26 BOTANICAL GAZETTE [JULY 
eee 
CBA-+sodium asparagi- 
co rH nate+z per cent. glucose. 
A This was a remarkable 
colony with spores distinctly 
+ 
] 
{ 
| 
i 
| 
Cor ECC smoky or olivaceous. 
PEE SERS RSeeeee 
rH FF H suas - M= 5.1422+0.0408 
O intel | T= 0.9214+0.0289 
3 4 ] 6 8 CV 
. V.=17.Q1 o: 
Fic. 27.—Ascochyta Chrysanthemi 7-919 £0-579 
Stevens. Polygon of spores from CBA+ N= 232 
sodium asparaginate + glucose. 
SSeeho SERRS SSSR eee 
SESnSuEuER BeBe 
. ‘ Ho 
Plated thickly in 4 per boo 
cent. pea agar. PEE a secass 
M= 4.3246+0.0392 PETE PEE 
T= 1.0138+0.0277 at SEA 
C. V.=23.442 +0.674 cess H 
paa : : 
mt 
2 3 4 5 6 7 
I 28.—Ascochyta Chrysanthemi 
Stevens. Polvael of spores from 4 per cent. 
pea agar. 
Cow pea agar. 
M= 4.8657+0.0545 
g= 1.1885+0.0386 
C. V.=24.427 +0.839 
N= 214 
: 4 5 
3 
Fic. 29. —Ascochyta Chrysanthemi Stevens. 
Polygon of spores from cow pea agar. 
It is seen that on these different media the mode varies materially, 
being low on pure agar, higher on CBA+sodium asparaginate, and 
still higher when glucose or starch is added. The mode is high also 
in natural media, such as pea agar and cow pea agar. 
