Table III .—Comparative size of host nuclei and of plastids in or near infections of Puccinia graminis tritici form 111 of different ages on seedlings of 
Kanred wheat a 
Dec. 22, 1923 
Cytology 0} Wheat Stem Rust 
583 
2$ 
o 6 
if 
1 ! 
sg . 
^ g o 
gag 
E^.8 
*1 
•0 <v 
■sg 
41 
si 
<U 4 J 
I! 
S 
a 
<D 
% 
m 
>» 
rt 
Q 
xxx^rx 
vnoo 00 a « 
OOO On O «-< 
MOO 
vO vO nO 
XXX 
M Tt CO 
O O' h 
XXXXX 
<N O' CO *n rf 
vO vO J>.nO m 
XXXXX 
XXX 
10 t-. 
XX 
XX 
Tt-CO Tj-QO W 
Cl N n h 0 < 
XXXXX 
XXX 
00 
H 
X 
cm 
to 
O O C< « O' 
« W N N H 
XXXXX 
MO Tf w CM CM 
H W N N « 
XXXXX 
1>.00 1"*00 o 
fOCOfOW CO 
in 10 O 
« ci « 
XXX 
in GO co 
XX 
CM rj- 
Tfr CO 
O' o 
e« CM 
XX 
0 2 . 
m ■'t 
XX 
as 
w 
b Secondary uredinium forming. 
