PLATE 2 
A. —Three asci of Botryosphaeria ribis on gooseberry, from host. 
B. —Ascospores of B. ribis on gooseberry, from host. 
C. —Macropycnospores of B. ribis, grown in pure culture from single ascospores 
from gooseberry. 
D. —Sporophores of macropycnospores of B. ribis in culture. 
E. —Ascus of Physalospora malorum , on apple, from host. 
F. —Ascus of P. malorum showing mode of rupture and ejection of ascospores, 
from host. 
G. —Upper portion of a ruptured ascus of P. malorum with part of the ascospores, 
from host. 
H . —Ascospores of P. malorum, from host. 
I. —Macropycnospores of P. malorum from single ascospores from apple, cultures 
2581 and 2660 from Vienna, Va., and Ambler, Pa. 
J. —Macropycnospores with sporophores from culture. 
K . —Three asci of Botryosphaeria ribis on apple, from specimen 2805 collected 
at Vienna, Va. 
L. —Ascospores of B. ribis on apple, from specimen 2805. 
M. —Macropycnospores of P. ribis on apple, some attached to sporophores, 
from culture 3106 A. from a single ascospore. 
N. —Micropycnospores and sporophores of B. ribis on apple, from culture 3106 
A. Figures A to N. X420. 
O. f —Germinating ascospore of B. ribis after 18 hours at a temperature of about 
12° C. 
P. —Same spore held four hours after the stage shown in O—at a temperature of 
22° C. 
Q. —Germinating ascospore of Physalospora malorum after 18 hours at a tempera¬ 
ture of about 12° C. 
R. —Same spore held four hours after the stage shown in figure 1, at a tempera¬ 
ture of 22° C. Figures O to P. X200. 
