branch of dead currant bush. North Rochester, Mass., June, 
1921. X2. 
D. —Mature pycnidial and perithecial stromata of Botryosphaeria ribis chromogena 
on trunk of same bush as that shown in C. X 2. 
E . —Fruiting culture of Botryosphaeria ribis on corn meal in flask. 
F. — Fruiting culture of Physalospora motorum on corn meal in flask. 
