22 BOTANICAL GAZETTE [JULY 
Pycnidium no. 2. Large type. 
| EEE M= 4.4318+0.0398 
HHH «=o = 0.9589: 0.0281 
EEEEE HH C. V.=21.638 +0.650 
cH N= 254 
PHT Pycnidium no. 3. From 4a 
3 Sey See ' ats plate bearing one large - colony. 
_. The whole colony was character- 
eS Si Seaae ee pelea istically one of few pycnidia, 
pycnidium no. 2, large type. which were of large type and 
light color. The spores were 
obtained without any possibility of the pycnidium being torn; that 
is, they were normally ripe spores. 
M= 3.3848+0.0245 
= 0.6714+0.0173 
C. V.=19.836 +0.531 
n= 343 
I 
Tri 
il 
| 
SS a ON 
It is seen that these 
three separate pycnidia 
of the same type gave 
| 
ia 
Lis 
| 
Pee ee EE tt et 
| EG Cee OL ME WE WR 
je te PA ae De A 
+p 4 
AE ee SORE SH Se we wT 
CME R BH ART a 
modes of 4.9645+0.- sauna oH 
0393, 4.4318+0.0308, PAH 5 
and 3.3848+0.0245; or, sauuas H 
expressed in terms of Fedo : 
the systematist, that in FAtH 
ptt | 
} 
| 
the three pycnidia the § 
spores measured 11.1 4 
-29.6 4, mostly 18.5; © 
II.1-25.9 #, mostly 14. - 
8 #@; 7.4-22.2 #, most 18.—Ascochyta Chrysanthemi Stevens- 
Fee - spores from pycnidium no. 3, large typ® 
it 
Zé 3 4 5 6 7 8 
ly 
II.I@; showing that 
measurements from one pycnidium alone are not sufficient for 
reliable characterization. 
