28 BOTANICAL GAZETTE [JULY 
Although the number of spores measured in the two last instances 
is not large, the fact of a tendency to larger spores on the poorer me- 
dium, apple agar, is evident. The spores measured 33.6-133.2 #4, 
mostly 81.4 “; those on pure agar 48.1-181.3 », mostly 133.2 B. 
ASCOSPORES OF SCLEROTINIA LIBERTIANA FUCKEL 
i Trip 
3 350-4 45 5 
Fic. 32.—Sclerotinia Libertiana 
Fckl. Polygon of ascospores from 
middle-aged disk. 
Spores were secured as in the 
last instance, but from very young 
isks. 
M=4.0393+0.0214 
T=0.37430.0151 
C. V.=9.267 +0.380 
n= 165 
No material difference in the size 
of the spores here appeared with the 
change in age of the disks. 
M= 
7=0.2930+0.0117 
I C. V.=7.168 +0.290 
N=142 
Spores were discharged spon- 
taneously from the disk upon the 
cover glass, the disk being of middle 
age. 
4.0880+0.0166 
ea! 
Me at SD SS a A a 
OES RR REN a SS 
CECE 
2. 8.4 46% 
Fic. 33.—Sclerotinia Libertian@ 
Fekl. Polygon of spores from young 
disk. 
